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Objective: To assess the Frequency and the types of Posterior Capsular Opacification after extra capsular cataract extraction and posterior chamber intraocular lens (PMMA) implantation. Study Design: Descriptive study Place and Duration of Study: Department of Ophthalmology Holy Family Hospital, Rawalpindi from May 2003 to May 2005. Materials and Methods: Two hundred patients, with age ranges from 55 to 80 years, having uncomplicated senile mature cataracts who underwent ECCE with PCIOL over a period of one year were selected for the study. At 6th Month post operatively the patients were examined for any evidence of posterior capsular opacification with its type and the results were analyzed. Results: At 6 months follow up 70 patients (35%) developed posterior capsular opacification. Out of these 70 patients, 40 patients (57%) showed capsular fibrosis and 30 patients (43 %) Elschnig pearls. Conclusion: Our study revealed that the occurrence of posterior capsular opacification with PMMA intra ocular lens is high leading to significant number of patients with visually disabling complication in the post operative period.