Electronic products not only enrich children's childhood life, but also have negative effects. Today we don't talk about cell phone addiction, only about the harm of electronic products to eyesight.
Some parents will use tablets or mobile phones as early education tools for their children to hold, which will make them nearsighted, but will damage their vision.
In this regard, some experts pointed out that tablets and large-screen smart touch-screen mobile phones cannot be used for early education.
Playing games with touch-screen mobile phones can stimulate the ciliary muscles of the eyes, which is equivalent to 16 times that of watching TV at a distance of 3 meters, while watching cartoons with IPAD can stimulate the ciliary muscles 10 times.
The seemingly exaggerated data may actually damage children's eyesight more seriously than the data itself. After 20 minutes, the child will enter the stage of pseudomyopia. Because the child's lacrimal gland is underdeveloped, staring at the screen for a long time is more likely to cause dry eyes. Because they have to pay more attention than watching TV, 10 minutes watching mobile phone or tablet is equivalent to watching TV for 30 minutes.
Let's not talk about children, that is, when adults are brushing their mobile phones, if they stare for 30 minutes for a long time, they will feel tired, dizzy or dry eyes.
Because the difference between electronic products and TV is that people are closer to the screen, highlighting high-definition pictures requires eyes to stare at the screen tightly, and the adjustment ability of ciliary muscles is different when people's eyes look far and near.
In order to see the contents of the small screen clearly, the eyes need to be very close, and the closer they are, the stronger the stimulation to the ciliary muscles will be.
When watching TV at a distance of 3 meters, the stimulation to ciliary muscle is about 0.3 unit; When adults use desktop computers, the average eye distance is 1 m, and the stimulation is 1 unit. When using IPAD, the average eye distance is 0.3 meters, stimulating 3 units; When using a touch-screen mobile phone, the average distance is 0.2 meters, which stimulates 5 units, almost equivalent to 16 times of watching TV.
Therefore, for children, their eyesight is still developing, and they will forget to blink if they are too focused. But blinking is actually a kind of protection for the surface of the eyes, and the resulting tear film can protect the eyes from dryness, but this protection is only temporary and needs to be supplemented by blinking again. If parents are careful, they will find it easy for children to keep staring at mobile phones and tablets and forget to blink. Once a child's eyes are dry, it is easy to form dry eye.
In recent years, the incidence of myopia in children is on the rise, which is not only due to the inheritance of parents, but also related to the invasion of a large number of electronic products into life. Many children have put on their eyes or corrective glasses when they are in kindergarten. This has a lot to do with their premature contact with electronic products and early education with tablet computers.
Children's arms are much shorter than those of adults. When they look at electronic products, they are much closer than adults. Many visual impairments are irreversible. Once a child's vision is damaged, it may be a lifetime thing.
Children's attention is more easily attracted by the sound and color of the tablet, and it is difficult for adults to avoid the temptation of electronic products, let alone children. Many schools will also arrange for children to complete their homework with electronic products, which is actually not desirable.
In the past, children's myopia was mainly caused by incorrect reading posture and prone writing, but in recent years it has been caused by the influence of electronic products. Some early education machines are under the banner of eye protection. In fact, in the final analysis, it is not reliable to use a blue screen. This will also do harm to children's eyesight. To prevent children from myopia, the first thing is to ask children to contact electronic products as late as possible.
From the perspective of good eyesight, it is best for children not to play with mobile phones and tablets before going to primary school. If the child is exposed, parents can supervise the child. One is to supervise their children not to play for more than 15 minutes. The other is to supervise that the distance between their eyes and the screen should not be too small, especially when the surrounding environment is very dark, which will double the damage to their eyes.
According to the screen size, the visual stimuli of common electronic products from low to high are: TV (strictly keep a distance of 3 meters)