system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Can you actually go blind from looking at a solar eclipse with out proper eye protection? why?
gpt
Your pupils get large because the light levels are low, but it's still giving you a lot of UV light.  Your pupils would normally get smaller to protect you from such a thing, but the eclipse fools this mechanism.

You absolutely can go blind, or at least have seriously damaged eyesight from retinal damage caused by ultraviolet light.  Don't ever do that, seriously.  Don't look directly at the sun, and never during an eclipse.