Prevalence of lens opacities in a population-based survey in Sofia District: a preliminary report.
Vassileva
P
P
Sofia District Hospital, Medical Academy, Sofia, Bulgaria.
Parvova-Djurova
T
T
Parvanov
G
G
D000328:Adult; D000367:Age Factors; D000368:Aged; D000531:Altitude; D002031:Bulgaria / Q000453:epidemiology; D002386:Cataract / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D012737:Sex Factors