大气污染最严重的二氧化氮有着破坏眼的保护层——角膜上皮的作用,而且,怀疑它会使水晶体浑浊,引起白内障。从日本北里大医学部眼科石以哲教授所作的动物实验中得出了明确的答案:眼的角膜上皮遭到破坏之后,使得眼睛对细菌和病毒处于“无法预防的状态”。二氧化氮的浓度为0.2～1 PPM时,所饲养七个月的七只大 Nitrogen dioxide, the most polluted air, has a corneal protective layer, the corneal epithelium, and, in the meantime, suspects that it will cause turbidity in the crystal and cause cataracts. From animal experiments conducted by Professor Shi Yizhe of Ophthalmology, Kitagaku University of Medicine, Japan, a clear answer has been reached: After the destruction of the corneal epithelium in the eye, the eye is in an “unpredictable state” for bacteria and viruses. Nitrogen dioxide concentration of 0.2 to 1 PPM, the seven-month-old seven large