Experts have warned that people who wear frame glasses do not throw away old ray ban when they buy new ones. After long time work in front of the computer screen, the following phenomenon will occur to your eyes: tears, foreign body sensation, unclear or even decreased vision.

You may wear your old glasses to avoid fatigued permanent hurt cause by excessive adjustment of your eyes. In general, the strength of old glasses is 1.25 diopter less than that of new ones. Wearing ray ban sunglasses to look at computers is the most appropriate. As people are born with ability of adjustment, in principle, people needn’t adjust their eyes to see the distance.

If the object is moved close to 5 meters, it can only been clearly seen by eyes adjustment. And the nearer the object approaches to you, the bigger adjustment protency is needed in order to see the nearby object more clearly. If you often see close things, the adjustment of your eyes is often used then. Crystal, ciliary muscle and the suspensory ligament of prolonged tension will trigger tears, foreign body sensation and so on. Thus, to reduce 1.25 diopter of myopic ray ban wayfarer for close objects is very helpful to eyes. The following are notes of wearing contact lenses. First, look at the instructions carefully. Grasp strictly the ways and requirements to out on and put off contact lenses. No matter which kind of contact lenses, taking them out to washing and sterilization treatment everyday are supposed to be done on principle. People had better not wear glasses while sleeping, so that the cornea can have a natural breathing, and thus to reduce complications.

You should put off contact lenses slightly in case of damaging lenses and cornea. Once eye pain, photophobia, tearing, hyperemia are discovered when wearing the glassed, you should immediately take off the lens and temporarily stop to wear by placing them inside the box and go to the hospital for a treatment in time. At the same time, bring the unclean lenses the case with you to do the necessary laboratory examination. And choose more effective medicine according to the examination result. Temporarily unused lenses should take clean disinfects and be closed preserved in box full of treatment lotion and sterile saline to avoid pollution and drying. In recent years, disposable contact lenses have appeared,they will be discarded after usage in order to reduce infection, but still need cleaning and disinfection in time. Under normal circumstances, the lens can have a moving range of 0.5 to 1mm on the cornea, which will not lead to the fluctuation of the eyesight or any discomfort of the eyes.