Purpose: In order to study the cellular response and membrane formation on the surface of intraocular lens after cataract surgery and lens implantation, this study was designed to observe the deposits on the surface of implanted posterior chamber intraocular lens (PC-IOL) for 4,7,15,30 and 90 days in rabbits. Methods : 30 rabbits had undergone ECCE with PC-IOL implantation. PC-IOLs were removed at different stages after operation. 20 PC-IOLs were stained by HE to demonstrate cells on the surface of PC-IOL under light microscopy. 5 PC-IOLs for scanning electron microscopy were observed. 5 membranes were studied by transmission electron microscopy.Results: On 25 implanted PC-IOLs, the incidence of cell adhesion was 100% . The cells adherent to lens included macrophages,fibroblast-like cells,epithelioid cells,giant cells, ultralarge giant cells and lymphocytes. It was seen that there was a thin proteinaceous film on the surface of the implanted PC-IOLs and the membrane was composed of fibrin collagen fibri Purpose: In order to study the cellular response and membrane formation on the surface of intraocular lens after cataract surgery and lens implantation, this study was designed to observe the deposits on the surface of implanted posterior chamber intraocular lens (PC-IOL) for 4, PC-IOLs were stained by HE to demonstrate cells on the surface of 5 membranes were studied by transmission electron microscopy. Results: On 25 implanted PC-IOLs, the incidence of cell adhesion was 100%. The cells adherent to lens The was mackend-like cells, epithelioid cells, giant cells, ultralarge giant cells and lymphocytes. It was seen that there was a thin proteinaceous film on the surface of the implanted PC-IOLs and the membrane was composed of fib rin collagen fibri