Why are we blinking? Detailed answer

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Why are we blinking? Detailed answer

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Why are we blinking?

When we drive a vehicle in bad weather, it is very important that the wiper blades work effectively. But even the best car windshield wipers can't compare to the "wipers" given by nature to our eyes! The eyelids of our eyes, moving up and down, are the "wipers" when we blink.

The eyelids are folds of skin and can be raised and lowered by special muscles. But they move so fast that they never interfere with our vision. A curious detail - our eyelids work automatically, just like the included "wipers". We blink every 6 seconds! This means that during our lifetime we lower and raise our eyelids about 250 million times! Why is blinking important to us? How does it protect our eyes?

One of the reasons is the presence of eyelashes. These are short hairs that run along the edge of each eyelid. They are designed to trap dust particles that can get into the eyes. When we walk in the rain or in a dust storm, the eyelids automatically close and the eyelashes deflect foreign particles. Eyebrows also prevent rain or sweat from getting into your eyes.

However, the main benefit of blinking is that it automatically lubricates and moistens the eyes. Along the edge of each eyelid runs a row of 20-30 small glands. These glands have outlets between the eyelashes. When the eyelids close, the glands secrete a secret. The secretions lubricate the surface of the eye, eyelid and eyelashes, so they do not dry out.

Now about how blinking provides moisture to the eyes. Each eye has a lacrimal gland that stores a fluid called tears. When blinking, the eyelid opens the lacrimal gland, and some fluid is released from it. This protects the eye from drying out. We can say that we "cry" every time we blink!

Author: Likum A.

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