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I found this video clip where an optician takes a giant contact lens and shows you what it looks like inside out. It's pretty cool.
http://www.ehow.com/video_4431442_tell-contact-lens-inside-out.html |
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It seems that when you put them in backwards you would be able to tell. If they aren't a perfect bowl shape when you are putting them in, they are backwards. When I put mine in backwards, I know it right away.
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Here's a picture that I believe I've seen on Lens 101 before. It shows the difference between a "normal" contact lens and one that's inside out.
Many contact lenses have what they call an "inversion mark." It usually says "123" or something profound like that. If the numbers and/or letters are backward, then you know your contacts are inside out. |
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It's strange. I tried doing a Google search for "1 Day Acuvue inversion mark" and found all kinds of weird stuff, but not one picture of this mark on the contact lenses. Maybe someone who wears these lenses can put up a picture of an inversion mark for us so we can see what it looks like. Anyone? |
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Are they "barely noticeable on the eye"? Do they "fit your lifestyle?" |
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The tint is so pale , no one will notice it anyway when you are wearing the lens. knotlob |
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So how can you tell that your contacts are right side out without an inversion mark? Do you do that "bowl" thing where you just look at the shape of the lens?
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knotlob |
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See post #7 for pictures of that "bowl" thing and you too can spot an inside out lens in a second.
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Put the lens on the end of your index finger and with your other hands finger and thumb try and gently squash the lens from each side.. If it rolls together a bit like a taco shell thats the right way ~~> (_) If it rolls outwards against itself then thats the wrong way ~~> )_( Hope that helps anyone struggling to tell the difference. |
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Probably by their shape, as seen in post #7 above.
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I've not tried the taco shell test, and if there's an inversion mark on Focus Daily, I'm blowed if I can see it!
I also can't see any in the bowl shape of the lens on the end of my finger, whether its inside out or not. What I've found is that the lens is virtually always the right way round in the packet. Here's what I mean: Most times, the lens is concave side up in the packet, and that upward concave side is the side that sits against your eye. Occasionally, the lens has got flipped pancake-fashion inside the pack, so that it's concave-side down. But it will almost never have turned inside out. So for me, I fit the lens to my eye whichever way it comes out of the pack, turning it over if necessary, but not turning it inside-out, or outside-in. On those very rare occasions when it may have turned itself inside-out, I can tell within a few minutes of putting it in that something ain't right, and fix it. Now, putting the right eye's lens in the left eye and vice versa... that's a whole different kind of wrong! |
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How does it feel? Is it a horrible sensation you'd prefer to avoid by checking the lenses before you put them in? Judging by your description, it doesn't sound all that bad. Maybe comparable to putting your shoe on the wrong foot? You know right away that something's not right, but you're not exactly howling in pain. |
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Like those above I find my Focus Dailies look IDENTICAL inside out or correct way around. It would be great if they had an inversion marker of some kind. I find the suggestion of putting them in and seeing if it feels horrible to be not 100% helpful!!
The "Taco shell" method as suggested by "Mixa" is brilliant, but I hve one slight change. With my lenses, when they are the correct way around, the lens does indeed roll around into a taco, forming an O shape. When it is inside out, it doesn't "roll outwards" (a )_( shape as suggested above) in my experience, but rahter just rolls flat (like a U or || shape). Either way, Taco is good, flat/outside/no taco is bad! Thanks! -c |
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I realize that as a newbie you won't be able to post pictures for a while, but I was wondering if maybe you can insert the website of a picture that might make your explanation a bit clearer. I'm a little confused by your "rolling outwards" and "rolls flat" descriptions. |
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It might be easier too if we agree on what a taco shell looks like. It's shaped like the letter "U." (While searching for this picture, looking at all those beautifully crafted tacos made me hungry. I think I'll Make a Run For the Border. Anybody want anything?) |
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And like this when inside out )_( Maybe it depends on the thickness and prescription as to how they fold. Both mine are -150 And how you fold them, I put mine on my index finger tip and squeeze it with my other hands finger and thumb from as low down as possible. Some people place it on the palm just below the little finger and use one of the natural creases in the hand to roll the lens by gently closing the hand a little. Mixa |
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Thanks for your help oingoboingo. I probably should have recapped that post myself.
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Mixa |
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Mixa |
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Oh well. I don't imagine that these lenses invert very often, so it's not a big issue as far as I know. |
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As I've worn lenses for longer, I've become less sensitive to this feeling, so that sometimes I've had a lens in inside-out for some hours before I realise there's something wrong. I think the strength of the feeling may be related to the thickness of the lens: I'm much more aware of my -6.50 lens being inside-out than I am of the -5 lens. (There you go; you know my prescription. How intimate is that!?) |
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Thanks for sharing your contact lens experiences, and your prescription. Quite a few people have shared that information here, so I guess we're a pretty tight group. |
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I guess you watch a lot of BBC, don't you, Ace?
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I'm not sure about being a member. I just live here! |
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Are you familiar with these items? You might a British if you can define: A letterbox A crumpet A jumper A bonnet A snooker table Finally, do you know the words to "God Save the Queen"? Carry on. |
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A letterbox. That's what you'd call a mailbox. But we make our postmen (mailmen, letter carriers) work a bit harder than yours: a letterbox is usually a slot in the front door, so we don't have to go outside in our pyjamas to collect our mail.
A crumpet. I had one for breakfast this morning. I have no idea how they're made (they're sort of bread-y), but one usually toasts them and has them with honey or butter. Or both. (See also totty, skirt etc for an alternative meaning). A jumper. Sweater, pullover. A usually woolly garment you put on by pulling it over your head. They often make you itch. A bonnet. Usually, that's the bit of a car that has the engine under it. It can also be something you wear on your head if you're Scottish or into historical costumes, or the thing you put on a polishing machine. A snooker table? Isn't that obvious? It's where you play snooker. Don't tell me you folks don't know what snooker is?! (Sigh). It's like pool, only with more balls, a bigger table and much, much more skill and patience. God save our noble queen Long live our gracious queen God save the queen Send her victorious Happy and glorious Long to reign over us (what an apalling rhyme that one is). God save the queen. (There are some other verses, but I bet even the Queen doesn't know them). So, do I get to keep my burgundy passport with the portcullis on the front? |
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You know, the thing I really love about this forum is hearing from people in other countries. Now, if I remember correctly, our "My Country `tis of Thee" is sung to the tune of "God Save the Queen," isn't it? I seem to remember a skit on "The Two Ronnies" where one of them (I think it was Ronnie) led the audience in a song and he said it was sung to the tune of "God Save the Queen" and I remember thinking "That's 'My Country `tis of Thee' isn't it?" Speaking of appalling rhymes, have you heard "Amanda" by Boston? I'm gonna take you by surprise And make you realize, Amanda I'm gonna tell you right away, I can't wait another day, Amanda I'm gonna say it like a man And make you understand, Amanda I love you Sheesh. |
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Someone put a link to this thread in a post for me. I was glad to read what was posted, and I don't use Focus Dailies, but have the same problem with Accuvue Oasys
Have been told by a couple of people that the "cup shape" or bowl isn't "as obvious on the newer lens as the older Bausch & Lombe" I don't exactly know what that means, because I'm new to Contacts, just one week now. About having them in, (inside out): Every single day when I've inserted them I have never felt the slightest discomfort, yet I know I could not have gotten them right every time. Last night after taking one out I looked for the Inversion Mark (which is on a surprising number of lens by different makers, since I found a website & called an 800 number about it). I just do not have good enough closeup vision to be able to see that mark, also, the bowl or cup shape just isn't so clear to me. Last night that lens was flipping around like a live animal after I got it out. Does this happen more when the lens is dry? |
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"Are my contacts inside out?" "Well, look and see if they have that flared edge thing going on." "Okay . . . um, I can't see the contact lens without my contact lenses in." Would a magnifying glass help? |
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If only I could show you this brand, you might understand it is probably (from what others have told me) not as obvious. Also my inexperience is probably a lot to blame ![]() I'm going to just read the forum for a while, because I do have confidence that I will be able to do this, but it's going to take practice, and as I said I haven't felt uncomfortable in my eyes once yet since I started using them. |
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Okay, so sit back, relax and see if you can answer someone else's question on this forum. It's fun to do that.
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As a followup to these posts, I discovered yet another day to tell if a (tinted) lens is in its proper position, or got flipped.
Found a website and it lists all the telltale signs above, but it also says that if your lens is tinted, the tint will be obvious and visible when you have it "right side out" but if it got accidentally inverted, the color of the tint will not be so visible, or even look like it has no tint at all around the edges. That helped me, along with all the helpful posts here. I clicked a link here, which has a video and the video stops at a certain point, won't advance. Maybe there are some videos on YouTube about this also. Might check up on that. Thanks everyone ![]() |
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Yes, it probably would be better to recognize an inverted contact lens right away just by looking at it so you don't even have to fold it.
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Did you get distracted like I always do on that site? |
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That's the beauty of this site. There's no telling how many people can benefit from your one post.
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That's very true, Dragonslayer. We've got over 50 posts in this thread already.
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