Common causes of amblyopia mainly include visual deprivation, refractive error, monocular strabismus and refractive error. 1. Morphological deprivation: Due to refractive interstitial clouding, ptosis and other factors, the retina cannot form a clear object image or cannot form an object image, which tends to make visual neurons develop abnormally, and can lead to morphologic deprivation amblyopia in patients. 2. Refractive error: a high degree of refractive error will easily lead to unclear retinal image, when the blurred object is transmitted to the visual center of the brain, the visual center may develop abnormally due to the lack of clear object stimulation, which will interfere with the development of the patient’s vision and lead to amblyopia. 3. Monocular strabismus: when the patient’s eye position is skewed, it will lead to imbalance in the direction of vision between both eyes, and the things seen by the eyes will have obvious deviation, which will not be able to be integrated into a single image in the brain’s vision, and there may be obvious overlapping shadows. In the long run, the visual center may inhibit the function of the eyes, thus leading to amblyopia. 4. Refractive error: In addition, amblyopia can also occur in patients with refractive error. It is recommended that patients with amblyopia consult a doctor to evaluate their condition and follow the doctor’s instructions.