The occurrence of more than 700 degrees of myopia in a 2-year-old boy can be influenced by a combination of factors such as genetics and improper eye use, with a relatively high degree of myopia being more likely to be inherited, but the use of electronic products cannot be ignored. Myopia is a kind of refractive error, affected by the above factors, when the light enters the eye, converge in front of the retina, can appear blurred vision, vision loss and other phenomena. Therefore, parents should take their boys to the clinic for timely intervention. I. Common causes 1. Genetics: The prevalence of myopia in children with both parents suffering from high myopia is higher than in those with one parent suffering from high myopia or no myopia. The heredity of severe myopia and moderate myopia is high, which may lead to myopia of more than 700 degrees in 2-year-old boys; 2, improper use of eyes: electronic products are also a high risk factor for the development of myopia, boys who start to contact too early or use electronic products for a long time may cause myopia; there is also the use of electronic products affect sleep, close observation of electronic screens and other factors, may also affect the development of vision; 3, other: such as the intake of sweets. 3, other: such as excessive intake of sweets, congenital eye disease, etc., will also have a certain impact on the fundus tissue, which in turn affects the development of vision. The parents need to take the boy to an ophthalmologist to rule out any fundus lesions. 700 degrees of myopia can be corrected by wearing frames under the guidance of a doctor, or by undergoing vision correction surgery in adulthood, such as laser surgery. 2, life intervention: parents should pay attention to the boy’s balanced nutritional intake, not picky eaters; control the boy’s viewing time and eye distance of electronic products. Ensure sufficient sleep and increase outdoor activities during the day to help relax the eyes.