A proper pair of eyeglasses is especially important for people who are nearsighted, farsighted, astigmatic and presbyopic. But if the glasses you wear don’t fit properly, they can cause you endless problems. When people get glasses, they usually take an eye test to see if they are nearsighted or farsighted, and then get a pair of glasses hastily, which is not a scientific method. Inaccurate eyeglasses may cause visual fatigue, and for children who are still developing and using their eyes highly, it may make their prescription more unstable and accelerate the development of myopia. Therefore, medical optometry is very important. Medical optometry is based on the patient’s eye examination, refractive state, eye position, adjustment, visual function, age, occupation, eye habits and other diagnostic indicators and give a scientific prescription, directly related to the accuracy and comfort of the glasses, which requires a wealth of knowledge of medicine, optometry, the effect is not only to see the object, but also play a therapeutic and health care of the eyes, so that the eyes to enjoy the clarity and comfort. Surveys show that people who wear frames or contact lenses after medical optometry have a very low likelihood of visual fatigue, a more stable refractive state of myopia, and slow or stopped development.