Sharma Y R, Vajpayee R B, Honavar S G
Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, Ansarinagar, New Delhi.
Arch Environ Health. 1994 Sep-Oct;49(5):414-7. doi: 10.1080/00039896.1994.9954995.
We undertook a prospective clinical study to test our initial impression that cortical opacities are seldom present in the upper part of the lens. Data analysis revealed that of 174 eyes having cortical opacities, only 15 (8.62%) had opacities in the area of the lens between the 10- and 2-o'clock positions. Lid retraction, defined as upper lid position at or above the limbus, was seen in 13 (88.66%) of these eyes. Our study indicates that in the absence of lid retraction, cortical opacities are very rarely seen in the upper segment of the lens, a segment that is normally covered by the upper lid. This suggests a protective effect of the upper lid against cortical opacities, and indirectly it supports the theory that senile cortical opacities may be the result of thermal damage to the lens.
我们进行了一项前瞻性临床研究，以验证我们最初的印象，即晶状体上部很少出现皮质混浊。数据分析显示，在174只出现皮质混浊的眼中，只有15只（8.62%）在晶状体10点至2点位置之间的区域出现混浊。睑裂退缩定义为上睑位置在角膜缘或其上方，在这些眼中有13只（88.66%）出现睑裂退缩。我们的研究表明，在没有睑裂退缩的情况下，晶状体上部区域（通常被上睑覆盖的部分）极少出现皮质混浊。这表明上睑对皮质混浊有保护作用，并且间接支持了老年性皮质混浊可能是晶状体热损伤结果的理论。
