The prevalence of ptosis in an Iranian adult population

Purpose to determine upper eyelid ptosis prevalence and some related factors in 44- to 69-year-olds of shahroud in the north of iran. methods in 2009,using multi-stage cluster sampling,300 clusters of 40–64-year-olds were selected in shahroud city,and all 5190 participants were invited to be re-examined in 5 years (2014). the current report is the second phase of the study in which 4737 (91.3%) people participated and underwent vision tests,slit lamp examination,biometry,and ophthalmoscopy in 2014. upper eyelid ptosis was determined by an ophthalmologist. results the prevalence of upper eyelid ptosis was 4.7% [95% confidence interval (ci): 4.1–5.4]; 5.2% in women and in 4.0% in men. the prevalence of bilateral and unilateral ptosis was 1.3% (95% ci: 1.0–1.7) and 3.4% (95% ci: 2.8–4.0),respectively. the observed prevalence of ptosis was 3.1% in the 45- to 49-year age group and 5.8% in 65- to 69-year-olds. the prevalence of ptosis increased with age. in the multiple logistic regression model,ptosis prevalence correlated with older age,diabetes (odds ratio = 1.53,95% ci: 1.16–2.02) and hypertension (odds ratio = 1.41,95% ci: 1.03–2.92). mean corneal astigmatism was 1.02 (95%c]: 0.87–1.18) diopter in ptotic eyes and 0.87 (95% ci: 0.84–0.89) diopter in non-ptotic eyes (p = 0.013). conclusions the present report provides valuable information on the prevalence of ptosis in a population of 45-to 69-year-olds. the prevalence of ptosis in this study was considerably high and significantly increased with age. © 2016 iranian society of ophthalmology