Title: A Comparative Evaluation of Posterior capsular Opacification with Square Edged and Round Edged PMMA Intraocular Lens in Small Incision Cataract Surgery in rural areas of North Maharashtra
Authors: Dr Bandopadhyay Shweta, Dr Balwir Dheeraj, Dr Mahadik Sanjay
Aim: To compare the incidence of Posterior Capsular Opacification (PCO) after implantation of Round Edged Polymethylmethacrylate (PMMA) IOL and Square Edged PMMA IOL in cases of Small Incision Cataract Surgery (SICS) and to select clinically significant cases of PCO for Neodymium-doped Yttrium Aluminum Garnet (Nd: YAG) capsulotomy.
Methods and Materials: A retrospective and comparative study in 500 eyes of 500 patients underwent uncomplicated SICS with Round Edged IOL implantation in group A and Square Edged IOL in group B with a minimal follow up period of 1 year. During this period the best corrected visual acuity and grades of PCO were assessed.
Statistical Analysis: Unpaired t test and Chi square test were used for statistical analysis.
Results: Overall incidence of visually significant PCO was 19.6%,in group A the incidence was 29.6% and in group B it was 9.6%.
Conclusion: This study showed that manual SICS with implantation of Square Edged IOL is a cost effective option for low income groups in rural areas. Square Edged design induces a barrier effect on PCO thereby reducing migration of lens epithelial cells and reducing incidence of PCO.PMMA supports epithelial cell adhesiveness to a lesser extent.
Keywords: Small incision cataract surgery (SICS), posterior capsular opacification (PCO), Round Edged Polymethylmethacrylate (PMMA) IOL, Square Edged Polymethylmethacrylate (PMMA) IOL.