RESUMEN
Evaluation of epidemiology and seasonal variation of Rhegmatogenous Retinal Detachment [RRD], in patients undergoing retinal detachment surgery. Medical records of 416 patients admitted in KHATAM eye hospital [Mashhad, IRAN] were reviewed between years 2000 to 2008. Information about sex, age, season and month of incidence and operation and concomitant risk factors of patients, were gathered and analyzed. Average age of patients was 41 years old. Most of the cases of the disease were observed in the age group of above 6- y/o [35%]. The frequency of the RRD was higher in male patients than in females. [Ratio: 1.7 to 1]. Distribution of our cases in different seasons showed no significant difference between them [P value = 0.142]. The highest and lowest rate of RRD was observed in October and September respectively with October having 51 patients [12.3%] and September having 23 patients [5.5%]. Myoia and pseudophakia were most common risk factors. There was no statistically significant relationship between age and month [and season] of incidence [or diagnosis and surgical procedure] of the RRD, likewise for gender. This study showed more RRD in male patients. Patients above than 60 years old have greater risks of incidence of RRD. No seasonal incidence pattern for RRD was founded; however, most of cases occurred in October, and at least in September