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A member asked:
Why is it that when you squint your eyes you can see clearer?
6 doctors weighed in across 2 answers
Squinting: You can see better when you're squinting because you're slightly changing the shape of your corneas much like eyeglasses refract or bend the light waves to your retina to focus them.
Answered 9/28/2016
6.2k views
Pinhole effect: Squinting acts like a pinhole, forcing light through a small region of the eye. This lets only the straightest rays of light enter the eye; they do not get bent off alignment by irregular curves (astigmatism) or length (nearsighted or farsighted) of the eye. Squinting does not appreciably change the cornea's shape; the force of the eyelids is evenly distributed over the eye, especially the sclera.
Answered 8/16/2012
6.2k views
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