How come when it is extra bright outside, having one eye open makes seeing “doable” while having both open is uncomfortable?

Question

Edit: My thought process is that using one eye would still cause enough uncomfortable sensations that closing / squinting both eyes is the only viable option but apparently not. One eye is completely normal and painless.

This happened to me when I was driving the other day and I was worried I’d have to pull over on the highway, but when I closed one eye I was able to see with no pain sensation whatsoever with roughly the same amount of light radiation entering my 👁.

I know it’s technically less light for my brain to process, less intense on the nerve signals firing but I couldn’t intuitively get to the bottom of this because the common person might assume having one eye open could be worse?

In: Physics

Answer 1

I think this explains why I close one eye to look at my phone screen when I’m too drunk and in the dark because the screen too bright? It’s so much easier looking at it with one eye.