But also, spending lots of time in full sunlight seems to be protective against nearsightedness
I’m curious about that. I suspect something like “I’d guess it’s because being lots in sun means you’re staring way less on tiny things very close to you not because UV is good for eyes” but I’m curious why you think this is case in the first place
Thank you that’s interesting. I’ll just note that UV != bright light (eg. when wearing corrective glasses you can have UV filter but no visible light filtering).