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monitron
on Sept 1, 2021
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Man can change his pupil size on command
Whoa. I had no idea. Thanks for informing me! That's so weird. I had always assumed that the curved front surface of the eye
was
the lens.
uj8efdkjfdshf
on Sept 1, 2021
[–]
You're not wrong - the cornea (front of the eye) has about 3x the refractive power of the lens. Both function as converging lenses, and the only difference is that the refractive power of the lens can be changed.
SomeHacker44
on Sept 1, 2021
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parent
[–]
...until age 45 to 50ish, when the lens hardens into a focus close to infinity and you start to need reading glasses. (presbyopia)
Consider applying for YC's Spring batch! Applications are open till Feb 11.
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