We Should Protect Us from Ultraviolet Rays even in winter
Though it is cold in winter, the ultraviolet rays are also very strong. Actually compared to summer, the radiant intensity of ultraviolet rays in winter decreases only by twenty percent. Investigations find that in the developed countries, such as United Stated, England and France, with the development of people’s lives, more and more people prefer to take part in outdoor activities. The cold winter can hardly stop the pace of visitors. They will do a lot of outdoor activities, such as climbing, skiing, shopping, picnicking. The life in winter can be as colorful as in summer. So even in winter, people have some chance to be exposed to strong sunlight.
In winter, when people go out, they begin to embrocate themselves with a coat of the sun block or use a pair of sunglass to protect them from strong sun lights lest they should do harm to their skin. The fact that strong sunlight can cause some skin diseases is a common sense. But they will be harmful to our eyes besides skin diseases. They can even make us being blind. A few of ultraviolet rays are benefit to our health. But too many ultraviolet rays will do harm to our eyes. They will inhibit our immunity, cause some skin disease and some eye disease, especially cataract.
Being exposed to ultraviolet rays for long time, we are easy to have conjunctivitis, cell cancer and some other eye diseases. The report of WHO points that cataract is the villain of blindness. Though there are a lot of reasons for a person having cataract, the ultraviolet rays are the most important factors. Every year there are about one thousand six hundreds of people having cataract. And ultraviolet rays cause almost three hundred of them. This is a serious problem. We should not neglect it.
Most people think that only in summer it is necessary to prevent ultraviolet rays. Actually this is a wrong idea. Even in winter, it is also essential to protect us being exposed to strong lights for a long time lest we should have eye diseases.
Recommedation:plastic glasses
