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Wednesday, November 30
Critical eye
When I first got my contact lenses many months back, for a long time I absolutely could not tell if they were "the right way" or inside-out. The lenses haven't changed. I still can't really look at a lens and tell you if it's inverted or not most of the time. The difference is that I just kind of intuitively know now. My perception has somehow changed to be able to identify the state of a contact lens, even though I can't really consciously tell the difference most of the time.
3 comments:
said:
when inside-out, the edge flares out slightly, when rightside-in the curvature of the lens at the edge is maintained. This edge can be felt, making the lens slightly less comfortable, which I suspect is your intuition saying: "hey dipshit, your contact lens is in backward".
Larry said:
Or if you wear Acuvue 2 lenses like I do, the small "123" printed on the lens guarantees that you can't screw it up. :)
Acuvue 2s are supposed to be put in your eyes in such a way that, if the "123" were large enough and in a darker color that didn't match the white of your eyes, it could be read correctly (i.e., not backward) by another person taking a close look at your eye. (That is, if you hold it up to a light and the "123" appears backwards to you, the side nearer to you is the one that goes on the surface of your eye.)
Acuvue 2s are supposed to be put in your eyes in such a way that, if the "123" were large enough and in a darker color that didn't match the white of your eyes, it could be read correctly (i.e., not backward) by another person taking a close look at your eye. (That is, if you hold it up to a light and the "123" appears backwards to you, the side nearer to you is the one that goes on the surface of your eye.)
Travis said:
Well, yeah, I can definitely feel it once it's in backwards. The difference is that I know when it's inverted before putting it in my eye, despite the fact that I can't really see the lens clearly, especially without my glasses on. Consciously, most of the time I can't tell the difference just by staring.
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