why does vision seem to improve when we simulate binoculars with our hands?
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A lot of our vision happens in our brains. Our eyes are actually terrible cameras, and jump around a lot to compensate for the distortion and the narrow field of view they have. Our brains take all that image information and smooths it into what we think we see.
Putting your hands over your eyes like that cuts out a lot of the edge stuff. Our eyes don’t jump around as much since we recognize that there is nothing worth noticing there, so we are gathering more light from the area on the binocular holes. Additionally, it taxes the vision part of our brain less, so we can focus more on that patch that is directly ahead of us.
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