[Poor vision and its causes among the population of Belorussia].
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D006801:Humans; D008875:Middle Aged; D002094:Republic of Belarus; D014786:Vision Disorders / Q000453:epidemiology* / Q000209:etiology
Slabovidenie i ego prichiny u naseleniia Belorrusskoĭ SSR.