Patient's question:
A six-year-old boy with myopia and amblyopia has a corrected vision of 0.6. He has 275 and 250 degrees of myopia with 100 degrees of astigmatism and has undergone amblyopia training for one year.Doctor's answer:
Myopia is classified into mild, moderate, and high myopia based on the degree of refractive error. A refractive error exceeding 6.00D is considered high myopia. High myopia can be further divided into two major categories based on the presence or absence of ocular changes: one is simple high myopia, where the degree of myopia is high but can stabilize at a certain point without severe ocular changes. This accounts for a minority of high myopia cases. The other category is pathological myopia, also known as degenerative myopia or progressive pathological myopia. It is a distinct eye disease different from simple myopia, with refractive errors typically above -6.00D, often -10.00D or higher. Pathological myopia is characterized by continuous worsening of myopia accompanied by excessive axial elongation, leading to retinal changes. Pathological myopia is hereditary and unrelated to eye strain. If the degree of myopia increases by more than -1.00D within a year, or even reaches -2.00D or higher cumulatively, or if it reaches the level of high myopia at -20.00D, it is likely to be pathological myopia.