The purpose of medical optometry is to enable patients to see clearly, comfortably and permanently. It is based on conventional optometry to conduct the examination of the dominant eye, eye position, binocular monocular function, collective function and binocular adjustment balance. Conventional optometry only takes a few minutes to ten minutes, while medical optometry takes more than half an hour. Medical optometry: refractive error (myopia, hyperopia, astigmatism) – frame glasses, contact lenses, refractive surgery patients, strabismus, amblyopia, presbyopia, post-operative optometry for cataract patients, treatment of visual fatigue (especially computer terminal syndrome patients), treatment of dry eye, vision loss (correct diagnosis of other eye diseases).