白内障患者手术前后辨色力的变化

Change of chromatic discrimination in cataracts before and after surgery

目的研究白内障患者行超声乳化术+人工晶状体(IOL)植入术手术前后辨色力的变化。方法选取46～84岁的年龄相关性白内障患者22例(30眼),术前矫正视力为0.5～0.8,行白内障超声乳化手术+可折叠IOL植入术。采用Farnsworth-Munsell100(FM100)色棋盒测试患者术前及术后1个月的色觉变化,并利用其自带软件计算色觉错误评分。结果术后单组色棋盒的错误评分及总评分均较术前降低(P<0.01),术后绿色-蓝色色棋盒的错误评分高于其他3个组(P<0.01)。结论利用FM100色棋盒可以定量测定白内障患者的色觉质量。

Objective The assessing method of conventional visual function for receiving phacoemulsification ＋ intraocular lens implantation is the visual acuity examination. But the study of chromatic discrimination on these patients is uncompleted. This study was to investigate the change of the chromatic discrimination in the patients with age-related cataract before and after surgery. Methods Twenty-two patients with age-related cataract （30 eyes） undergwent phacoemulsification ＋ intraocular lens implantation at the Third Hospital of Peking University were collected. The patients aged from 46 to 84 years with the best corrected visual acuity from 0. 5 to 0.8 before the surgery. Chromatic discrimination was tested using Farnsworth-Munsell 100 Hue boxes before and after the surgery. The error score of the hue discrimination was calculated by windows-based PC scoring software. Results Before the surgery, the error score of hue discrimination box was not significantly different among red-yellow group, yellow-green group, green-blue group and blue-red group （ F = 1. 881, P = 0. 137 ）. However, the error score of hue discrimination box was remarkably reduced in red-yellow group,yellow-green group and blue-red group compared with green-blue group after the surgery （P 〈 0. 01 ）. The error score of hue discrimination box was significantly lower after surgery than that of before surgery in red-yellow group,yellow-green group, green-blue group, blue-red group and FM 100 Hue test error score（ P 〈 0. 01）. Conclusion FM 100 hue test is a good method to evaluate the chromatic discrimination in cataractous patients.