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角膜环是老年角膜常见的改变,是类脂质蓄积于角膜周边部形成的环样混浊;环与角膜缘之间有1mm左右的透明环带。它并不侵犯角膜中央区。在临床上,角膜环既不影响视力也不产生角膜溃疡和新生血管。由于它和某些疾病(例如高脂蛋白血症,尤其是其Ⅱ型和Ⅲ型)同时发生而被注意。据报道,冠心病患者角膜环的发生率似乎高于健康者,尤其是50岁以下。有的学者发现其程度与老年人心电图异常的发生率有显著关系。临床和病理学特征提示,角膜内蓄积的类
Corneal ring is a common change in the cornea of the elderly, is the kind of lipid-like accumulation in the cornea peripheral ring-shaped opacity; between the ring and the limbus, about 1mm transparent ring. It does not violate the central cornea. Clinically, the corneal ring neither affects vision nor produces corneal ulcers and neovascularization. It is noted for its coincidence with certain diseases, such as hyperlipoproteinemia, especially its type II and type III. It is reported that the incidence of corneal ring in patients with coronary heart disease appears to be higher than healthy people, especially under 50 years of age. Some scholars found that the degree of ECG abnormalities in the elderly and the incidence of a significant relationship. Clinical and pathological features suggest a class of accumulation within the cornea