purpose: to describe the methodology and implementation of the investigation for prevalence and causes of visual impairment in tehran province. methods: this population-based cross-sectional study was conducted on all urban and rural residents of tehran province in 2003. a stratified cluster random sampling with probability proportional to size procedure was used. first, best pinhole-corrected ...

Purpose. To study the correlation between demographics and clinical variables and long-term severe visual impairment in patients with Stevens-Johnson syndrome (SJS) or toxic epidermal necrolysis (TEN). Methods. A retrospective chart review of SJS/TEN patients between 2004 and 2014 was conducted. Demographics, causative agents, ocular manifestations, and visual outcomes were collected. The data ...

AIM To conduct a rapid assessment of cataract surgical services to estimate the prevalence and causes of blindness and visual impairment in members of the population aged >/=40 years in the Limbe urban area, Cameroon. METHODS Clusters of 50 people aged >/=40 years were sampled with probability proportionate to size. Compact segment sampling was used to select households within clusters. All e...

background: considering population aging in iran and the importance of cataract surgery in the old age, this study was performed to show the cataract surgical rate (csr) between 2006 and 2010 in tehran province. methods: eighteen centers were randomly selected from cataract surgery centers in tehran. in each center, one week in every season was randomly selected and the number of cataract surge...

BACKGROUND Light severely affects the occurrence of seasonal affective disorder (SAD). AIMS To compare the prevalence of SAD in persons with severe visual impairment and persons with full sight, and in persons with severe visual impairment with or without light perception. METHOD This cross-sectional study assessed the Global Seasonality Score (GSS) and the prevalence of SAD among 2781 pers...

BACKGROUND There has been considerable recent interest in the impact of unilateral visual impairment on functional status and wellbeing, particularly in relation to second eye cataract surgery. AIM To determine if unilateral visual impairment has a measurable impact on health related quality of life (HRQOL) in an older community, as assessed by the generic, multidimensional 36 item short form...

PURPOSE Epidemiologic evaluation and investigating the causes of visual impairment in any society is a matter of concern and has a direct effect on the country's health care planning. In this study we describe causes of low vision and blindness in Iranian patients referred to rehabilitation clinics for taking vision aids. METHODS In this cross-sectional study, visual acuity was classified bas...