白内障手术后后囊膜混浊的量化比较

Objective To evaluate posterior capsular opacification(PCO)with hydrophnbie and use a software program developed to provide an objective assessment of the amount of PCO in digital images of the posterior capsule to quantify PCO.Methods Ninety-eight eyes underwent standardized phacoemulasification and "in the bag" IOL placement.They were randomized to receive a three piece lens of hydrophobic or silicone,but lens materials is different in one case.On years 1 and 2 digitized retroillumination images were taken of the posterior capsule.Images were analyzed by POCO software program,removing the Purkinje light reflexes,contrast enhancement,filtering to enhance low-density PCO.Results Percentage PCO were in 0.32±0.13 ofhydrophobic acrylic IOLs at year 1,compared with 0.39±0.17 of silicone(P=0.37).At year 2,percentage PCO were in 0.42+0.20 with hydrophobic acrylic IOLs,0.344±0.18 with silicone IOLs(P=0.50).Of those patients with PCO at year 1 and year 2,the 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).Conclusions The POCO system is capable of producing an objective and repeatable measurement of PCO that is relevant to assessing techniques of PCO prevention.

Quantification of posterior capsular opacification after cataract surgery