There are probably six common causes of increased myopia rates in preschoolers:
1. Genetic factors
Surveys have shown that a large proportion of myopic children have myopia in both parents or one parent. However, only two or one parent is highly myopic, the genetic phenomenon is obvious, and the child may develop congenital myopia. The high degree of myopia here refers to more than 800 degrees. Below 800 degrees, children may have the recessive gene of myopia, and the appearance is not myopic, but it is easy to be myopia in the same environment.
2. The relationship between zinc and vision
Zinc is an essential trace element of the human body, with the function of promoting growth and development and tissue regeneration, enhancing immunity, and promoting appetite. Zinc and? eye? The relationship is close. The content of zinc enzymes in the eyes is higher and the activity is stronger. If there is a lack of zinc in the body, night blindness and optic neuritis may occur, which seriously affects vision.
3. Malnutrition
It is often due to the child's partiality of food, especially the lack of vegetables. The survey found that many children look white and fat on the outside, and their food is mainly meat, which is seriously biased, resulting in vitamin deficiency.
4. Malnutrition
The reason is that the child's spleen and stomach are indigestion, and the food eaten cannot be well absorbed, resulting in nutritional deficiencies. There are also some children, eating too many small foods, but also cause malnutrition.
5. Children learn too early and too much
Many parents hope that their children will become Jackie Chan, let their children learn too early, learn too long, and be too tired.
6, the light of the environment
The distance to watch TV and computers, lack of light, lack of exercise, etc. are all external causes of myopia in young children.
7. Certain diseases
Certain diseases may also cause myopia in children, and premature babies are prone to myopia. According to a set of data from the Center for Low Vision in New York, more than 50% of the causes of damage to children's vision are congenital diseases, especially congenital cataracts, congenital glaucoma and optic nerve diseases.
Time to check children's vision
1-6 years old is the sensitive period of the child's visual development, it is best to do a vision examination every 3 to 6 months; if it is a premature baby, weighing less than 2000g, and there is a history of oxygen use, the child should be screened for retinopathy of prematurity as soon as it is born, checked once a week, until the corrected gestational age of 40 weeks or the retinal vascular development is normal.
Under normal circumstances, healthy babies born at term will respond to light, but the visual development of the eyes is not perfect, and there is physiological hyperopia. 4 months to establish a three-dimensional sense, generally at the age of 2 years old vision can reach 0.4, 3 years old vision can reach 0.6, 6 years old when the vision can reach 1.0.
The period from 1 to 6 years old is a sensitive period for children's visual development, and it is best to do a vision examination every 3 to 6 months. At this stage, if the child likes to watch TV at close range, or likes to squint his eyes, tilt his head to see things, like to rub his eyes, etc., he should pay attention to it, see a doctor in time, and once he finds amblyopia or refractive error, he can be treated in time.
To stay away from myopia, you must let the baby develop good eye habits from this stage, the eyes are about 1 foot away from the book, sitting in a correct posture, and resting for 5 minutes every 20 minutes. Parents want their children to be smart and healthy, so while caring for their children's nutrition and education, they must protect their children's eyes.