Objective: To evaluate the clinical features as well as the visual and anatomical outcome in eyes with posterior segment intraocular foreign bodies (IOFBs), to identify prognostic factors that predict find poor vision.Materials & Methods: In this retrospective analytical (historical cohort) study, the clinical records of 236 patients admitted to the hospital with posterior segment IOFBs (Intraocular foreign bodies) between March 1992 and March 2001 were reviewed and patients were followed in the out patient after discharge from the hospital. Factors analyzed included: age, sex, foreign body characteristics, entrance site, entrance site size, location of foreign body, RAPD, complications, time between injury to operation and initial visual acuity. The relation between these factors and poor vision was evaluated and analyzed using univariate and multivariate logistic regression analysis.Results: After a mean follow up of 8.1 months 53 eyes (22.21%) achieved VA of HM or less. On univariate analysis, final poor vision (HM or less) was influenced by poor initial visual acuity (P-value<0.001), presence of RAPD (P-value<0.001), endophthalmitis (P-value<0.001) size of foreign body larger than 3mm (P-value<0.001), entrance site size larger than 4mm (P-value<0.001) and shape of foreign body (P-value=0.027). Multivariate analysis identified poor initial VA, presence of RAPD, endophthalmitis and entrance site size larger than 4mm to be the factors significantly associated with poor visual outcome.Conclusion: Most of the posterior segment IOFBs is found in young males as a consequence of work accidents. Most patients require vitrectomy to remove the foreign body. On multivariate analysis significant prognostic factors for final poor vision of HM or less were initial poor vision, presence of endophthalmitis, RAPD and entrance site size larger than 4mm.