P. Bucher|Carel IJsselmuiden
Prevalence and causes of blindness in the northern Transvaal.
november 1985 survey carried determine prevalence causes blindness elim hospital district gazankulu northern transvaal south africa assess eye departments effectiveness preventing blindness using random cluster sample technique screened 18962 estimated 71200 inhabitants district 266 found 109 blind people prevalence blindness 057 95 confidence interval 046068 main causes blindness senile cataract 55 corneal scarring due trachoma 10 uncorrected aphakia 9 openangle glaucoma 6 14 aphakic blind persons aphakia glasses 43 persons operated cataract women significantly higher prevalence blindness men age 60 years prevalence blindness increased sharply women 16 times less likely undergone cataract surgery men two effective steps reduce prevalence blindness elim district provide aphakia glasses aphakic patients improve accessibility eye departments surgical services