Blinking
A human eye blinking in slow-motion.
Blinking is something that the body does. It is a fast closing and then reopening of the eyelids. It is semi-autonomic, meaning the person doesn't have to think about blinking to do it. People blink to keep the eyes wet by spreading water from the tear ducts around the eyes.[1] Blinking can also be used to spread feeling, in body language.
Blinking Media
Birds, reptiles and sharks blink with a nictitating membrane from one side of the eye to the other.
Closed eye of a human, displaying eyelashes, which function to catch irritants when the eye is blinked.
