Medical Optometry is an optometry and dispensing center backed by professional ophthalmology. It is a branch of optometry. The result of conventional optometry is only to let the refractive error to see clearly, while the purpose of medical optometry is to let the patient see clearly but also to add the function of health care. After the optometry prescription can see clearly, but also feel comfortable wearing lenses and can read long-lasting. The content of medical optometry includes the degree of optometry, eye position, adjustment, binocular monovision function, convergence set function, binocular adjustment balance, the identification of the dominant eye, and finally the synthesis of the above situation to issue a scientific prescription. To achieve the purpose of wearing clear and comfortable lenses and reading lasting, health care. And can effectively prevent the occurrence of computer terminal eye disease. The effect of medical optometry is obviously better than conventional optometry, through medical optometry after wearing frames or contact lenses, will not occur visual fatigue, myopia photometric state is more stable, the development of slow or stop. On the other hand, conventional optometry does not take into account other aspects of visual function, i.e. binocular monovision, stereopsis, etc., and is prone to visual fatigue and even myopia deepening.