Why do people keep blinking

summary

People are naturally curious and have a strong curiosity about all kinds of things. Curiosity makes people progress. For example, many small things in life make us have many questions. For example, we always blink. When our eyes are sore, when we shed tears, or when our eyes go into something strange, we will blink to relieve discomfort. Now let's learn why people blink.

Why do people keep blinking

First: blinking is a fast eye closing action, called blink reflex. It can be divided into two types, one is involuntary blinking movement, the other is reflex eye closing movement. Involuntary blinking movement, usually without external stimuli, is completed unconsciously. Normal people blink more than ten times per minute, usually every 2-6 seconds, and it takes 0. 2～0。 Four seconds.

Second: involuntary blinking is actually a kind of protective action. It can make tears evenly distributed on the cornea and conjunctiva, so as to keep the cornea and conjunctiva moist. Blinking can also make the retina and eye muscles rest temporarily. The cause of this involuntary blinking is not clear.

Third: tears are produced and secreted by lacrimal gland, which is a kind of weak alkaline transparent liquid, 98.2% of which is water, the rest is a small amount of inorganic salts and protein bodies, as well as lysozyme, immunoglobulin A, complement system and other substances. Therefore, tears can moisten, clean and protect conjunctiva and cornea.

matters needing attention

We blink is a kind of protection for our eyes, and it can moisten the eyeball by secreting tears, relieve fatigue and clean the eyeball. It seems that our constant blinking has such a great effect. At the same time, we should also pay attention to protecting our eyes and make the window of our heart transparent and clean.