The best eye protection product for children is free?

I don't know if you noticed.

Are there more and more children wearing glasses now?

There is news saying that during the winter and summer vacations,

Some hospitals have also opened special holiday ophthalmology clinics.

It is convenient for students and parents to register.

It is said that the family conditions are better now.

Almost no children would study in the dark.

Parents are also very careful to control their children's viewing of electronic products.

Some children,

Basically, they are never allowed to watch mobile phones or TV.

I always use an eye protection lamp when reading or studying.

But when I was in the third and fourth grades of elementary school, I was still nearsighted.

Some children go to see a doctor because of amblyopia.

Doctors recommend that in addition to regular treatment,

I have to go home and watch more mobile phones and TV.

Is there something wrong with the saying that watching TV is harmful to your eyes?

Click on the video to listen to Brother Rong's comments on whether watching TV is harmful to your eyes↓

First of all, we need to clarify a concept.

It's called distance vision reserve.

Our human eyes,

When we are born, our eyeballs are flat.

At this time, it is all farsightedness.

High school physics tells us that

The flatter the convex lens, the farther the focal point will be from the center of the lens.

Therefore, the image is formed behind the retina.

As you use your eyes more and more, your eyeballs will gradually become rounder.

That is, the lens bulges.

The image slowly falls on the retina.

The vision will return to normal.

From hyperopia at birth to normal vision,

It is the child’s distance vision reserve.

When our reserve of farsightedness is used up,

The eyeball continues to grow longer.

It stops growing at the age of twenty.

But the child will become nearsighted.

Due to the law of development, the lengthening of the eyeball cannot be reversed.

What should I do then?

Studies have found that:

Ensure two hours of outdoor activities every day.

It has a significant effect on delaying the elongation of the eyeball.

Spend an extra hour outdoors each week.

The chance of myopia can be reduced by 2%.

Can having fun outside prevent myopia?

What's the reason for this?

What is there outdoors that isn’t there indoors?

Sunshine!

Because sunlight stimulates the production of serotonin,

and dopamine secretion.

Our rod cells are photoreceptors

After being exposed to strong outdoor light,

It also releases dopamine in the retina.

Retinal dopamine

It is the growth and development of the eyeball, cell death and other activities

Key signal.

When retinal dopamine drops below a certain level,

The eye axis will begin to elongate.

The eyeball changes from flat to round and then to elongated.

Under outdoor light intensity,

Signs of continued eye lengthening

It will disappear as dopamine levels increase.

Of course, it is not easy to be nearsighted.

To use an inappropriate analogy,

We can compare our eyesight to a bank account.

Want to always have money in your account,

On the one hand, we need to spend less money.

On the one hand, you have to save money.

How about “spending less money” on vision?

Just reduce the time spent on playing with your phone and watching TV.

Don’t let your eyes get too tired.

Parents are often very wary of this.

But "save more money",

That is to ensure and increase outdoor activity time.

But it was ignored by everyone.

So back to the question at the beginning,

Electronic products are really harmful to the eyes.

But don’t watch electronic products.

It does not mean protecting your eyes.

Even if you are not playing with your phone or watching electronic devices,

Children are reading books and playing Lego at home.

Puzzles, playing the piano, reading music, etc.

They are also close-up eye use.

It will cause eyestrain.

So these activities

It is recommended to do it outdoors or on a balcony with good lighting.

It must be emphasized that

Outdoor activities are not just about sunbathing.

Even on rainy days, the outdoor light intensity

It’s also better than indoors.

Using an illuminance meter to measure the

Even in a bright room,

The lighting can only reach 300-400LX.

However, the outdoor illumination on rainy days is over 1000LX.

So even if it's not a sunny day,

We also need to encourage children to go out.

When ultraviolet rays are particularly strong,

You can choose to move in the shade.

Both can help prevent myopia.

There are countless eye protection products on the market today.

Eye protection lamp, lutein, blue light glasses...

What are the most recommended eye protection products?

Brother Rong still recommends outdoor activities first.

It doesn’t cost money and the effect is superb;

Not only can you exercise, but you can also play with toys and do homework.

Why not?

Source: China Digital Science and Technology Museum