The principle of red light flicker treatment for amblyopia refers to stimulating the development of red light-sensitive cone cells in the central macular recess through red light and flicker patterns, and promoting the recovery of amblyopia in this way, which is mainly applicable to central gaze amblyopia during the sensitive period of vision development, and can also promote the recovery of vision in this way if amblyopia exists after cataract surgery in children. Amblyopia that has not been treated by other methods can also be tried in this way. This treatment does not have any side effects and can be used to treat amblyopia if the child is under eight years old, although the treatment time is usually longer, with a cycle of at least six months.