角膜类脂环是一种角膜周边部的灰白色混浊圈,常发生于老年人,故旧有角膜老年环之称。因为混浊圈仅限于角膜周边部,不影响视力,从眼科角度来看无重大临床意义。在老的教科书上,都把它说成是一种单纯的老年性变化。然而,在临床上往往发现动脉硬化的病人在疾病的早期伴有角膜类脂环。某些调查也证实在动脉硬化的病人中有半数 Corneal alveolar ring is a corneal opalescent opacity circle, often occurs in the elderly, so the old corneal ring known. Because the opacity circle is limited to the corneal peripheral part, does not affect the visual acuity, from the ophthalmic point of view no significant clinical significance. In old textbooks, it is described as a simple change in the elderly. However, it is often clinically found that patients with atherosclerosis are accompanied by corneal alicycles early in the disease. Some surveys also confirm that half of patients with atherosclerosis