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A member asked:
Why does your vision improve when you squint?
A doctor has provided 1 answer
Pinhole effect: The light rays that enter the eye through the exact center do not need to be bent (or refracted) to focus. By limiting the light entering the eye by a pinhole or squinting, you maximize this. Btw if squinting helps, you need glasses.
Answered 1/25/2013
5.3k views
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