冬季下雪以后,到处是白雪茫茫的,当你在雪地上长时间地行走和作业时,眼睛受雪面反射的强烈阳光刺激而发生不同程度的流泪、怕光等现象,这就是人们常说的“雪盲”,在医学上称为“雪眼炎”。为什么雪面反射的阳光会引起雪盲呢?原来,阳光中含有一种紫外线,在一般情况下,它可以被大气和地面物体吸收、散射。白雪覆盖大地后,紫外线经过冰雪的强烈反射,其含量可增加数倍。强烈的紫外线照射入的眼睛后,使角膜(黑眼珠表层薄 After snowing in winter, there are lots of white snow everywhere. When you walk and work on the snow for a long time, the eyes are affected by the strong sunshine reflected by the snow surface and cause different degrees of tears and fear of light. This is what people often say Of the “snow blind” in medicine is called “snow eye inflammation.” Why the snow surface reflection of the sun can cause snow blindness? It turned out that the sun contains a UV light, in general, it can be atmospheric and ground objects to absorb and scatter. After the snow covers the earth, the ultraviolet rays are strongly reflected in the snow and ice and its content can increase several times. After strong UV rays into the eyes, make the cornea (black eyeballs thin surface