The development law of myopia in adolescents, parents should save a copy
With age, the refractive state of children is constantly changing (farsightedness - orthopic - myopia), in this process, children behave normally before the diopter is faced, that is, the speed of children's eye development cannot be assessed by simple measurements, in fact, if they undergo standardized refraction, it can be found that these children have shown that the formalization speed (rapid development of the eye axis) before myopia is found.
During this period, although the vision of myopic children is within the normal range, it is actually "myopic" compared with the normal value of children of the same age.
The length of development and diopter of the eye axis at different times
Birth: Eye axis length 18.5mm, diopter +4.00D
3-4 years: Eye axis length 23.5mm, diopter +2.00D
6-8 years: Eye axis length 23.7mm, diopter +1.00D
9-12 years: Eye axis length 24.0 mm, diopter 0
In the process of human refractive development, from birth to 3 years old is a period of rapid changes in diopter in life, most of the newborn babies have low-degree hyperopia, along with growth, corneal curvature gradually flattened, the eye axis gradually prolonged, to the school age gradually completed the process of orthodonization, during which some children began to appear myopia and gradually deepened.
Therefore, 0 to 3 years old, is a more critical period of visual development, 0 to 12 years old is a sensitive period, the sensitive period of children for scientific refractive examination, and early and accurate correction of refractive error, regular follow-up, will help reduce refractive errors and myopia growth too fast caused by eye complications, reduce the risk of high myopia blindness.
Most of the problems with children's visual development begin in these two periods, and all adverse factors affecting visual development should also be corrected during these two periods.
Some of the content of the article comes from the Internet, if there is infringement, please contact to delete