Amblyopia in one eye should first find out the cause of amblyopia, and according to the different causes of amblyopia, corresponding treatment should be carried out, usually masking treatment and amblyopia training are needed. 1. Covering treatment: refractive amblyopia can be categorized into refractive error and refractive error amblyopia, first of all, the exact degree of refractive error should be determined, and the prescription of glasses should be carried out, if the difference in visual acuity between both eyes is more than two lines after wearing the glasses, it is also necessary to cover the dominant eye. 2. Amblyopia training: If it is form deprivation amblyopia, the causes of form deprivation should be removed first, such as congenital cataract, congenital ptosis, congenital pupil membrane closure, etc. Pupil dilation should also be performed to determine whether there is refractive error. If a significant refractive error is present, prescription lenses are also required. Whether or not a refractive error is present, amblyopia training is required. Amblyopia in one eye requires prompt medical attention and correction and training as prescribed by the doctor.