Recently, it seems that the number of children who have been in contact with digital devices such as smartphones and game consoles for a long time has been increasing, and their eyesight has deteriorated accordingly. Especially children who play games for a long time are overusing their eyes. So, this time, I will explain what causes vision loss and how to improve it.What Causes Vision Loss in Children?There are two possible causes of poor eyesight in children: "environment" and "heredity".Living environment such as TV and gamesThe cause of poor eyesight in children is the large living environment. For example, if you watch a game, TV, or computer for a long time, the muscles that adjust the focus function of your eyes may become stiff, leading to myopia (Short-sighted).Heredity also has a big influenceIt is known that heredity also has a great influence on poor eyesight. Especially in the case of myopia, the influence of heredity is large, and it is a characteristic that the symptoms become more prominent in the upper grades. If moms and dads have poor eyesight, children can also have poor eyesight.How to improve your child's vision lossTotally ban smartphone use or set rulesThe most important thing to improve a child's vision loss is to completely ban the behavior of looking at smartphones. Not only apps but also YouTube is prohibited. Look at a small screen for a long time, which is not the best thing to do, so if possible, take the plunge and ban it altogether. If it is difficult to completely ban it, it is important to set rules so that you do not show your smartphone for a long time, such as setting the time you can see in a week in advance.Set rules for watching TVHow to interact with TV is really difficult, isn't it? Many of you may have the experience of continuing to look at the screen for hours without stopping when you start looking at it. Parents need to have good control over their children's TV viewing time. For example, it's a good idea to set a rule for TV, one hour in the morning and one hour in the evening.Reduce screen timeFor children who often watch smartphones and TV, it is recommended to reduce the time to gaze the screen nearby. Especially when you are absorbed in games and smartphones, you often get your face close to the screen. If you look at your child and feel that it's a little closer to the screen, be careful to say a word and take your face off the screen to reduce the amount of time you spend staring at the screen.Get in the habit of looking into the distanceIf you look at the screen too close, the focus function of your eyes will be fixed and it will be difficult to see things in the distance. Therefore, it is recommended to get in the habit of looking at distant objects on a regular basis. It is advisable to look far away every few hours, as looking far away will help your eyes rest and take a break.Cool and warm your eyesIf your child's eyes are tired, it's a good idea to warm them with a towel. If you use a warm towel, it may be even more effective if you also warm the back of your neck. It will relieve eye tension (loosen) and relieve tiredness, so try it if you are overworking your eyes. It may also be better to cool when there is redness. If you're not sure whether to cool or warm, talk to your doctor.Let's start with what we can do to improve our eyesightThere is no doubt that children are more likely to overuse their eyes with smartphones and games than before, all over the world. If you are worried about your child's vision loss, please try the countermeasures introduced here.