The refractive state of the two eyes is not the same, called refractive aberration. Refractive aberrations of 150 degrees or more can cause amblyopia. A refractive error of more than 150 degrees can cause amblyopia, while a refractive error of more than 200 degrees can cause more serious amblyopia. Clinical manifestations 1. One eye has good vision and one eye has poor vision. If it is highly myopic or hyperopic refractive aberration, it can lead to low vision in both eyes. 2, refractive aberration, such as more than 2.5 D, because of the unequal size of the object image of both eyes to produce fusion difficulties and destroy binocular monovision, in order to make the object image clear will cause the contradiction between the adjustment of both eyes, so there are symptoms such as visual fatigue. 3, binocular monovision dysfunction: simultaneous vision, fusion vision and stereopsis dysfunction; 4, refractive error, high refractive error eyes can often develop strabismus (mostly exotropia). 5. Alternating vision. In cases where both eyes have good vision, both eyes can focus on the target, and both eyes can be used alternately; in another case, the child has one eye with myopia and the other with orthopia or mild hyperopia, and will involuntarily use the near-sighted eye when looking at the near, and the orthopia or hyperopia when looking at the far, forming a pattern of alternating the use of both eyes, although only one eye is used each time, but because the adjustment and collection are not used when looking at the far and near, there may not be any The symptoms may not be present. Treatment points 1. Covering treatment. By covering the healthy eye or the better eye to slow down or eliminate the inhibitory effect on the amblyopic eye, increase the use of the amblyopic eye, so as to improve the visual acuity of the amblyopic eye. 2. For those who cannot adapt to wearing glasses, the low prescription eye should be fully corrected to achieve the best visual acuity, and the other eye should be properly corrected by reducing the prescription of the lenses. 3, wear glasses can adapt to the full correction, and often wear glasses, in order to maintain the monocular function of both eyes and eliminate symptoms. 4, refractive disparity, the lens can not be corrected, to treat the poor eye amblyopia is the main. After the vision of both eyes is normal, surgery can be performed as appropriate to treat the higher degree eye to treat refractive error. 5. Select and use the compound amblyopia device according to the principle of refractory amblyopia treatment. 6. For refractory amblyopia or refractory amblyopia, early treatment with individualized programs is recommended.