why do you see better when you squint?

Question

And why is squinting bad for your eyes if it helps you see better?

In: 73

Answer 1

Hmm. Here’s the right answer: The lens in your eye works with the cornea to focus light onto the back of your eyeball. This light comes from all directions. But sometimes these two items aren’t perfect (or your eyeball is a weird shape) and the light coming in is bent in the wrong way and isn’t focussed on the back of the eye, which is why some people need glasses.

Why does squinting work? Because by almost completely closing your eyes you only let light in from straight ahead. That goes right through the middle of the lens and doesn’t need to be focussed, so it’s always sharp.

You can get the same effect by looking through a pinhole or drinking straw.