Why do people blink and what are the functions of blinking?

Blinking is a way of expressing affection and plays an important role in protecting the eyeball. The eyelids have many thin striated and smooth muscles, which are well innervated, and the eyelids open and close freely. Each time you blink, you can squeeze the tear gland to secrete more tears, so that the tear film evenly covers the surface of the cornea, relieving the uncomfortable symptoms caused by dry eye syndrome.

Frequent blinking has certain benefits for the eyes, and the biggest benefit is that it can relieve dry eyes and eye fatigue. Frequent blinking can reduce dry eye syndrome and eye fatigue. However, there are two sides to everything, and blinking too much and too often is also easy to develop a bad habit that affects the appearance and personal image.

It can moisturize the corners of the eyes, clean dust, bacteria breeding, relieve dry eyes, or stinging symptoms, and improve the development of nerves.

Blinking is a physiological need, the tear film is evenly distributed in the cornea, removes bacteria from the conjunctival sac, can protect the eyes, prevent the eyeball from being too dry, relieve eye fatigue and so on.

The biggest effect of human blinking is to form a tear film on the surface of the cornea to prevent the cornea from drying out. Therefore, the human eye should keep making blink movements.

This is because human blinking is a normal physiological phenomenon. Blinking relieves eye fatigue and allows the eyes to relax and rest.

Blinking is very normal, and blinking can also play a role in protecting the eyes, which is also very beneficial. It can prevent wind and sand or some dust from getting into the eyes, and can also moisturize and clean the eyes. It can also give your eyes a rest, and if your eyes don't blink all the time, you will be very tired.

This is because people blink to relieve eye fatigue, and it is also a very normal physiological phenomenon, and it can also protect the eyes.

Because it's a natural phenomenon, blink. The main effect is to relieve eye fatigue.

A normal person's eyelids blink about 15 times per minute. Blinking is good for the eyes: first of all, it acts as a cleansing and moisturizing eyeball.

Secondly, blinking can play a role in protecting the eyes. When sand or flying insects approach the eyes, the eyelids will blink naturally, which blocks the sand and insects. When your eyes are tired, you blink a few times and feel more comfortable, because the moment you blink, the light is interrupted, which gives your eyes a short rest.

Some people are particularly fond of blinking, which causes their eyes to be overworked, which affects their vision. The main reason for this problem is: due to some eye diseases, in order to reduce the uncomfortable feeling, the eyes have to speed up the frequency of blinking, and after a long time, they will develop the habit of blinking, and when the eye disease is cured, they still have the problem of blinking.

Blinking is not a disease, if there is no uncomfortable feeling, there is no need to **, just restraint, try to minimize the number of blinks, and it will get better after a while. If you have symptoms such as photophobia, tearing, and vision loss while blinking, you should go to the hospital for diagnosis and treatment in time.

Let's do a test, pinch the stopwatch and see how long you can last without blinking? I'm afraid it won't take more than 2 minutes, right? Why is that?

What is it that "flickering" on your eyelids? That's right, eyelashes! We know that eyelashes are used to keep dust out, but what should we do when a small flying insect or something suddenly strikes and the eyelashes can't resist it?

Don't worry, the eyelids and eyelids are lowered. This is the first reason to blink – to prevent accidental damage to the eyes.

Speaking of the second reason, let's first understand the knowledge of tears: tears are produced and secreted by the lacrimal glands and are a weakly alkaline transparent liquid, of which 98 2 is water, and the rest is a small amount of inorganic salts and proteosomes, as well as lysozyme, immunoglobulin A, complement system and other substances. Therefore, tears can moisturize, cleanse and protect the conjunctiva and cornea of the eyeball.

How to use such a good "eye care agent"? Every time you blink, the tears are evenly spread on the surface of the eyeballs by opening and closing the eyelids! It is also the main reason why we usually blink.

It is our eyes that keep warm, and blinking plays a role in protecting the moisturized eyes. It turns out that the eye has tear glands, which store tears, and every time you blink, the tear gland opening is pressed, and tears flow out, preventing the eyes from drying out. It can be said that every time you blink, you are "crying".

On average, the human eye blinks automatically every 2 10 seconds. This reflex blink is regular and constantly lubricates. Because blinking keeps the eyes moist, which is exactly what the eyelids do:

Protect your eyes. The inner surface of the upper and lower eyelids, as well as the eyeball itself, is covered with a transparent film called the conjunctiva, which helps the eye to keep the surface moist so that the eye does not rub when it moves. When blinking, the conjunctiva is coated with tears so that the eyes do not dry out.

If you try to keep your eyes open, will you cry, it's very sour, in order to moisturize your eyes.

Blinking moisturizes the eyes and can remove dust from the surface.

I feel like it should be like this, why do you say people have eyebrows? Pigs have a lot of dust, we still can't see it, the eyebrows are to put us in the spirit, don't let the dust run into the eyes