A 3 year old with 500 degrees of farsightedness can be corrected with glasses and amblyopia treatment. A 3 year old child often has more than 300 degrees of hyperopia, which will gradually be relieved as the eyeball develops with age. However, if the hyperopia of a 3-year-old child reaches 500 degrees, it may be caused by the lagging development of the eyeballs, which will easily lead to amblyopia. Parents need to take their children to regular hospitals for optometry, complete the relevant examinations, and choose appropriate glasses to wear to prevent amblyopia. If there is already amblyopia, it is recommended to have amblyopia treatment in time, and the earlier the treatment, the better. At the same time, in daily life, we should pay attention to control the time of the child’s use of electronic products, pay attention to eye rest, do not use the eyes too much. When parents find that their 3-year-old child has 500 degrees of farsightedness, it is recommended to go to the hospital in time, and be treated by a professional doctor to prevent vision deterioration.