system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it that when a nearsighted blurry vision becomes clear when looking through a very small hole cutout?
gpt
The problem is that the light is spread out too much rather then being properly focused. Corrective lenses fix this by focusing the light onto a smaller area. A pinhole effectively accomplishes the same, albeit at the obvious cost of field of view.