Chi T, Ritch R, Stickler D, Pitman B, Tsai C, Hsieh F Y
Department of Ophthalmology, New York Eye and Ear Infirmary, NY 10003.
Arch Ophthalmol. 1989 Jun;107(6):836-9. doi: 10.1001/archopht.1989.01070010858029.
Results of previous studies have strongly indicated that the prevalence of elevated intraocular pressure is greater in blacks than in whites and that blacks are more susceptible than whites to glaucomatous damage at any given level of pressure. It has also been suggested that a larger disc area might predispose an eye to glaucomatous damage. We investigated the possibility that clinically quantifiable differences might exist in optic disc parameters between normotensive white and black patients. Disc area, cup-to-disc ratio, and cup volume measured with a video-ophthalmograph (Rodenstock Optic Disc Analyzer) were significantly larger in blacks than in whites, while there was no difference in the disc rim area between the two groups. We derived a mathematical model of the optic disc that relates posterior displacement of the lamina cribrosa to the disc area, distensibility of the disc, and intraocular pressure.
以往研究结果强烈表明，黑人眼压升高的患病率高于白人，并且在任何给定眼压水平下，黑人比白人更容易受到青光眼性损害。也有人提出，较大的视盘面积可能使眼睛易患青光眼性损害。我们研究了正常血压的白人和黑人患者在视盘参数上可能存在临床可量化差异的可能性。用视频检眼镜（罗敦司得视盘分析仪）测量的视盘面积、杯盘比和杯体积，黑人明显大于白人，而两组之间的视盘边缘面积没有差异。我们推导了一个视盘的数学模型，该模型将筛板的后移与视盘面积、视盘的可扩张性和眼压联系起来。
