I. What is myopia all about? A few days ago, a friend contacted me and said that my child seemed to have increased myopia and needed to come to the hospital to get glasses. A checkup, the second half of the upcoming senior high school Xiaoming (a pseudonym), myopia actually reached 650 degrees, and a little astigmatism. However, Xiaoming’s parents are not wearing glasses. Second, so how is Xiaoming’s myopia so heavy? First, let’s understand what myopia is all about. If our eyes are not nearsighted, not farsighted, and not astigmatic, they look especially good, and are called orthokeratology. If the external parallel light can not focus on the retina, but in front of the retina, need to move the object closer or with the concave lens to disperse light to focus on the retina, is myopia. Myopia is a condition in which you can see clearly up close, but not clearly at a distance. There are three causes of myopia: 1. The anterior and posterior diameters of the eye are too long. 2, the eye’s fixed-focus lens corneal refractive power is too strong. 3, the lens refractive power of the eye’s zoom lens is too strong. There are many factors that influence the development of myopia, and the main factors are broadly classified as genetic factors, environmental factors and nutritional factors. 1, genetic factors: parents unilateral myopia, the probability of inheritance is about 25%. The probability of inheritance is about 50% if one parent is highly myopic. If both parents are highly myopic, the probability of inheritance is as high as nearly 100%. 2, environmental factors: a large number of close eye use is the main cause of myopia, such as: writing homework, reading newspapers, watching TV, playing with computers and cell phones, etc. In addition, various improper attention to close work, such as light environment, distance, duration, eye habit posture, etc., can also induce the development of myopia. 3, nutritional factors: poor dietary structure and eating habits are also one of the causes of myopia. For example, many children nowadays are partial eaters, eat too sweet, unbalanced intake of micronutrients, etc., which can lead to a decrease in the eyes’ ability to resist myopia. So eating more green vegetables, fruits, and supplementing with lutein can help prevent myopia. The child’s good academic performance, but also pay more attention to good eye habits, but all the way to the heavy school work ah, he also has a very important genetic factors, is his mother my friend was also highly myopic, just a few years ago to do surgery to remove the heavy glasses.