: to analyse the rate and relationship between preoperative risk factors and intraoperative complications of phacoemulsification surgeries performed by ophthalmology residents.

prospective study of preoperative risk factors and complications of phacoemulsification Surgeries performed by resident in anteriorsegment clinic of Khatam eye hospital.

charts of 475 patients operated by 13 ophthalmology residents , were evaluated. Intraoperative complications rate was 17.5%. major complications with potential effect on surgical final results, as posterior capsule rupture and zonular dehiscence and vitreous loss, had an incidence rate of 7.2%. On univariate analysis , significant preoperative risk factors were poor red reflex (P-V=0.001) ,psudoexfoliation (P-V=0.002) , poor pupil dilation (P-V=0.003) , control cloudiness (P-V=0.003) , dense cataract (P-V=0.004) , shallow anterior chamber (P-V=0.02) and older age (P-V<0.05)

Correspondence between intraoperative complications and some suggested preoperative risk factors shows that a careful preoperative examination or using of a systemic risk stratification system may predict risk full cases and could be beneficial in preventing complication in resident phacoemulsification.