Why do some children have recurrences of amblyopia after treatment? What are the main causes of recurrence of amblyopia? The main cause of recurrence is that the patient does not follow the doctor’s instructions for regular follow-up; the normal vision obtained is not yet consolidated and the patient opens the healthy eye on his own, the method of consolidation is to open it for 2 hours a day for 2 hours, after 1 month if the treatment is consolidated then the opening time is extended to 4 hours a day, later to 6 hours, 8 hours, until it is opened all day. The vision obtained in the amblyopic eye can also be maintained by using translucent paper or cosmetic amblyopic masking lenses or by painting the lenses with nail polish so that the vision in the healthy eye is two lines lower than in the amblyopic eye. The use of overcorrected or undercorrected lenses or the use of alternating suppression can serve to maintain and consolidate the vision in the amblyopic eye. If the visual acuity of the amblyopic eye does decrease after stopping amblyopia treatment, the amblyopic eye can be covered again and the treatment can be repeated to improve the visual acuity to the highest level, and the speed of improvement will be faster than before the relapse. At the same time, monocular function training in both eyes was strengthened to consolidate the treatment effect. The follow-up period will be once a month for the first 6 months, and then once every 6 months until 1.5-2 years. How to prevent recurrence after amblyopia is cured? In order to prevent recurrence of amblyopia, the following points should be noted: (1) Covering therapy should be removed gradually after the vision has returned to normal. First, open the mask for 2 hours a day, then extend the opening time to 4 hours a day after 1 month, and later to 6 hours, 8 hours, until the full day opening or change from full mask to half mask to consolidate the effect. During the consolidation period, no relaxation of fine work. (2) After normal vision, the first 6 months need to be reviewed once a month, later to 3 months, half a year, until the follow-up follow-up 3 years until the complete cure. (3) If the amblyopic eye is found to have decreased visual acuity, the healthy eye can be re-covered and the amblyopic eye can still be improved to the original level. (4) In addition to vision enhancement therapy for strabismic amblyopia, efforts should be made to train the monocular function and fusion power of both eyes. If vision loss is found, amblyopia treatment should be resumed. Amblyopia treatment should not be stopped suddenly, but should be gradually reduced and the interval should be extended, and amblyopia treatment should be stopped slowly, and after stopping, the amblyopic eye should be often used to watch movies, TV, write small words, do fine work, or do drawing games on the carousel painted with black and white lines, through these simple and easy methods to stimulate macular function and prevent amblyopia from recurring.