Why Do People Blink Their Eyes?

People blink their eyes unconsciously. Each person blinks his or her eyes once every two to eight seconds. This is the body's protection for the eyes.

Outside the eyeball, their is a layer of very thin membrane which can be very painful when it is irritated. In that case, you should blink your eyes so tears will be produced to wash the irritants out. In addition, if you do not b" your eyes for quite some time, your eyes will feel dry and sore. When you blink your eyes often, they are moister and feel more comfortable. When you suddenly see strong light, your eyes will blink automatically to adapt to the light.