AIMS To assess the relation between a country's economic developmental status and its prevalence of blindness. METHODS Available epidemiological data on worldwide visual loss and its causes compiled by the World Health Organization were reviewed. Findings were compared with economic development data from the involved countries and regions. Analysis was completed in view of the socioeconomic s...

We determined the underlying aetiology of blindness for the registered blind population of the Province of Newfoundland and Labrador. In both 1981 and 1984 single-gene disorders accounted for 30% of total blindness and congenital defects for another 10-11%. Genetically determined conditions, diabetes, and senile macular degeneration (SMD) were the three leading causes of registration in each ye...

Background: A prevalence survey of blindness and low vision was conducted in Oman in 2005. Here, we present the prevalence and determinants of blindness and low vision among the population ≥40 years of age. The results are then compared with those of the survey in 1997 and the changes following the ‘VISION 2020’ initiatives are assessed. Methods: The survey covered 24 randomly selected clusters...

Blindness associated with a cerebral lesion has been described as cortical blindness. This is the first reported case in which computerized tomography has documented cerebral edema to be the cause of cortical blindness in a preeclamptic patient.

Recent data suggest that a large number of people are blind in different parts of the world due to high refractive error because they are not using appropriate refractive correction. Refractive error as a cause of blindness has been recognized only recently with the increasing use of presenting visual acuity for defining blindness. In addition to blindness due to naturally occurring high refrac...

purpose: to identify the profile of cataract surgery in an iranian population. methods: this population-based survey was conducted on adults aged ≥50 years and over in 2009 at varamin district. cataract surgical coverage (csc) was defined as the proportion of operable cataractous eyes (best-corrected visual acuity [bcva] < 6/18 due to cataracts) that had been operated. poor outcome was defined ...

purpose: to determine the prevalence and causes of blindness and low vision in tehran province in 2005. methods: a population-based cross-sectional study was carried out involving all habitants living in tehran province in 2005. the study design was according to the world health organization recommendation methods and also a pilot study preformed among rural and urban areas of karaj. it was a m...

purpose : to evaluate the incidence and risk factors of severe visual impairment and retinopathy of prematurity (rop)-related blindness in a tertiary eye hospital in iran methods : in a cross-sectional study, clinical data of premature infants screened for rop in farabi eye hospital during 2003-2007 were reviewed. characteristics of advanced stages of rop (stage 4 or 5) were determined and comp...