Why Do We…

BLINK? Why do we blink? (msn.com)

Blinking is a reflex. It happens involuntarily, but you can also make yourself blink. It takes the average person 400 milliseconds to blink, Pagan-Duran said. Most people blink somewhere between 10 and 20 times per minute, usually around 15 or 16 times, she added. However, there are some circumstances that make people blink more or less often. 

https://www.livescience.com/