Why do we blink?

Answer 1

We blink as frequently as every four to six seconds. In fact, blinking happens so quickly that it doesn’t obstruct our vision.

The eyelids are folds of skin controlled by muscles that can expand and contract very rapidly. Between our eyelashes, just inside the rims of the eyelids are 20-30 sebaceous glands as well as tear glands. When we blink, these glands secrete lubricants that prevent the eyes from drying out. Each time the eyelids close, salty secretions from the tear glands sweep over the surface of the eye, flushing away small dust particles and lubricating the eyeball. Our eyelashes serve as dust catchers, because the reflex action of blinking automatically causes them to lower when exposed to some kind of foreign particles.

If you are in irritating conditions such as a smoke-filled room, you blink more frequently to keep the eyes clean and moist. You should also blink more often, even consciously, if you wear contact lens or sit before the computer screen for long periods of time.

Answer 2

There are two main reasons why we blink. I think.
First of all its because we need to blink to keep our eyes wet or else it would be too dry. In that way if we didnt blink then our eyes would probably dry out which would be totally gross.
The other reason is to wink. hehe

Answer 3

We constantly blink to moisten our eyeballs. Otherwise they'd dry out.

...and why is this in the "Anthropology" §?

Answer 4

we blink to protect our eyes from drying out and increase sight.

Answer 5

we also blink to keep dust particles out...

Answer 6

To keep your eyeballs from drying out.

Answer 7

For the answer, check out: http://www.coolquiz.com/trivia/explain/docs/blink.asp

Answer 8

To moisten and protect our eyes.

Answer 9

To keep our eyes moist

Answer 10

it is mental process-when we counter a situation thinking start--when we evaulateour self thinking start