Baby eyes 0.8 on one side 0.5 may be more serious, resulting in baby eyes 0.8 on one side 0.5 may be true myopia, may be pseudomyopia, or eye diseases, need to analyze the specific situation. 1. True myopia: mainly due to eye axis lengthening, cornea or lens curvature caused by too large, is irreversible, so it is a more serious phenomenon, can only wear glasses or surgical refractive correction. 2. Pseudomyopia: mainly due to excessive eye use or environmental factors, is a less serious phenomenon, just need to rest or correct bad eye habits, can be relieved, no need to wear glasses. 3. Eye disease: If there is some kind of eye disease, such as congenital cataract, it will also cause low vision. Parents are advised to take their babies to the hospital for regular eye checkups and to seek immediate medical attention if there is any abnormality.