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-   -   RGP's resting at the bottom of the cornea, is this normal? (http://www.lens101.com/gas-permeable-contact-lenses/98824-rgps-resting-bottom-cornea-normal.html)

Auhydride 03-19-2010 05:44 PM

RGP's resting at the bottom of the cornea, is this normal?
 
Hello
My doctor told me i should use RGP lenses because of my astigmatism and big size of my cornea.
I tried the lenses today, and did a small research on the topic before and unlike the information on this page:
http://www.eyetec.net/group7/images/m35ani2.gif

http://www.eyetec.net/group7/M35S1.htm
My lenses does not center on my cornea at all, they rest at the bottom of the cornea, i can clearly see the edge of the lens and my vision was this:

http://img.photobucket.com/albums/v636/ni-mh/vision.jpg

And I could easily push my lower eyelid up to have much better vision.
I did share my concerns with my doctor, but she was happy with the lens' fitting and my first pair is on going to be ordered.
I don't know the brand or any similiar info.

Would like to hear if there seem to be anything wrong.
Thanks

unclebuck 03-22-2010 09:11 AM

RGP's resting at the bottom of the cornea, is this normal?
 
Wow. Cool pictures Auhydride.

I'm not an eye doctor, not have I see your eyes (as far as I know) so it's hard for me to give a diagnosis over the Internet. In my unprofessional opinion it would seem to me that your contacts do not fit properly, despite your eye doctor's assurances. Maybe you can ask her to try a different size, just for laughs. Of course, you will probably be charged a fee for her time and expertise, but maybe you can get some satisfaction that way. If not, you can always find another doctor.

I wish you well, and I hope to hear back from you soon to find out how this worked out for you.

Knotlob 03-22-2010 12:06 PM

Quote:

Originally Posted by Auhydride (Post 120821)
Hello
My doctor told me i should use RGP lenses because of my astigmatism and big size of my cornea.
I tried the lenses today, and did a small research on the topic before and unlike the information on this page:
http://www.eyetec.net/group7/images/m35ani2.gif

http://www.eyetec.net/group7/M35S1.htm
My lenses does not center on my cornea at all, they rest at the bottom of the cornea, i can clearly see the edge of the lens and my vision was this:

http://img.photobucket.com/albums/v636/ni-mh/vision.jpg

And I could easily push my lower eyelid up to have much better vision.
I did share my concerns with my doctor, but she was happy with the lens' fitting and my first pair is on going to be ordered.
I don't know the brand or any similiar info.

Would like to hear if there seem to be anything wrong.
Thanks

Hello Auhydride and welcome to the forum.

I'm not an eye doctor either, but I have recently started wearing RGP Contact Lenses. I am pretty sure my lenses sit firmly in the centre of my cornea and if they do go off centre because I have rubbed my eyes, very often they will recentre themselves (provided I haven't pushed them off the cornea altogether). So, it does sound like your lenses are not correctly fitted.

The second point is that RGP Lenses take more effort to fit (than soft lenses for example) and your optician may fit a second or even a third pair to ensure the correct fit over a period of several weeks. I had a second pair as the first had too tight a base curve in practice. Do you have any follow up appointments scheduled? (My optician actually says I can bring the lenses back for a refund if my RGP lenses don't work out after 3 months!)

knotlob

Railfan 03-22-2010 02:37 PM

Keep Trying
 
Quote:

Originally Posted by Knotlob (Post 120874)
Hello Auhydride and welcome to the forum.

I'm not an eye doctor either, but I have recently started wearing RGP Contact Lenses. I am pretty sure my lenses sit firmly in the centre of my cornea and if they do go off centre because I have rubbed my eyes, very often they will recentre themselves (provided I haven't pushed them off the cornea altogether). So, it does sound like your lenses are not correctly fitted.

The second point is that RGP Lenses take more effort to fit (than soft lenses for example) and your optician may fit a second or even a third pair to ensure the correct fit over a period of several weeks. I had a second pair as the first had too tight a base curve in practice. Do you have any follow up appointments scheduled? (My optician actually says I can bring the lenses back for a refund if my RGP lenses don't work out after 3 months!)

knotlob

Thanks for putting in your two cents--or whatever the European equivalent would be. ;) I hope Auhydride finds comfort in the fact that it's quite common to have to try more than once to get the right fit for RGP lenses. I know it was good for me to find that out.

Auhydride 04-16-2010 07:45 AM

hello again, thanks for the support.
So i got my lenses yesterday, I can't read anything, my vision is blurry, and every light source is like small fireworks.

Heres a photo.
http://img.photobucket.com/albums/v6...DSC_3894-1.jpg

Knotlob 04-16-2010 08:04 AM

Quote:

Originally Posted by Auhydride (Post 137349)
hello again, thanks for the support.
So i got my lenses yesterday, I can't read anything, my vision is blurry, and every light source is like small fireworks.

Heres a photo.
http://img.photobucket.com/albums/v6...DSC_3894-1.jpg

Hello Auhydride

Is that photo one with the new lenses? The lens seems way off centre. I can barely see my lenses and they are centred at most times. But your photo shows the lens too low in my opinion.

I guess you should give the lenses a couple of days to settle down (since your optician is happy with the fit) but if things don't improve, then go back and tell the optician what symptoms you have, apart from the lens sitting low.

knotlob

Sevateem1 04-16-2010 10:09 AM

Hang In There
 
Quote:

Originally Posted by Auhydride (Post 137349)
hello again, thanks for the support.
So i got my lenses yesterday, I can't read anything, my vision is blurry, and every light source is like small fireworks.

Heres a photo.
http://img.photobucket.com/albums/v6...DSC_3894-1.jpg

Wow, I've never seen a picture that showed a contact lens in the eye so clearly. Unfortunately, my admiration of the photo probably won't help you very much.

You said that you have "big corneas." That may be the reason for the slippage. If that's the case, it may require some patience on your part to get a good fit. If your corneas are unusually large, it may take some time to get the right base curve. Hang in there, Auhydride. Hopefully you can move past this awkward stage and begin to wear your RGP lenses comfortably soon.

Knotlob 04-16-2010 02:12 PM

Quote:

Originally Posted by Sevateem1 (Post 137372)
Wow, I've never seen a picture that showed a contact lens in the eye so clearly. Unfortunately, my admiration of the photo probably won't help you very much.

You said that you have "big corneas." That may be the reason for the slippage. If that's the case, it may require some patience on your part to get a good fit. If your corneas are unusually large, it may take some time to get the right base curve. Hang in there, Auhydride. Hopefully you can move past this awkward stage and begin to wear your RGP lenses comfortably soon.

When I had my RGP lenses fitted, my optician measured the vertical and horizontal base curves on each eye. The horizontal and vertical base curves were averaged to give a single base curve, one for each eye. I have very flat corneas, but the optician was still able to fit the lenses OK. There should be some movement of the lens on the cornea when you blink, but the lens should self recentre very quickly - I don't even notice it moving. Large diameter corneas should not make a huge difference in fit, though maybe a larger diameter lens may be prescribed for aesthetic reasons/make the contact lens lens visible.

In auhydride's case, they are not recentering and it's difficult to see how the optician can say she is happy with the fit.

Perhaps if auhydride takes a copy of this photo to the optician the next visit she will see that there is a problem outside her consulting room.

knotlob

Georgiaonmymind 04-16-2010 04:40 PM

Base Curve Question
 
Quote:

Originally Posted by Knotlob (Post 137445)
When I had my RGP lenses fitted, my optician measured the vertical and horizontal base curves on each eye. The horizontal and vertical base curves were averaged to give a single base curve, one for each eye. I have very flat corneas, but the optician was still able to fit the lenses OK. There should be some movement of the lens on the cornea when you blink, but the lens should self recentre very quickly - I don't even notice it moving. Large diameter corneas should not make a huge difference in fit, though maybe a larger diameter lens may be prescribed for aesthetic reasons/make the contact lens lens visible.

In auhydride's case, they are not recentering and it's difficult to see how the optician can say she is happy with the fit.

Perhaps if auhydride takes a copy of this photo to the optician the next visit she will see that there is a problem outside her consulting room.

knotlob

What do you think, knotlob? Would this "slippage" as illustrated above be due to a base curve that's too flat or too curved? Neither?

Knotlob 04-16-2010 05:14 PM

Quote:

Originally Posted by Georgiaonmymind (Post 137496)
What do you think, knotlob? Would this "slippage" as illustrated above be due to a base curve that's too flat or too curved? Neither?

I don't really know, but would think it is linked to a base curve, which is too shallow/too great. A base curve which is too tight might cause discomfort.

The other issue is the astigmatism, which may decentre the lens. Maybe a bitoric lens is required for better fit. But this is specialised and requires the optician to recheck, assuming they have the experience and competence.

knotlob

Knotlob 04-17-2010 06:17 AM

Quote:

Originally Posted by Knotlob (Post 137353)
Hello Auhydride

Is that photo one with the new lenses? The lens seems way off centre. I can barely see my lenses and they are centred at most times. But your photo shows the lens too low in my opinion.

I guess you should give the lenses a couple of days to settle down (since your optician is happy with the fit) but if things don't improve, then go back and tell the optician what symptoms you have, apart from the lens sitting low.

knotlob

A further thought on your RGP lenses Auhydride.

When I looked at my lenses again last night in the mirror, I did notice that my lens can go high or low when I blink, etc. When they are low, a bit like yours, I can't say I noticed any blurred vision, but it was night and I didn't have any far off objects to look at.

But, my lenses only did this when I was deliberately holding my eye lids open and they were not touching or over the lens. Under normal circumstances, my eye lids would be touching/overlapping the contact lens (per their design) and the lens would be closer to, if not bang on, centre.

You don't look like you are holding your eye lids open deliberately in the photo. Maybe in the optician's surgery, your eye lids are closed more and she cannot see the lens slip the way you show in the photo.

If you had a bigger diameter RGP lens, it would cover more of the pupil and would be more likely to be in contact or under the eyelid, so keeping the lens centred better. Also, a bigger diameter lens would probably give you sharper vision if it did move slightly off centre.

Just my musings just now :)

Please let us know how you get on though.

knotlob

Autonation 04-20-2010 12:01 PM

RGP Base Curves
 
Quote:

Originally Posted by Knotlob (Post 137501)
I don't really know, but would think it is linked to a base curve, which is too shallow/too great. A base curve which is too tight might cause discomfort.

The other issue is the astigmatism, which may decentre the lens. Maybe a bitoric lens is required for better fit. But this is specialised and requires the optician to recheck, assuming they have the experience and competence.

knotlob

I'm no expert either, but I would think that a contact lens with a base curve that was too shallow would slip more than one with too steep a curve. Any comments?

Knotlob 04-20-2010 04:57 PM

Quote:

Originally Posted by Autonation (Post 138130)
I'm no expert either, but I would think that a contact lens with a base curve that was too shallow would slip more than one with too steep a curve. Any comments?

Yes, I would think that a overly shallow (high base curve) RGP lens may slip. However, my optician adjusted the lens base curve based on my eye average base curve and the guidelines provided by the manufacturer to control/correct astigmatism. So it looks rather specialised.

knotlob

Trixie 04-21-2010 11:19 AM

Slippage
 
Quote:

Originally Posted by Knotlob (Post 138215)
Yes, I would think that a overly shallow (high base curve) RGP lens may slip. However, my optician adjusted the lens base curve based on my eye average base curve and the guidelines provided by the manufacturer to control/correct astigmatism. So it looks rather specialised.

knotlob

Great, knotlob. I was wondering about the slippage thing, too. Thank you.

Railfan 04-26-2010 11:27 AM

1 Attachment(s)
Quote:

Originally Posted by Knotlob (Post 138215)
Yes, I would think that a overly shallow (high base curve) RGP lens may slip. However, my optician adjusted the lens base curve based on my eye average base curve and the guidelines provided by the manufacturer to control/correct astigmatism. So it looks rather specialised.

knotlob

How do they measure for base curve anyway? I doubt the use a tape measure . . .

Knotlob 04-26-2010 03:22 PM

Quote:

Originally Posted by Railfan (Post 139114)
How do they measure for base curve anyway? I doubt the use a tape measure . . .

My optician used a thing called a keratometer. She measured the radius in vertical and horizontal directions, then averaged the two values.

The value she got was not the same value as she used for the RGP lenses. The manufacturers provide a guide as to the relation between the measured corneal radius and the contact lens base curve.

knotlob

dontblink 04-26-2010 04:39 PM

Keratometer
 
Quote:

Originally Posted by Knotlob (Post 139166)
My optician used a thing called a keratometer. She measured the radius in vertical and horizontal directions, then averaged the two values.

The value she got was not the same value as she used for the RGP lenses. The manufacturers provide a guide as to the relation between the measured corneal radius and the contact lens base curve.

knotlob

How does this keratometer work? Do they have to touch your eye to measure it? :eek:

Knotlob 04-26-2010 05:06 PM

Quote:

Originally Posted by dontblink (Post 139197)
How does this keratometer work? Do they have to touch your eye to measure it? :eek:

No it's non contact - possibly using a slit lamp. Totally painless.

knotlob

K-9 04-27-2010 09:53 AM

Keratometers 101
 
1 Attachment(s)
Quote:

Originally Posted by dontblink (Post 139197)
How does this keratometer work? Do they have to touch your eye to measure it? :eek:

I tried looking this up on Wikipedia, and here's part of the article. "A keratometer uses the relationship between object size (O), image size (I), the distance between the reflective surface and the object (d), and the radius of the reflective surface (R). If three of these variables are known (or fixed), the fourth can be calculated using the formula

R = 2dI/O

There are two distinct variants of determining R; Javal-Schiotz type keratometers have a fixed image size and are typically 'two position', whereas Bausch and Lomb type keratometers have a fixed object size and are usually 'one position'."

If I had to read much more of that I may have wound up sitting in the corner sucking my thumb.

This is a little more my speed:

"A keratometer is a medical instrument that eye care professionals use to measure the curvature and reflection of the anterior surface of the cornea. A keratometer, also sometimes called an ophthalmometer, is primarily used to diagnose the presence of astigmatism and to determine the degree and treatment of astigmatism."

It goes on to say "The modern keratometer uses optical sensors and computerized technology to measure comparisons and contrasts of the cornea against a predetermined value."

Below you can see a picture of what a keratometer looks like. It kind of looks like a telescope to me.

unclebuck 04-29-2010 12:04 PM

Contact Lens Centering Issues
 
Quote:

Originally Posted by Auhydride (Post 120821)
Hello
My doctor told me i should use RGP lenses because of my astigmatism and big size of my cornea.
I tried the lenses today, and did a small research on the topic before and unlike the information on this page:
http://www.eyetec.net/group7/images/m35ani2.gif

Would like to hear if there seem to be anything wrong.
Thanks

I looked at this animation and it looks like the contact lens lifts up when you blink, and then settles down to the center. That's not what happens in your case, though, right? For you when you blink the contact lens is centered when you open your eyes, but then sinks below center, right?

K-9 05-19-2010 03:27 PM

The Latest News
 
Quote:

Originally Posted by Auhydride (Post 137349)
hello again, thanks for the support.
So i got my lenses yesterday, I can't read anything, my vision is blurry, and every light source is like small fireworks.

Heres a photo.
http://img.photobucket.com/albums/v6...DSC_3894-1.jpg

What's going on Auhydride? Have you gotten re-fitted for your RGP lenses yet?

Auhydride 05-19-2010 03:50 PM

Hey thanks for everyone's messages.
I went to another doctor and got my lenses checked but he also said this is the best fitting I could have, while the correction rate was too low (about 0.5 off). He suggested using them for a month and getting them checked again if i still have non correction rate related problems. I'm waiting until my finals end.

Wheatgrass 05-19-2010 04:04 PM

An Alternative
 
Quote:

Originally Posted by Auhydride (Post 143006)
Hey thanks for everyone's messages.
I went to another doctor and got my lenses checked but he also said this is the best fitting I could have, while the correction rate was too low (about 0.5 off). He suggested using them for a month and getting them checked again if i still have non correction rate related problems. I'm waiting until my finals end.

Hi Auhydride,

I'm sorry to read that the contacts are still slipping.
I hate to say this on a website sponsored by a contact lens company, but do you think you'd be better off wearing glasses?

Autonation 06-03-2010 01:33 PM

Quote:

Originally Posted by Auhydride (Post 143006)
Hey thanks for everyone's messages.
I went to another doctor and got my lenses checked but he also said this is the best fitting I could have, while the correction rate was too low (about 0.5 off). He suggested using them for a month and getting them checked again if i still have non correction rate related problems. I'm waiting until my finals end.

Sorry to read about your contact lenses continuing to slip. At least now you have a second opinion. Please let us know if you find a way to keep those contacts from siding down or if you just get used to it. Sometimes that's all you can do.

Sevateem1 06-25-2010 02:05 PM

One Month Later . . .
 
Quote:

Originally Posted by Auhydride (Post 143006)
Hey thanks for everyone's messages.
I went to another doctor and got my lenses checked but he also said this is the best fitting I could have, while the correction rate was too low (about 0.5 off). He suggested using them for a month and getting them checked again if i still have non correction rate related problems. I'm waiting until my finals end.

It's been about a month now, Auhydride. What's the latest?

Joejoe 04-22-2011 01:31 PM

hey, this is an old thread, and im hoping you guys are still lurking around :D
im from England, and im pretty much having the same problem as the picture, im using specsavers, this is the second RGP im trying, and it was exactly the same as the last pair, the optician said he thought it was due to the lense weight becuase of my perscription and he will try thinner less weighted ones, this sounded odd to be but i went along with it anyway, and the second pair is no different, i was just enquiring for a little hope really... if i relax my eyes i cant function properly or see ect, if i squint and use the bottom lid to raise the lense on centre properly then its fine, but for obvious reasons, one cant stay like this all day, is the optician just incompetent? or is he going through the motion? hes not once mentioned shaping the lense differently so it cant slip, which i thought of that with my own mind before doing any research or such, which is just common sense? its really dis-heartening and nothing is ever simple to achieve... :/

rant over.. Joe :)

Anazak 04-22-2011 04:06 PM

Too Steep
 
Quote:

Originally Posted by Joejoe (Post 173687)
hey, this is an old thread, and im hoping you guys are still lurking around :D
im from England, and im pretty much having the same problem as the picture, im using specsavers, this is the second RGP im trying, and it was exactly the same as the last pair, the optician said he thought it was due to the lens weight because of my prescription and he will try thinner less weighted ones, this sounded odd to be but i went along with it anyway, and the second pair is no different, i was just inquiring for a little hope really... if i relax my eyes i cant function properly or see ect, if i squint and use the bottom lid to raise the lens on centre properly then its fine, but for obvious reasons, one cant stay like this all day, is the optician just incompetent? or is he going through the motion? hes not once mentioned shaping the lens differently so it cant slip, which i thought of that with my own mind before doing any research or such, which is just common sense? its really dis-heartening and nothing is ever simple to achieve... :/

rant over.. Joe :)

Hi Joejoe. Welcome aboard.

I don't know very much about fitting contact lenses, but I do know that they have a parameter called "base curve." The picture above makes me thing that the base curve of that lens might be too steep and instead of sitting quietly on your cornea, there's a gap and that allows the lens to slip down.
Imagine two bowls made of a rubbery material so they stick together. If they're the same size, they'll stick nicely. If you try to fit one of the bowls into another one that's too small, they won't fit together.
I couldn't find a picture to illustrate this principle, but when I did do a Google image search for "steep base curve" I saw a few pictures that look very much like the picture above with the off-center contact lens.

About this "lens weight" thing. Do you wear toric lenses, by any chance?

Auhydride 04-22-2011 04:48 PM

Hey, i'm still receiving emails when this thread gets bumped, so i'm here hehe

After doing a small research, I've came no lens fittings that were accepted as good while riding as low as mine.

This is about parameters of RGP lenses:
clsa.info/PDF/2Q_01p14-18.pdf

Seeing there are 6 parameters, with each having around 4 values, a rough guess of possible lens combinations is over 4000. Since every doctor i've went to tried no more than 2 pairs, I'm guessing that some of these parameters, that can make the lens fit better, were never tried.

I got examined by 3 doctors, none of them made any comments about the low riding lens, they fitted another pair that slide down exactly the same way, blaming the gravity for it and telling me they could make another order and just see the results.

And interesting read about lens fitting, what to do when
thevisioncareinstitute.co.uk/pdf/ECLP%20Chapter%206.PDF

Seeing how the whole problem looks really similar to what bad mechanical engineers have, (they don't model the problem, they order expensive parts, these expensive part's get custom made and can't be returned, and when they don't fit, based on how these part's didn't fit, a new order is made.) A quick search shows emerging cornea modeling techniques.

img.medscape.com/fullsize/migrated/508/288/cou508288.fig8.jpg

"Examples of virtual, on-the-screen contact lens fitting after myopic LASIK. With the tailor-made topographic data, the program suggests the best initial trial lens and shows the fluorescein pattern image at the slit-lamp examination. Notice the contact lens data on the top right and the graphical clearance on the bottom right of each image. By changing the contact lens data, numerous virtual trial fits can be visualized on the screen: top, left: corneal topography preoperative. Top, right: corneal topography post-LASIK. Middle, left: Preoperative suggested best fit. Middle, right: Postoperative suggested best fit. Bottom, left: Steep postoperative virtual fit with excessive tear pool. Bottom, right: Flat postoperative virtual fit with moderate peripheral clearance and extreme central corneal touch."

wikipedia.org/wiki/Corneal_topography

I just can't find an institute that has professionals that focus on RGP lenses and utilize modern tools.
So I'm waiting until I move to Europe.

rfknight 04-25-2011 10:35 AM

Quote:

Originally Posted by Joejoe (Post 173687)
hey, this is an old thread, and im hoping you guys are still lurking around :D
im from England, and im pretty much having the same problem as the picture, im using specsavers, this is the second RGP im trying, and it was exactly the same as the last pair, the optician said he thought it was due to the lense weight becuase of my perscription and he will try thinner less weighted ones, this sounded odd to be but i went along with it anyway, and the second pair is no different, i was just enquiring for a little hope really... if i relax my eyes i cant function properly or see ect, if i squint and use the bottom lid to raise the lense on centre properly then its fine, but for obvious reasons, one cant stay like this all day, is the optician just incompetent? or is he going through the motion? hes not once mentioned shaping the lense differently so it cant slip, which i thought of that with my own mind before doing any research or such, which is just common sense? its really dis-heartening and nothing is ever simple to achieve... :/

rant over.. Joe :)

Hi,

You're describing a loose fitting lens. Two things can be done to tighten a lens and make it stay centered on the cornea: increasing the diameter, steepening the base curve. An change in diameter of at least 0.3 mm is necessary to have any effect. The base curve needs to be changed by at least 0.50 diopters to have any effect.

I'm going to guess the diameter of your lenses is probably about right, so I would start with steepening the base curve.

I'm going to say making the lens thinner will not have much, if any, effect on the centering of the lens, and certainly not as much as steepening the base curve will.

I might mention, a simple method exists to correct this problem and that is by using trial lenses. You just keep trying lenses with different parameters until you find one that fits nicely, then you take an over refraction on that lens and you have the appropriate base curve, diameter, and power. However, trials lens sets are few and far between in practitioners offices.

RedeyeJedi 04-25-2011 12:30 PM

Is This Normal?
 
Quote:

Originally Posted by rfknight (Post 173777)
Hi,

You're describing a loose fitting lens. Two things can be done to tighten a lens and make it stay centered on the cornea: increasing the diameter, steepening the base curve.

Are you talking about modifying a lens you already have, or trading the lens for one with a larger diameter/steeper base curve?

Trixie 04-28-2011 04:31 PM

Quote:

Originally Posted by Joejoe (Post 173687)
hey, this is an old thread, and im hoping you guys are still lurking around :D
im from England, and im pretty much having the same problem as the picture, im using specsavers, this is the second RGP im trying, and it was exactly the same as the last pair, the optician said he thought it was due to the lense weight becuase of my perscription and he will try thinner less weighted ones, this sounded odd to be but i went along with it anyway, and the second pair is no different, i was just enquiring for a little hope really... if i relax my eyes i cant function properly or see ect, if i squint and use the bottom lid to raise the lense on centre properly then its fine, but for obvious reasons, one cant stay like this all day, is the optician just incompetent? or is he going through the motion? hes not once mentioned shaping the lense differently so it cant slip, which i thought of that with my own mind before doing any research or such, which is just common sense? its really dis-heartening and nothing is ever simple to achieve... :/

rant over.. Joe :)

Hi Joe. I'm sorry that you're dis-heartened. Have you found any helpful answers here?

Raj 05-04-2011 11:17 AM

Quote:

Originally Posted by Auhydride (Post 120821)
Hello
My doctor told me i should use RGP lenses because of my astigmatism and big size of my cornea.
I tried the lenses today, and did a small research on the topic before and unlike the information on this page:
My lenses does not center on my cornea at all, they rest at the bottom of the cornea, i can clearly see the edge of the lens and my vision was this:


And I could easily push my lower eyelid up to have much better vision.
I did share my concerns with my doctor, but she was happy with the lens' fitting and my first pair is on going to be ordered.
I don't know the brand or any similiar info.

Would like to hear if there seem to be anything wrong.
Thanks

Hey Auhydride,
Hello everyone. I have been using RGP contacts for a while.Over the period of it"s use I have ordered and tried 3 pairs of contacts in addition to a single contact for right eye.Similar to your contacts as seen from your pic,even my contacts rest at the bottom of the cornea rather their center being present right over pupil but I don"t see edges of my contacts anyway.As I kept trying new contacts my vision gradually improved, problem of blurred vision was solved as well but the kinda problem that you mention as each and every light source seems like a small fire cracker never reduced considerably and I'm still trying to manage with that as my optician says that these contacts fit me perfectly.Now I can easily reads book,newspapers etc and looking at white board,TV is not annoying anymore. I found out that I have a perfect vision in right eye and better in left with contacts on compared to specs,but it"s really annoying to look at any light source during night time.In broad daylight I feel pretty comfortable to look at things and this problem is hardly noticeable but while riding during night time it"s really difficult.
Recently I visited my optician and tried to explain her about my problems to which she replied that this problem may be because of glare and I should be using anti-reflective lenses while driving.Her reply was not at all convincing because the problem has got to do with contacts position rather than glare.She told me try to manage with those and visit her after a month and if still then problem is persistent she would be trying few more fittings and then order a new pair.As far as your problem with visual acuity and blurred vision is concerned I think you should try new fittings by visiting a good optician but coming to problem of looking at light source during night time is concerned even I am helpless.
I would be glad to know about your progress with this case.Have you finally found a solution to this or it"s still going the way it was.

Raj

Purpleiris 05-04-2011 11:41 AM

1 Attachment(s)
Quote:

Originally Posted by Auhydride (Post 137349)
hello again, thanks for the support.
So i got my lenses yesterday, I can't read anything, my vision is blurry, and every light source is like small fireworks.

Heres a photo.
http://img.photobucket.com/albums/v6...DSC_3894-1.jpg

I'm not an eye doctor, and even I can see that that lens isn't sitting right. This is how an RGP lens should look on the eye:

Alrysi 06-14-2011 11:38 AM

I was just wondering if the picture of your contact slipping was taken right after putting them in or later in the day? I noticed before reading this that my rgp lens was sitting even lower than yours, but today when I put them in they sit right where they should. So your lens may be fitting well when the doctor exams them. Just an idea..

Vita_man 06-14-2011 02:05 PM

Quote:

Originally Posted by Alrysi (Post 176901)
I was just wondering if the picture of your contact slipping was taken right after putting them in or later in the day? I noticed before reading this that my rgp lens was sitting even lower than yours, but today when I put them in they sit right where they should. So your lens may be fitting well when the doctor exams them. Just an idea..

So you think that Auhydride's contact lens may be slipping down as the day wears on?

Alrysi 06-14-2011 07:03 PM

I believe it maybe, yes.I am not sure how late in the day the picture was taken.Mine have done it and today I asked my doctor why this may be happening and he said that either I did not get the lens clean enough or it may be dry and to use rewetting drops..

HelpMeRhonda 06-17-2011 11:53 AM

Quote:

Originally Posted by Alrysi (Post 176962)
I believe it maybe, yes.I am not sure how late in the day the picture was taken.Mine have done it and today I asked my doctor why this may be happening and he said that either I did not get the lens clean enough or it may be dry and to use rewetting drops..

Do your contacts slip down in a few minutes, or do they gradually droop over a period of hours?

Alrysi 06-17-2011 01:27 PM

Rhonda, mine did it over a period of hours..I believe it was right not having the lens clean enough will do this as I have made sure to clean mine very well and have had no more problems.

Eyeofharmony 06-17-2011 01:30 PM

Quote:

Originally Posted by Alrysi (Post 177020)
Rhonda, mine did it over a period of hours..I believe it was right not having the lens clean enough will do this as I have made sure to clean mine very well and have had no more problems.

Terrific. I'm so glad to know that Lens 101 was helpful to you.

unclebuck 06-17-2011 03:20 PM

Quote:

Originally Posted by Alrysi (Post 177020)
Rhonda, mine did it over a period of hours..I believe it was right not having the lens clean enough will do this as I have made sure to clean mine very well and have had no more problems.

Keep those contacts clean, kids!

wolfts01 06-29-2011 05:33 PM

Hey, I just got RGP contacts for the first time myself in the last month or so, and I have the same problem. Mine don't ride quite as far down as Auhydride's, but they sit very low. I was Googling around trying to find someone with similar problems, and I felt I had to chime in.
According to my optometrist they fit fine, I'm just subconsciously half-blinking and pushing them down. I have tested this, and if I blink hard and hold my upper lids with my fingers they stay centered. I know everyone here is pursuing it as a "fitting problem", but your problems sound exactly like mine -- only your optometrists don't know/see the cause. Also, I can't see myself do the half blink no matter how hard I try, so you have to hold your lids to see if this is the cause.

I've had two checkups since getting them, and yesterday he said he would order smaller lenses with a steeper curve to attempt to fix the issue. He says the half-blinking is caused when your upper lid feels the lens on your eye and doesn't finish the blink. I suppose the theory behind the smaller lenses is that my eyes will be more closed before the lid hits the edge of the lens.

My only worries are that
(1) it doesn't work, or
(2) they are too small and I get terrible night vision all the time.

At any rate, I hope this helps everyone find the right solution. It sounds like a lot of optometrists don't see the cause behind this problem.

mamcita 06-30-2011 10:11 AM

Like a Garage Door?
 
Quote:

Originally Posted by wolfts01 (Post 177695)
I've had two checkups since getting them, and yesterday he said he would order smaller lenses with a steeper curve to attempt to fix the issue. He says the half-blinking is caused when your upper lid feels the lens on your eye and doesn't finish the blink.

To use a rather crude analogy, it's like an automatic garage door opener that starts to close, then it senses something in the way and reverses gear and opens up again. Is that what you're saying?

wolfts01 06-30-2011 02:13 PM

Quote:

Originally Posted by mamcita (Post 177709)
To use a rather crude analogy, it's like an automatic garage door opener that starts to close, then it senses something in the way and reverses gear and opens up again. Is that what you're saying?

That's how I understand it from his explanation. I've sat in front of the mirror trying to see it, and it is almost imperceptible (which makes sense, since normal blinking isn't perceived). I would imagine wearing them for a much longer period of time would get you desensitized to them, but then the habit might be set. I'll post an update when the new lenses get here to let everyone know if they work or not. I really hope this works or that the problem goes away, because I just can't go back to wearing glasses and I can't stand soft lenses.

mamabear1 06-30-2011 02:40 PM

Quote:

Originally Posted by wolfts01 (Post 177744)
That's how I understand it from his explanation. I've sat in front of the mirror trying to see it, and it is almost imperceptible (which makes sense, since normal blinking isn't perceived). I would imagine wearing them for a much longer period of time would get you desensitized to them, but then the habit might be set. I'll post an update when the new lenses get here to let everyone know if they work or not. I really hope this works or that the problem goes away, because I just can't go back to wearing glasses and I can't stand soft lenses.

We'll keep our fingers crossed, wolfts01. I hope to hear some good news from you soon.

wolfts01 07-07-2011 07:10 PM

Quote:

Originally Posted by mamabear1 (Post 177752)
We'll keep our fingers crossed, wolfts01. I hope to hear some good news from you soon.

Well, this is day one with the new lenses. I can say the effect of the half-blinking is much less on my vision, but the problem is still there. Every subconscious blink pushes the lenses down out of alignment. My right lens seems to ride much higher, but still not close to centered.

My original lens diameter was 9.4 (mm?), and the new lenses are 9.0mm. Not much of a change (imperceptible when I was handling them), but it does at least do something. I'm starting to wonder maybe if a larger lens is the solution (if the edge is above your resting upper lid, it won't "bounce" off of it during the blink). But my doctor is very good at his job, so I'm not about to self-diagnose anything yet.

I'll update again in a few days when I've had my checkup and see what he says.

dragongirl81 07-08-2011 10:39 AM

Quote:

Originally Posted by wolfts01 (Post 178181)
Well, this is day one with the new lenses. I can say the effect of the half-blinking is much less on my vision, but the problem is still there. Every subconscious blink pushes the lenses down out of alignment. My right lens seems to ride much higher, but still not close to centered.

My original lens diameter was 9.4 (mm?), and the new lenses are 9.0mm. Not much of a change (imperceptible when I was handling them), but it does at least do something. I'm starting to wonder maybe if a larger lens is the solution (if the edge is above your resting upper lid, it won't "bounce" off of it during the blink). But my doctor is very good at his job, so I'm not about to self-diagnose anything yet.

I'll update again in a few days when I've had my checkup and see what he says.

Well, it's good that you're seeing some improvement. You'll have to keep us posted.

Oh, and yes, contact lens diameters are measured in millimeters.

wolfts01 07-09-2011 03:24 PM

I just got back from my checkup exam. He thinks that they move much better than the previous lenses when I blink, so that is good. He wants to see me again in four weeks to see if the time helps.

He prescribed some OTC eye drops, Thera tears, to help with some irritation I'm having. I suppose wet lenses will move better, and it's technically preservative free. The Boston re-wetting drops I use now burn my eyes when I use them, so I end up going all day without using them more than once or twice.


Quote:

Originally Posted by dragongirl81 (Post 178221)
Well, it's good that you're seeing some improvement. You'll have to keep us posted.

Oh, and yes, contact lens diameters are measured in millimeters.

Thanks for the info. I'll update at least by the time of my next examination.

Klingons4Peace 07-11-2011 11:51 AM

Next Update in . . .
 
Quote:

Originally Posted by wolfts01 (Post 178299)
I just got back from my checkup exam. He thinks that they move much better than the previous lenses when I blink, so that is good. He wants to see me again in four weeks to see if the time helps.

He prescribed some OTC eye drops, Thera tears, to help with some irritation I'm having. I suppose wet lenses will move better, and it's technically preservative free. The Boston re-wetting drops I use now burn my eyes when I use them, so I end up going all day without using them more than once or twice.




Thanks for the info. I'll update at least by the time of my next examination.

When will you get your next exam so we'll know to expect your update?

dontblink 07-15-2011 03:30 PM

Quote:

Originally Posted by wolfts01 (Post 178299)
I just got back from my checkup exam. He thinks that they move much better than the previous lenses when I blink, so that is good. He wants to see me again in four weeks to see if the time helps.

He prescribed some OTC eye drops, Thera tears, to help with some irritation I'm having. I suppose wet lenses will move better, and it's technically preservative free. The Boston re-wetting drops I use now burn my eyes when I use them, so I end up going all day without using them more than once or twice.




Thanks for the info. I'll update at least by the time of my next examination.

We'll be looking forward to hearing from you again, wolfts01.

monte_krista 07-19-2011 08:46 AM

hi guys, i just started wearing lenses, and reading your posts made me think i have a problem with position of the lenses: they sit way too high. my doctor says their position is good, that my tears are fine, that i blink normally, and altogether, she says everything is as shoud be, but i have problems with blurriness. concerning the first image, the black one with two light spots, my vision has a trace not up and right, but down and right. i don't know what to do and whom to ask for help, because my optician claims the lens is positioned well, and i see it is not. HELP! i am at the brink of giving up, even though only lenses enable me clear and sharp vision. on the other hand, my sister has no problems with her vision now, even though her lenses are positioned low, as with the originator of this conversation, Auhydride. i really don't know what to do... i am desperate.

yournamehere 07-19-2011 09:02 AM

Quote:

Originally Posted by Auhydride (Post 173709)
Hey, i'm still receiving emails when this thread gets bumped, so i'm here hehe

After doing a small research, I've came no lens fittings that were accepted as good while riding as low as mine.

This is about parameters of RGP lenses:
clsa.info/PDF/2Q_01p14-18.pdf

Seeing there are 6 parameters, with each having around 4 values, a rough guess of possible lens combinations is over 4000. Since every doctor i've went to tried no more than 2 pairs, I'm guessing that some of these parameters, that can make the lens fit better, were never tried.

I got examined by 3 doctors, none of them made any comments about the low riding lens, they fitted another pair that slide down exactly the same way, blaming the gravity for it and telling me they could make another order and just see the results.

And interesting read about lens fitting, what to do when
thevisioncareinstitute.co.uk/pdf/ECLP%20Chapter%206.PDF

Seeing how the whole problem looks really similar to what bad mechanical engineers have, (they don't model the problem, they order expensive parts, these expensive part's get custom made and can't be returned, and when they don't fit, based on how these part's didn't fit, a new order is made.) A quick search shows emerging cornea modeling techniques.

img.medscape.com/fullsize/migrated/508/288/cou508288.fig8.jpg

"Examples of virtual, on-the-screen contact lens fitting after myopic LASIK. With the tailor-made topographic data, the program suggests the best initial trial lens and shows the fluorescein pattern image at the slit-lamp examination. Notice the contact lens data on the top right and the graphical clearance on the bottom right of each image. By changing the contact lens data, numerous virtual trial fits can be visualized on the screen: top, left: corneal topography preoperative. Top, right: corneal topography post-LASIK. Middle, left: Preoperative suggested best fit. Middle, right: Postoperative suggested best fit. Bottom, left: Steep postoperative virtual fit with excessive tear pool. Bottom, right: Flat postoperative virtual fit with moderate peripheral clearance and extreme central corneal touch."

wikipedia.org/wiki/Corneal_topography

I just can't find an institute that has professionals that focus on RGP lenses and utilize modern tools.
So I'm waiting until I move to Europe.

Okay, well, I'm sorry you feel like you have to move to a new continent in order to see properly, but no one can say that you didn't try.

Just one more question. About those six contact lens parameters you mentioned. I know of base curve, diameter, power, and (in the case of toric lenses), the cylinder and axis? That's five. For those of us who can't read PDF files, can you tell me what I'm missing?

Purpleiris 07-27-2011 03:44 PM

Six Parameters?
 
Quote:

Originally Posted by yournamehere (Post 178904)
Okay, well, I'm sorry you feel like you have to move to a new continent in order to see properly, but no one can say that you didn't try.

Just one more question. About those six contact lens parameters you mentioned. I know of base curve, diameter, power, and (in the case of toric lenses), the cylinder and axis. That's five. For those of us who can't read PDF files, can you tell me what I'm missing?

Six contact lens parameters? I thought there were only five, too.

1. Base curve
2. Diameter
3. Power
4. Cylinder
5. Axis

What did we miss?

HelpMeRhonda 08-01-2011 04:43 PM

Quote:

Originally Posted by monte_krista (Post 178903)
hi guys, i just started wearing lenses, and reading your posts made me think i have a problem with position of the lenses: they sit way too high. my doctor says their position is good, that my tears are fine, that i blink normally, and altogether, she says everything is as shoud be, but i have problems with blurriness. concerning the first image, the black one with two light spots, my vision has a trace not up and right, but down and right. i don't know what to do and whom to ask for help, because my optician claims the lens is positioned well, and i see it is not. HELP! i am at the brink of giving up, even though only lenses enable me clear and sharp vision. on the other hand, my sister has no problems with her vision now, even though her lenses are positioned low, as with the originator of this conversation, Auhydride. i really don't know what to do... i am desperate.

Have you gotten any help on this yet, monte_krista? I don't really know what to tell you other than to try and convince your eye doctor that you're really not seeing things as well as you'd like. It's possible that your vision is as good as it's going to get with contacts, but it wouldn't hurt to ask.

luvbostonxo2's 12-23-2011 03:20 AM

Quote:

Originally Posted by Georgiaonmymind (Post 137496)
What do you think, knotlob? Would this "slippage" as illustrated above be due to a base curve that's too flat or too curved? Neither?

its hard to say unless the lenses are observed under a slit lamp with fluorescein.

after a blink....your rgps should center within 2-3 seconds if they slip off center.....the fit needs to be corrected. Again its hard to say unless we know what your keratometry reading is and what base curve and diameter your fitted with.

Rgp's can be fitted flatter than K, or in alignement depending on your correction.

monte_krista 12-23-2011 07:27 AM

Quote:

Originally Posted by HelpMeRhonda (Post 180001)
Have you gotten any help on this yet, monte_krista? I don't really know what to tell you other than to try and convince your eye doctor that you're really not seeing things as well as you'd like. It's possible that your vision is as good as it's going to get with contacts, but it wouldn't hurt to ask.

no, i am still having a hard time with my lenses, even though i notice some improvement. i really don't get it. and i am using eye drops. the most significant change is that i no longer feel my lenses while wearing them, which is great (i stopped feeling them like 4 months ago), which is a great relief. but the blurriness is still there, more or less. when i am outside, my vision is just perfect, but indoors it takes me a while for my eyes to get used to the surrounding. but if the air is stale, my lenses are very uncomfortable to wear, itchy and dry and awful.

monte_krista 12-23-2011 07:30 AM

Quote:

Originally Posted by HelpMeRhonda (Post 180001)
Have you gotten any help on this yet, monte_krista? I don't really know what to tell you other than to try and convince your eye doctor that you're really not seeing things as well as you'd like. It's possible that your vision is as good as it's going to get with contacts, but it wouldn't hurt to ask.

no, i am still having a hard time with my lenses, even though i notice some improvement. i really don't get it. and i am using eye drops. the most significant change is that i no longer feel my lenses while wearing them, which is great (i stopped feeling them like 4 months ago), which is a great relief. but the blurriness is still there, more or less. when i am outside, my vision is just perfect, but indoors it takes me a while for my eyes to get used to the surrounding. but if the air is stale, my lenses are very uncomfortable to wear, itchy and dry and awful.my doctor just says i should use eye drops.

oingoboingo 12-23-2011 10:14 AM

Quote:

Originally Posted by monte_krista (Post 197360)
no, i am still having a hard time with my lenses, even though i notice some improvement. i really don't get it. and i am using eye drops. the most significant change is that i no longer feel my lenses while wearing them, which is great (i stopped feeling them like 4 months ago), which is a great relief. but the blurriness is still there, more or less. when i am outside, my vision is just perfect, but indoors it takes me a while for my eyes to get used to the surrounding. but if the air is stale, my lenses are very uncomfortable to wear, itchy and dry and awful.my doctor just says i should use eye drops.

When you say that you can see perfectly when you're outside, but not indoors, that tells me it's got something to do with your pupils getting bigger in dim light. Can you see okay outside if it's cloudy or dark?

monte_krista 12-23-2011 12:32 PM

Quote:

Originally Posted by oingoboingo (Post 197367)
When you say that you can see perfectly when you're outside, but not indoors, that tells me it's got something to do with your pupils getting bigger in dim light. Can you see okay outside if it's cloudy or dark?

i'm okay when it's cloudy, but there are some light reflections when it's dark. but in general, i think i'm okay even if it's dark.

Autonation 12-23-2011 01:09 PM

Quote:

Originally Posted by monte_krista (Post 178903)
hi guys, i just started wearing lenses, and reading your posts made me think i have a problem with position of the lenses: they sit way too high. my doctor says their position is good, that my tears are fine, that i blink normally, and altogether, she says everything is as should be, but i have problems with blurriness. concerning the first image, the black one with two light spots, my vision has a trace not up and right, but down and right. i don't know what to do and whom to ask for help, because my optician claims the lens is positioned well, and i see it is not. HELP! i am at the brink of giving up, even though only lenses enable me clear and sharp vision. on the other hand, my sister has no problems with her vision now, even though her lenses are positioned low, as with the originator of this conversation, Auhydride. i really don't know what to do... i am desperate.

Hi monte_krista. If your eye doctor says that your lenses are positioned properly and yet your vision is still not satisfactory, maybe something else is going on. Has your eye doctor said anything like "I don't understand it, your contact lenses are positioned properly but you still see that blur"? If not, maybe you can ask her what else can explain the blur you're seeing.

luvbostonxo2's 12-23-2011 01:40 PM

Quote:

Originally Posted by Auhydride (Post 120821)
Hello
My doctor told me i should use RGP lenses because of my astigmatism and big size of my cornea.
I tried the lenses today, and did a small research on the topic before and unlike the information on this page:
http://www.eyetec.net/group7/images/m35ani2.gif

http://www.eyetec.net/group7/M35S1.htm
My lenses does not center on my cornea at all, they rest at the bottom of the cornea, i can clearly see the edge of the lens and my vision was this:

http://img.photobucket.com/albums/v636/ni-mh/vision.jpg

And I could easily push my lower eyelid up to have much better vision.
I did share my concerns with my doctor, but she was happy with the lens' fitting and my first pair is on going to be ordered.
I don't know the brand or any similiar info.

Would like to hear if there seem to be anything wrong.
Thanks

do you have a prism ballast on your lenses? Do you know if you ecp ordered your lenses with a prism ballast to stabilize your toric power?

if you do have PB....then you need larger diameter rgps to prevent slippage and dropping below center.

luvbostonxo2's 12-23-2011 01:43 PM

Quote:

Originally Posted by Purpleiris (Post 174463)
I'm not an eye doctor, and even I can see that that lens isn't sitting right. This is how an RGP lens should look on the eye:

agreed....its sitting too low and has shifted off axis....i can tell that from your pic!

larger diameter and a wider optic zone will correct this issue.

monte_krista 12-23-2011 04:41 PM

Quote:

Originally Posted by Autonation (Post 197400)
Hi monte_krista. If your eye doctor says that your lenses are positioned properly and yet your vision is still not satisfactory, maybe something else is going on. Has your eye doctor said anything like "I don't understand it, your contact lenses are positioned properly but you still see that blur"? If not, maybe you can ask her what else can explain the blur you're seeing.

she keeps claiming it's normal.

oingoboingo 12-27-2011 03:30 PM

Quote:

Originally Posted by monte_krista (Post 197421)
she keeps claiming it's normal.

Maybe she has a funny idea of what's "normal." Maybe you can ask her about a different lens that doesn't "normally" behave like that.

monte_krista 12-27-2011 04:43 PM

Quote:

Originally Posted by oingoboingo (Post 197502)
Maybe she has a funny idea of what's "normal." Maybe you can ask her about a different lens that doesn't "normally" behave like that.

guess so. well, i don't care. the issue may be my family history in lack of tears and problems with eyes and vision in general.

3scompany 12-27-2011 05:42 PM

Quote:

Originally Posted by monte_krista (Post 197522)
guess so. well, i don't care. the issue may be my family history in lack of tears and problems with eyes and vision in general.

What is it you don't care about? In your first post in this thread you said that your contact lenses were sitting too high and causing blur. You even said "HELP" in capital letters like that. Have you given up on having contact lenses that are centered properly? Have we failed you here on Lens 101?

monte_krista 12-27-2011 06:08 PM

Quote:

Originally Posted by 3scompany (Post 197539)
What is it you don't care about? In your first post in this thread you said that your contact lenses were sitting too high and causing blur. You even said "HELP" in capital letters like that. Have you given up on having contact lenses that are centered properly? Have we failed you here on Lens 101?

no, no, everything is okay. nobody failed me. i just can't go on arguing with the crazy doctor. i am still using my lenses, and i will, as long as they provide me with better vision, and will continue hoping that the blurriness that disappears from time to time will one day disappear for ever. no giving up this time.

Tonythetiger 12-28-2011 10:58 AM

Quote:

Originally Posted by monte_krista (Post 197545)
no, no, everything is okay. nobody failed me. i just can't go on arguing with the crazy doctor. i am still using my lenses, and i will, as long as they provide me with better vision, and will continue hoping that the blurriness that disappears from time to time will one day disappear for ever. no giving up this time.

I'm glad that Lens 101 at least hasn't let you down. What do you think about looking for another doctor who isn't crazy?

Georgiaonmymind 12-30-2011 01:15 PM

Find a Sane One
 
Quote:

Originally Posted by Tonythetiger (Post 197574)
What do you think about looking for another doctor who isn't crazy?

That would be my recommendation . . .

unclebuck 02-02-2012 05:29 PM

Quote:

Originally Posted by monte_krista (Post 197545)
no, no, everything is okay. nobody failed me. i just can't go on arguing with the crazy doctor. i am still using my lenses, and i will, as long as they provide me with better vision, and will continue hoping that the blurriness that disappears from time to time will one day disappear for ever. no giving up this time.

I hope you will continue to check back with Lens 101 and tell us how you're doing. Okay, monte_krista of the Royal Blue text?

deankap17 02-18-2013 04:55 PM

too flat?
 
I am an optometrist, and this lens does indeed look low (obviously), but sometimes can still be "normal" if the vision is acceptable and stable, (which it seems it isn't).... Because of this patient's complaints of blurred vision out of that eye, I would definitely try a steeper BC or a larger DIA to try and raise this lens more centrally. Another question I have is what is the Spectacle Rx? Many soft contact lenses these days are able to accommodate even -2.75 D of astigmatism.......Hopefully this patient is now in a better place!

Klingons4Peace 02-22-2013 12:53 PM

Quote:

Originally Posted by Auhydride (Post 173709)
Seeing how the whole problem looks really similar to what bad mechanical engineers have, (they don't model the problem, they order expensive parts, these expensive part's get custom made and can't be returned, and when they don't fit, based on how these part's didn't fit, a new order is made.) A quick search shows emerging cornea modeling techniques.

I just can't find an institute that has professionals that focus on RGP lenses and utilize modern tools.
So I'm waiting until I move to Europe.

Ya gotta love the mechanical engineers.

Hey, keep in touch with us in Europe, okay? They have Internet there, right? :p


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