Abstract: when noise acts on auditory organs, it will also “spread” to visual organs through the action of nervous system, so as to weaken people’s vision. In short, noise can reduce the sensitivity of human eyes to brightness.
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 lot 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 eye retina and increase the pressure in 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.
in addition, some experts said that “medically speaking, compared with those children with normal eyes of both parents, children with high myopia do have increased risk factors for high myopia from the perspective of physiology.” In other words, parents are nearsighted, and children are more likely to be nearsighted.
and once teenagers suffer from myopia, whether wearing glasses or not, the degree of myopia will increase with age, physical development and other reasons. At the same time, clinical cases also show that the degree increases faster without glasses than with glasses, so don’t have the misunderstanding that the more glasses you wear, the more myopia you get. Oh ~
five eye care foods
different eye tissues need different nutrients, only to ensure rich protein, sufficient vitamin A, sufficient vitamin C Adequate intake of vitamin B and sufficient calcium can meet its nutritional needs.
1. Vitamin A – vitamin A can also prevent and treat dry eye disease.
source: it is the liver, cod liver oil, milk and eggs of various animals. The carotene contained in plant foods can be converted into vitamin A in the body, such as carrots, amaranth, spinach, leek, green pepper, sweet potato and oranges, apricots Persimmons, etc.
2. Vitamin B group – vitamin B group deficiency will lead to eye photophobia, tears, burning pain and itching, visual fatigue and eye spasm.
sources: whole grains, liver, yeast, yogurt, wheat germ, beans, milk (vitamin B2), meat (vitamin B1, niacin).
3. Rich in vitamin C – if vitamin C is lacking, it is easy to suffer from cataract.
source: fresh vegetables and fruits, especially green pepper, cucumber, cauliflower, Chinese cabbage, fresh jujube, pear and orange.
4. Protein – protein is the main component of cells, and the eyes are no exception. The repair and renewal of tissues need to constantly supplement protein.
source: lean meat, animal viscera, fish and shrimp, milk, eggs, beans and other foods are rich in protein, and protein is the main component of cells, and the eyes are no exception, The repair and renewal of tissue requires continuous protein supplement.
5. Calcium – calcium can eliminate eye tension.
sources: beans, green leafy vegetables, shrimp skin and milk are rich in calcium. Cooking methods such as spareribs soup and sweet and sour spareribs can increase the content of calcium. Make sure your baby drinks 2 cups of milk every day to ensure calcium intake.