The process of optometry is mainly divided into three stages: initial optometry, precise optometry and confirmation optometry. 1. 1. Initial optometry: patients are generally required to undergo photoplethysmography or computerized optometry, which can help them understand the objective conditions of refraction, etc. Children under 12 years old need to have their pupils dilated before undergoing optometry. 2. Accurate optometry: After obtaining the refractive status of the patient, the patient can use a comprehensive optometry instrument to adjust the refractive data measured at the initial stage according to the actual situation of the patient’s eyes. This includes foggy vision, astigmatism axial position and degree test, cross cylindrical lens examination, red-green balance test, binocular balance test, etc. 3. Confirmation of optometry: Finally, the patient needs to try on the glasses and adjust the prescription through personalized adjustment to make the patient comfortable with the glasses. In case of vision loss, patients are advised to go to regular hospitals for optometry examination, which can better define the refractive state and prescription prescription of patients.