On a related note, why is it that looking at the sky when there's a lot of light, if I use both eyes it hurts, but if I keep one closed I can see the sky just fine?
That's actually a bug; your brain averages light levels across both eyes when deciding how much to flinch.
Don't do it - you're basically exposing yourself to potentially damaging light levels in the eye you keep open.
One desensitized eye
I'm not sure, it doesn't matter which one I close
Pure conjecture, but maybe one overloaded eye is easier to handle than two?
On a related note, why is it that looking at the sky when there's a lot of light, if I use both eyes it hurts, but if I keep one closed I can see the sky just fine?
That's actually a bug; your brain averages light levels across both eyes when deciding how much to flinch.
Don't do it - you're basically exposing yourself to potentially damaging light levels in the eye you keep open.
One desensitized eye
I'm not sure, it doesn't matter which one I close
Pure conjecture, but maybe one overloaded eye is easier to handle than two?