Humans usually blink 20 times per minute !

Humans usually blink 20 times per minute, said researchers, but when they're concentrating on computer work, that rate of blinking drops to between just one and three times per 60 seconds. That lack of blinks is leading to uncomfortable outcomes for many, from blurred vision to dry eyes to headaches from the strain.

On an average, most people blink 15 to 20 times per minute. The blinking rate in newborns is only 2 times per minute.

A blink is defined as, “A temporary closure of both eyes, involving movements of the upper and lower eyelids”. Human adults blink approximately 12 times per minute and one blink lasts about 1/3 of a second.

The average person blinks between 14,400 and 19,200 times a day. Spontaneous blink rate was significantly larger in women than in men (19 vs 11 blinks per minute); older women blinked more frequently than younger women.

While you're awake, blinking helps clear your eyes of dust or other particles that might get in your eye; blinking also lubricates your eyes to make sure they don't get dry or irritated. When you're asleep you stop blinking, so keeping your eyes closed is the best way to also keep them safe.

Your eyes can dry out, because your tear film isn't being replenished. This can lead to eye pain and blurry vision. Your risk of eye infection increases due to debris that stays in your eye and a lack of oxygen to the eye.

Blinking is essential for your eye health. It plays a key role: It keeps your eyeballs lubricated and in clearing debris from your eyes, like small particles from the air, dried tears, and dead cells, bringing nutrients and other substances to your eyes that help keep them healthy, and bringing oxygen to your eyes. Additionally, blinking lets your brain briefly rest, helping you refocus on whatever it is you’re doing.