A lot of old people will occur various eye problems, at the same time, eyewear with all kinds of features has also come into being, and become popular. The development of high technology has brought us a lot of convenience. Take glasses for example, many types of glasses have emerged and brought great help to different groups of people .
For example, some contact lenses are also available to presbyopia persons in the market, but the eye experts have pointed out that the use of presbyopic contact lenses must meet certain conditions. For instance, he or she is shortsighted, and has been used to wearing contact lenses, thus it is certainly easy to wear presbyopic contact lenses. But presbyopic contact glasses probably could not deal with astigmatism, so they are not suitable for myopic people with deep degree of astigmatism.
As to those who never have myopia and want to wear presbyopic contact glasses, they might need some time to learn and adjust. Maybe some people can not wear it because of adaptation or their own problems like dry eye, finally they still choose other ways. In addition, this kind of contact lenses only help patients to see objects in a close distance, not are accepted by everyone .
Eye expert says that if you change shortsighted contact lens to presbyopic contact lens you will find your ability of seeing long-range view is not good than before. But the general white-collar workers wear short-sighted insead of long-sighted glasses, because their work mainly is to look through documents by computers. As long as they can see clearly the short-term things ,it doesn’t matter a lot when they see the long-term worse.
The most common way to rectify presbyopica is to wear the glasses with right degrees, including two kinds below, which normally are used for nearsighted people. Bifocal glasses: two focus; wearers should use different areas of lens to see near or far. For example, look far with upper focus, such as watching television; lood near with lower focus, such as reading. The double-focus eyeglasses bring convenience to a certain extent, but meanwhile they are different from general shortsighted glasses. As a result, it requires process to adapt this kind of glass.
progressive spectacles: which has multiple focuses and the degree varies from up to down, ususlly the up for far view, the down for close objects and the midst for middle-distance things. The convenience of gradual glasses is favored by many people. Not only the middle aged and elderly people, even some parents let their little children to choose gradual glasses.
Furthermore, presbyopia sufferers without myopia can wear reading glasses only for near vision. This kind of glasses is only to pick up when reading, and take off on the other time. People who wear contact lens duo to nearsightedness can wear presbyopic glasses at the same time according to the instructions of oculists.