Some parents choose to use electronic products to teach their children early education courses because they are more vivid than paper books and electronic products. Take the ipad as an example. Using a tablet computer to give children early education courses, the picture is vivid and more stereoscopic. Secondly, after connecting to the Internet, you can interact online, so that children can take the initiative to answer questions, participate in them, and have a deeper course experience.
In this regard, some experts pointed out that tablets and smart touch-screen phones with large screens should not be used for early education.
Playing games with touch-screen mobile phones causes * * * to the ciliary muscles of eyes, which is equivalent to 16 times of watching TV at a distance of 3 meters, while watching cartoons with IPAD causes * * * to the ciliary muscles, which is equivalent to 10 times of watching TV.
The seemingly exaggerated information may actually hurt children's eyesight more seriously than the information itself.
Children play mobile phones or tablets for a long time, and after 20 minutes, their eyes will enter the stage of pseudomyopia. Because the child's lacrimal gland is not fully developed, it is easier to focus on the screen for a long time, which is more likely to cause dry eyes. Because children pay more attention than watching TV, watching mobile phone or tablet 10 minutes 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.
Modern science and technology is a double-edged sword. For example, more and more people are kidnapped by smartphones and tablets and spend a lot of time on them every day. At the same time, the "low-headed family" is getting younger and younger, and even children less than one year old start staring at the screen.
Parents are increasingly worried about the possible negative impact of screen time on their children. Unfortunately, this fear has been confirmed.
Speaking of negative effects, many people's first reaction is that it is harmful to children's eyesight, which is indeed a great harm. But what we are going to talk about today is the potential negative impact that many parents did not expect, because this impact is not immediate, but very serious.
A study led by Dr. Kathleen Beacon, a Canadian pediatrician, found that there is a link between the time spent using tablets and mobile phones and the language delay of children aged six months to two years.
Nearly 900 children's parents shared the time their children spent on the screen every day for 18 months, and the researchers then evaluated their language development.
They observed various language indicators, including children's vocabulary, and whether they used sounds or words to get attention or help. The results show that every time children spend 30 minutes on the screen every day, the risk of "delay in expressing words" increases by 49%, that is, expressing words means using sounds and words. According to the research results, Dr. Bacon suggested that parents should avoid giving screen time to children under 18 months.
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 clearly what is on the small screen, you need to close your eyes. The closer you are to the ciliary muscle, the stronger you are.
When watching TV at a distance of 3 meters, the * * * produced to the ciliary muscle is about 0.3 units; Adults use desktop computers,
Average eye distance 1 m, * * * 1 unit; When using IPAD, the average eye distance is 0.3m, * * * 3 units; When using a touch-screen mobile phone, the average distance is 0.2 meters, * * * 5 sets, which is almost equivalent to watching TV 16 times. 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 due to incorrect reading posture and lying down while writing, but in recent years it is due to the influence of electronic products. In fact, after all, some early education machines still have to use blue screens under the banner of eye protection, which is actually unreliable. It will also hurt 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. Parents can supervise their children if they come into contact with them. 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 acuity of common electronic products from low to high is: TV (strictly keep a distance of 3 meters)