Abstract: the research of relevant experts shows that when the sound intensity is above 90 dB, the sensitivity of rod cells in the fundus retina to distinguish light brightness begins to decline, and the time to identify weak light response is prolonged. When it exceeds 45 dB, 40% of people have dilated pupils, and when it reaches 115 dB, the adaptability of the eyes to light brightness decreases by 20%, accompanied by the weakening of color perception.
in the past, we often stole our parents’ glasses out of curiosity and pretended to be an intellectual. Now, more and more children don’t have to steal their parents’ glasses because they have their own glasses. Myopia is getting younger and younger. What is the reason why our children put on glasses too early? How to teach them to protect their eyes?
causes of myopia
1. The metabolism of sugar in sweets
sweets and carbonated drinks in the human body requires a large amount of vitamin B1 and reduces the content of calcium in the body. Calcium is the “protector” of eye tissue. Lack of calcium in the body will not only reduce the elasticity of the eye retina and increase the pressure in the crystalline body The lengthening of the anterior and posterior diameter of the eyeball can also cause degenerative lesions in the cornea and ciliary muscle, so as to weaken the elasticity of the eyeball wall and promote the deepening of myopia.
countermeasures: eat less or no sweets and drink more milk. Milk can supplement calcium, which naturally increases the protection ability of eye tissue.
when noise acts on auditory organs, it will also “spread” to visual organs through the action of nervous system, weakening people’s vision. In short, noise can reduce the sensitivity of human eyes to brightness. The research of
experts shows that when the sound intensity is above 90 dB, the sensitivity of rod cells in the fundus retina to distinguish light brightness begins to decline, and the time to identify weak light response is prolonged. When it exceeds 45 dB, 40% of people have dilated pupils, and when it reaches 115 dB, the adaptability of eyes to light brightness decreases by 20%, accompanied by the weakening of color perception.
countermeasures: try to reduce the volume when using household appliances or talking.
3 learn piano too early
usually, preschool children’s eye development is in the golden period, and children’s vision is not fully developed and mature. Practicing the piano too early without paying attention to protecting eyesight, children have a high probability of myopia. Moreover, the characters of the piano score are usually relatively small. When children practice the piano, they look at the piano score and the keyboard, and they look at it from a close distance for a long time, which is more likely to make people feel tired.
practicing piano too early and for a long time will accelerate the development of eyeball emmetropia and consume the original hyperopia too early. If it is not corrected in time, children are more likely to have myopia.
countermeasures: for children learning piano, in addition to regularly checking their eyesight, parents should also pay attention to amplifying the piano score to sub light paper, light yellow or light green; Put a non frequency flashing eye protection lamp for children on the piano; Rest for more than ten minutes every 45 minutes, cooperate with eye exercises or overlook and close your eyes; Take children to do more outdoor sports. Of course, in order to protect their eyesight, children under the age of 5 had better not learn the piano.
4 lack of sleep
lack of sleep will cause children’s systemic autonomic nerve dysfunction, affect the local sympathetic and parasympathetic nerve dysfunction of the eyes, and lead to the disorder of ciliary muscle regulation, which is the pathological basis for the formation of myopia.
countermeasures: appropriately reduce children’s learning pressure and ensure adequate sleep. Urge children to form the habit of taking a nap and reduce their pressure.
and once teenagers suffer from myopia, whether wearing glasses or not, the degree of myopia will increase with age, physical development and other reasons.