Currently on the market there are four categories of computer glasses lenses: optical glass, ordinary resin sheet, high folding resin sheet or PC lens. Ordinary glass lens is cheap and scratch resistant resin; and PC lens is light and not brittle, especially PC lens, can get rid of nasal pressure induced rhinitis and headache pain, while the love movement of people is safe. From the aesthetic point of view, the number of height should choose high folding resin sheet, also can choose high folding glass sheet. For drawing and punching rimless frames, choose suitable resin computer glasses lenses. The weight of the lighter frame Glasses for two years to replace once Survey shows that people will replace glasses every two years, ordinary myopia patients should be replaced in general two glasses a year, one is adjusted degrees, two is updated". Once the lens mirror scratches, it will obviously affect its optical correction performance, so regular maintenance and inspection glasses, and timely updates, so that it is always in good working condition. A pair of high-quality computer glasses first is firm but lightsome. For the bridge of the nose sensitive people, lighter weight plate selection or borderless frames are more in line with the health needs. If you choose the metal frame or the bridge is not high enough, you can through the nose to adjust your eye pupil and lens angle, to ensure that maintaining a healthy perspective. Another function is to reduce the nose computer eyeglasses support weight. The frame material to choose a suitable skin If the metal allergy, the best choice of plate frame, so as not to cause skin discomfort. New glasses should be re optometry Can glasses experts believe that every time the glasses need to re optometry once, it is best to each hospital or a large shop please professional optometrists to glasses. In addition, new glasses optometry, it is best to take the old mirror before you, convenient optometrist for reference. In the United States, valid prescription eye doctor of optometry for one year, that is to say, each new glasses myopia re optometry.