system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does squinting work?

To an extent.
gpt
When you squint you cut off the top and bottom edges of your pupil, making your pupil closer to a pin hole camera. The smaller the hole, the sharper the image, regardless of the shape of the eye or the shape of the lens. The trade off though, is that the image is dimmer.