Can someone explain night vision to me?

Question

So if I have to go pee at night, I don’t turn on lights in the house but I do use the bathroom light. Before I turn on bathroom light, I keep one eye closed.

Afterwards, when I leave the bathroom, the formerly-closed eye can see in the dark well but the eye that got light is a bit terrible.

So I use the formerly-closed eye to navigate back to bed.

So how does night vision work?

In: Biology

Answer 1

Pupils dilate to allow in a certain amount of light, each eyes pupils are at different dilation.