白内障术后早期对比度视力的恢复

Early recovery of contrast visual acuity in patients with cataract after operation

  • 摘要: 目的 评估白内障患者术后早期视觉功能的恢复。 方法 年龄相关性白内障42例 (60眼) , 在术前和术后1周、1月分别测量最佳矫正视力, 并应用多功能电子视力测量仪 (MFVA-100) 测量明亮 (85cd/m2) 、高亮 (260cd/m2) 背景下不同对比度 (100%、25%、10%) 的视力, 用log MAR值表示, 观察手术后矫正视力和对比度视力的改变, 分析不同情况下对比度视力相关性。 结果 手术前明亮背景下100%的对比度视力高于高亮背景下 (t=-2.901, P<0.05) ;明亮背景下, 术后1月100%的对比度视力高于术后1周 (t=-2.398, P<0.05) ;术后1周, 明亮背景下各对比度视力均高于高亮背景 (t=3.480、2.256、2.287, P<0.05) ;术后1月, 明亮背景下100%的对比度视力高于高亮背景 (t=2.647, P<0.01) 。 结论 白内障手术可显著改善患者的各对比度下视力。手术后随着时间进展, 高对比度视力可进一步改善, 低对比度下眩光造成的视觉障碍逐渐降低。

     

    Abstract: Objective To asses the early recovery of visual function of cataract patients after operation. Methods Forty-two patients(60 eyes) with age-related cataract were enrolled in this study.Their contrast visual acuity(CVA) was examined 1 week and 1 month before and after operation,respectively.Bright background(85cd/m2) and high-bright(260cd/m2) of different CVA(100%,25% and 10%) were detected with a multi-functional visual acuity tester(MFVA-100) and expressed as a log MAR value.Improvement in CVA was observed after operation.Correlation of CVA between two backgrounds was analyzed. Results The 100% CVA was higher in bright background than in high-bright background before operation than after operation(t=-2.901,P<0.05).The 100% CVA was higher in bright background 1 month after operation than 1 week after operation(t=-2.398,P<0.05).The CVA in bright background and high-bright background was higher 1 week and 1 month after operation(t=3.480,2.256,2.287,P<0.05,and t=2.647,P<0.01) than before operation. Conclusion Cataract surgery can significantly improve CVA in bright and high bright backgrounds,and visual impairment due to low contrast glare.

     

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