白内障术后后囊膜混浊的量化分析(英文)

目的:评估白内障术后疏水性丙烯酸人工晶状体Sensar AR40e和硅胶人工晶状体的后囊膜混浊(PCO),并用能客观评估PCO的软件量化分析。方法:共选择98眼行标准的超声乳化白内障吸除术,人工晶状体囊袋内固定。所有眼随机植入Sensar AR40e或硅胶人工晶状体,但同一患者植入的人工晶状体必须不同。在第1～2a时后照法拍摄后囊膜图像,通过去除浦肯野反光、增强对比度、过滤后增强低密度的PCO等方法处理后用POCO软件分析对比。结果:术后1a疏水性丙烯酸人工晶状体PCO百分比为0.32±0.13,硅胶人工晶状体为0.39±0.17(P=0.37)。2a时疏水性丙烯酸人工晶状体PCO百分比为0.42±0.20,硅胶晶状体为0.34±0.18(P=0.50)。患者术后1,2a时疏水性丙烯酸人工晶状体PCO的严重级别分别是0.50±0.30和0.82±0.58,与硅胶人工晶状体的0.63±0.35和0.55±0.35相比,无统计学意义(P=0.52,P=0.69)。结论:POCO后囊膜混浊量化分析系统提供了客观而且可重复性强的量化PCO的方法,也是研究预防PCO技术的有力工具。

Quantification of posterior capsular opacification after cataract surgery

AIM: To evaluate posterior capsular opacification (PCO) with hydrophobic acrylic intraocular lens (IOL, Sensar AR40e) and silicone IOLs after cataract surgery, to use a software program developed to provide an objective assessment of the amount of PCO in the digital images of the posterior capsule to quantify PCO. METHODS: Ninety-eight eyes underwent standardized phacoemulsification and "in the bag" IOL placement, were randomized to receive a three piece lens of hydrophobic acrylic or silicone, but lens materials were different in one case. In year 1 and 2, digitized retro-illumination images were taken from the posterior capsule. Images were analyzed by POCO software program, removing the Purkinje light reflexes, contrast enhancement, filtering to enhance low-density PCO. RESULTS: The percentage of PCO were 0.32±0.13 of hydrophobic acrylic IOLs in year 1, compared with 0.39±0.17 of silicone (P=0.37). In year 2, the percentage of PCO were 0.42±0.20 with hydrophobic acrylic IOLs and 0.34±0.18 with silicone IOLs (P=0.50). Of those patients with PCO in year 1 and 2, severity grades were 0.50±0.30 and 0.82±0.58 of hydrophobic acrylic cases, compared with 0.63±0.35 and 0.55±0.35 of patients with silicone IOLs (P=0.52,P=0.69) with no statistical significance.CONCLUSION: The POCO system is capable of producing an objective and repeatable measure of PCO that is relevant to assessing techniques of PCO prevention.