Cock-eye is the common name for internal strabismus, which can generally be improved through optical treatment, corrective training, and surgical treatment (muscle reduction). 1. Optical treatment: If the patient is suffering from myopia, hyperopia and other refractive errors, the patient needs to wear appropriate glasses to correct the refractive errors and alleviate the symptoms of esotropia. 2. Corrective training: patients with esotropia can follow the doctor’s instructions to carry out corrective training such as orthophoria training and negative fusion collection to improve diplopia and control eye position. 3. Surgical treatment: patients who have no obvious effect after conservative treatment can undergo relevant surgical treatments in time, including muscle weakening surgery, strengthening surgery, horizontal muscle vertical displacement surgery, etc., to improve the deviation of eye position. It is recommended that patients with internal strabismus should consult the doctor in time to evaluate their condition and follow the doctor’s instructions.