The colossal squid has the largest eyes in the world.
4
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Tigers can see 6 times better at night than humans.
305
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
The human eye blinks an average of 4,200,000 times a year.
233