The causes of myopia include internal and external causes.
- Internal cause
The internal factors include genetic factors and developmental factors. Genetic factors refer to chromosome recessive inheritance of high myopia, and myopia has genetic tendency; developmental factors refer to the development of eyeballs in infancy, which will lead to myopia.
- External causes
The external factors are mainly environmental factors, such as long-term close reading, insufficient lighting, too close reading distance, too long reading time, unclear or too small font, bad reading posture or riding in the car, premature and long-term use of electronic products.