When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Sheep, goats, octopuses, and toads have rectangular pupils.
7
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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Those things you see in your eyes when you stare into space are called Mouches Voltanes, which are also broadly referenced to as Floaters.
9
If the human eye was a digital camera, it would have 576 megapixels.
25
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132