All Facts Of Human Eye

1) Eyes began to develop 550 million years ago. The simplest eyes were patches of photoreceptor protein in single-celled animals.

2) Your eyes start to develop two weeks after you are conceived.

3) The entire length of all the eyelashes shed by a human in their life is over 98 feet with each eye lash having a life span of about 5 months.

4) To protect our eyes they are positioned in a hollowed eye socket, while eyebrows prevent sweat dripping into your eyes and eyelashes keep dirt out of your eyes.

5) Your eyeballs stay the same size from birth to death, while your nose and ears continue to grow.

6) An eye is composed of more than 2 million working parts.

7) Corneas are the only tissues that don’t have blood.

8) Only 1/6 of the human eyeball is exposed.

9/) The human eye weights approximately just under an ounce and is about an inch across.

10) An eye cannot be transplanted. More than 1 million nerve fibers connect each eye to the brain and currently we are not able to reconstruct those connections.