Experts remind people who wear eyeglasses that when buying a new pair, the original ones should not be thrown away in a hurry. Before computer screens, if people work too long, it will cause tears, a feeling of something, unclear vision or even the decrease in eyesight.
You can put on the old eye glasses to avoid the permanent eye injury due to the fatigue by excessive adjustment. Generally speaking, the degrees (strength) of the old glasses are 1.25 diopter less than the new glasses. Therefore, it is most appropriate to wear a pair of old cheap glasses to watch the computer screen. Normal person is endowed with a gift in adjustment by nature. No adjustment is needed to watch the far place on principle..
When the object moves closer to 5 meters, you can see it clearly by adjustment. The more forwarding the objects moves, the more intensity of eye adjustment is need, so that nearby objects can be clealy seen. The adjustment of eyes will often been used if you usually see the things close by. It may cause the long time tension state of crystalline lens, ciliary muscle and suspensory ligament of eyes, then resulting in the discomforts such as lacrimation and grittiness. Therefore, reducing the strength of myopia prescription eyeglasses by 1.25 diopters appropriately is good for eyes. The following are notes of wearing contact lenses. First look at the instructions carefully, and strictly control the right way and requirements of wearing and removing the glasses. In principle, whatever contact lens you wear, they should be taken off every day for cleaning and disinfecting according to the instructions. People had better not wear glasses while sleeping, so that the cornea can have a natural breathing, and thus to reduce complications.
The action of removing glassed should be gentle to prevent damage to the lens and cornea. If finding eyes pain, photophobia, tearing, hyperemia and others when wearing lenses, you are supposed to take them out into the box, stop wearing for the moment and go to hospital in time. At the same time take along with the lenses and box to do necessary inspection. Selecting effective medicine according to the test result. The lens that temporarily doesn’t need to use should be disinfected and stored in a box with sterile saline solution or whole care fluid, in order to prevent contamination and dryness. There are disposable contact lenses in recent years. It can reduce infection by abandoning but also needs cleaning and disinfecting treatments in time. Under normal circumstances, the lens can move about 0.5 ~ 1 mm in the corneal surface, but will not cause any vision fluctuation or discomfort.