老年环为由于胆固醇,磷脂和中性脂肪沉积于角膜浅层和实质。脂肪由血液而来,与动脉粥样硬化类似,所以多年来临床家们认为老年环的发生可能伴有动脉粥样硬化的存在,近年来证明角膜老年环的发生 The ring of the elderly is due to the deposition of cholesterol, phospholipids and neutral lipids in the superficial cornea and parenchyma. Fat from the blood, and atherosclerosis similar, so many years of clinical experts believe that the occurrence of the elderly ring may be associated with the presence of atherosclerosis in recent years proved the incidence of corneal ring in the elderly