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Prism Contact Lenses

This is a discussion on Prism Contact Lenses within the Other Contact Lenses forums; Have you ever heard of contact lenses with prisms?...


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  #1 (permalink)  
Old 09-22-2008, 03:16 PM
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Default Prism Contact Lenses

Have you ever heard of contact lenses with prisms?
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  #2 (permalink)  
Old 04-21-2011, 11:10 AM
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Default Prismatic Contact Lenses

Quote:
Originally Posted by Ynot View Post
Have you ever heard of contact lenses with prisms?
Yes I have, right here in this forum . . . but not too much any place else.

http://www.lens101.com/other-contact-lenses/18675-contact-lenses-prisms.html
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  #3 (permalink)  
Old 06-30-2011, 04:35 PM
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According to that link up there, prism contact lenses help people who have double vision. The punch line is this: "In fact, some kinds of prism are corrected better by contact lenses than by glasses!"
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  #4 (permalink)  
Old 07-29-2011, 10:14 AM
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Default Keep in Quiet

Quote:
Originally Posted by John316 View Post
According to that link up there, prism contact lenses help people who have double vision. The punch line is this: "In fact, some kinds of prism are corrected better by contact lenses than by glasses!"
Don't let the glasses people year you say that. They've got enough problems.
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  #5 (permalink)  
Old 08-06-2011, 08:21 AM
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Yes i have heard of those.

But they don't have Anything to do with double vision. Prisms in glasses can help if you have double vision. In contacts they cant. They are only used to center the contact correctly.
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  #6 (permalink)  
Old 08-06-2011, 11:33 AM
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in order to correct double-vision, prisms must be opposite bases for each eye. If the prism in one eye is Base down, then the other must be Base up. In CLs, the prism is 'prism ballast' . This is used on toric lenses to try and maintain the cyl correction at the required angle.
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  #7 (permalink)  
Old 08-08-2011, 10:49 AM
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Quote:
Originally Posted by Contact Lens Fitter View Post
in order to correct double-vision, prisms must be opposite bases for each eye. If the prism in one eye is Base down, then the other must be Base up. In CLs, the prism is 'prism ballast' . This is used on toric lenses to try and maintain the cyl correction at the required angle.
So prism contact lenses can help those with double vision?
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  #8 (permalink)  
Old 08-08-2011, 02:11 PM
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No. Only eyeglasses can correct this type of problem.
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Old 08-08-2011, 03:20 PM
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Quote:
Originally Posted by Contact Lens Fitter View Post
No. Only eyeglasses can correct this type of problem.
So that "prism ballast" thing you mentioned can't correct double vision then, right?
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  #10 (permalink)  
Old 08-08-2011, 07:43 PM
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Quote:
Originally Posted by KITT View Post
So that "prism ballast" thing you mentioned can't correct double vision then, right?
No, it's only to keep the lens from rotating off its axis.
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  #11 (permalink)  
Old 08-09-2011, 10:31 AM
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Default I Get It Now

Quote:
Originally Posted by Contact Lens Fitter View Post
No, it's only to keep the lens from rotating off its axis.
Good question, KITT. I think I finally understand. Thank you for your patience, contact lens Fitter.
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  #12 (permalink)  
Old 08-19-2011, 02:30 PM
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Quote:
Originally Posted by Deepurple View Post
Good question, KITT. I think I finally understand. Thank you for your patience, Contact Lens Fitter.
Okay. Everybody got that? Prisms "only . . . keep the lens from rotating off its axis." Contact lens prism ballasts "don't have anything to do with double vision."
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  #13 (permalink)  
Old 08-23-2011, 03:23 PM
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Quote:
Originally Posted by John316 View Post
Okay. Everybody got that? Prisms "only . . . keep the lens from rotating off its axis." Contact lens prism ballasts "don't have anything to do with double vision."
Nice summary, John. Thanks.
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  #14 (permalink)  
Old 09-16-2011, 03:55 PM
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Quote:
Originally Posted by John316 View Post
Okay. Everybody got that? Prisms "only . . . keep the lens from rotating off its axis." Contact lens prism ballasts "don't have anything to do with double vision."
Thanks for putting the pieces together for us, John316.
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  #15 (permalink)  
Old 09-27-2011, 11:29 AM
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Default Eyeglasses Only For Double Vision

Quote:
Originally Posted by Contact Lens Fitter View Post
No. Only eyeglasses can correct this type of problem.
That's good to know. Thank you.
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  #16 (permalink)  
Old 11-08-2011, 05:14 PM
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Quote:
Originally Posted by Contact Lens Fitter View Post
No. Only eyeglasses can correct this type of problem.
For for those of us with double vision (and I'm thankful I'm not one of them) contact lenses are just not an option then, right?

I think we've got this prism thing figured out finally.
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  #17 (permalink)  
Old 01-04-2012, 03:53 PM
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Default So Far, So Good

Quote:
Originally Posted by Brittvid View Post
For for those of us with double vision (and I'm thankful I'm not one of them) contact lenses are just not an option then, right?

I think we've got this prism thing figured out finally.
Well, no one has rushed in to correct you yet . . .
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Old 01-19-2012, 04:56 PM
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Quote:
Originally Posted by John316 View Post
Well, no one has rushed in to correct you yet . . .
That's always a relief.
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  #19 (permalink)  
Old 01-20-2012, 12:10 PM
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Default Contact Lenses for Diplopia

Quote:
Originally Posted by Brittvid View Post
For for those of us with double vision (and I'm thankful I'm not one of them) contact lenses are just not an option then, right?
Intelihealth.com says Treating double vision depends on its cause. For example, people with astigmatism that causes double vision can wear special contact lenses. Sometimes, simply updating your prescription eyeglasses takes care of the problem. Surgery is used to treat cataracts and pterygium, and surgery on the eye muscles can treat certain types of double vision. Often, adjustable stitches are used so that the position of the eyes can be fine-tuned a few hours after the surgery. That way, the patient is alert for the adjustment and can report whether the double vision is gone. Prisms also may be used in the glasses to fine-tune the surgery by moving the image seen with one eye to coincide with the other eye.
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  #20 (permalink)  
Old 01-27-2012, 12:54 PM
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Quote:
Originally Posted by JTKirk View Post
Intelihealth.com says Treating double vision depends on its cause. For example, people with astigmatism that causes double vision can wear special contact lenses.
As an aside, notice that the article calls it "astigmatism," not "an astigmatism." It doesn't say "people with an astigmatism."

Read and learn.
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  #21 (permalink)  
Old 02-10-2012, 03:58 PM
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Quote:
Originally Posted by KITT View Post
As an aside, notice that the article calls it "astigmatism," not "an astigmatism." It doesn't say "people with an astigmatism."

Read and learn.
Thanks for pointing that out, KITT. I know it's a small thing, but it kind of gets to me as well.

Never mind the fact that I didn't know that toric lenses are for people with astigmatism before I found this website. Thank you, Lens 101!
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  #22 (permalink)  
Old 02-10-2012, 04:16 PM
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Quote:
Originally Posted by ICU2 View Post
Yes I have, right here in this forum . . . but not too much any place else.

http://www.lens101.com/other-contact-lenses/18675-contact-lenses-prisms.html
Thanks for the link, ICU2.
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  #23 (permalink)  
Old 02-14-2012, 02:53 PM
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Default

Quote:
Originally Posted by JTKirk View Post
Intelihealth.com says Treating double vision depends on its cause. For example, people with astigmatism that causes double vision can wear special contact lenses. Sometimes, simply updating your prescription eyeglasses takes care of the problem. Surgery is used to treat cataracts and pterygium, and surgery on the eye muscles can treat certain types of double vision. Often, adjustable stitches are used so that the position of the eyes can be fine-tuned a few hours after the surgery. That way, the patient is alert for the adjustment and can report whether the double vision is gone. Prisms also may be used in the glasses to fine-tune the surgery by moving the image seen with one eye to coincide with the other eye.
I guess special contact lenses are an option for people with double vision, depending on what type of double vision is involved, right?
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  #24 (permalink)  
Old 05-02-2012, 09:30 AM
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Quote:
Originally Posted by Spicegurl View Post
I guess special contact lenses are an option for people with double vision, depending on what type of double vision is involved, right?
This is what we're saying.
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