有些老年人会无意中发现自己的眼球角膜边缘出现一圈灰白色的环状痕迹,好似“包绕黑眼珠的环”,不痛不痒,亦无其他异常感觉。医学上称之为“老年环”。过去,人们多把这种“老年环”看做是普通的老年性生理衰退的表现。近年来医学研究表明,“老年环”与 Some elderly people will inadvertently find their eye cornea edge of a ring of gray ring marks, like “wrap around the black eye of the ring,” itching, nor any other unusual feeling. Medically referred to as the “elderly ring.” In the past, people used this “ring of the aged” more often as a manifestation of ordinary senile sexual decline. In recent years, medical research shows that the “elderly ring” and