How come if I close exactly one eye I see nothing..Not black, but if I close both I see black and not “Nothing”?

Question

How come if I close exactly one eye I see nothing..Not black, but if I close both I see black and not “Nothing”?

In: 26

Answer 1

It seems to me that, when I close my right eye and direct both eyes to the left, I can see both what is to my left, and the inside of my right eyelid at the same time. The right eyelid is just mostly transparent.