Quantification of posterior capsular opacification after cataract surgery

Abstract

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 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 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 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 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. Key words: Posterior capsular opacification; Quantification; Acrylate; Intraoeularlens