Experts warned that people who wear frame prescription glasses do not trouble your selves to throw away the old glasses after getting the new glasses. If you work too long before the computer, eyes may have tears, feel eyewinker or see unclearly, and the eyesight may even decrease.
You can wear old glasses so that your eyes won’t be hurt permanently because of excessive adjustment and fatigue. Generally speaking, the degrees (strength) of the old glasses are 1.25 diopter less than the new glasses. Wearing glasses online 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. As closer the object moves to you, your eyes have to adjust more to see nearby objects 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. Therefore, to reduce 1.25 diopter of myopia reading glasses properly when looking at the close object will be good for the eyes. Following is points for attention of contact lenses. First, look at the instructions carefully, and strictly command the right way and requirement to put on and take off glasses. No matter you wear which kind of contact lens, in principle, you should everyday put them off and deal them with cleaning and disinfection in accordance with the regulations. You’d better not to wear glasses during sleep to help the cornea get natural breathing and thus reduce complications.
You should be gentle when removing lenses, in order to prevent damages to the lens and cornea. If you feel painful, photophobia, tearing, hyperemia and so on when wearing contact lenses, put off them right now in the case and go to hospital in time. bringing the lens and contact lens with you for necessary examination, according to which the effective medication could be chosen. Temporarily unused lens should be sealingly stored in a lens box full of comprehensive nursing liquid or aseptic saline after cleaning and disinfection,in order to prevent pollution and dryness of lens， There are already Disposable contact lenses in recent years to reduce infection by discarding after use, but the timely treatments of cleaning and disinfection are still needed. Under normal circumstances, the lenses can move0.5 ~ 1 mm in the corneal surface. This will not cause fluctuation and discomfort.