PREVALENCE AND INCIDENCE OF BLINDNESS DUE TO AGE-RELATED CATARACT IN THE RURAL-AREAS OF SOUTH-AFRICA

Objectives. The Bureau for the Prevention of Blindness is responsible for the provision of cataract surgery to the rural indigent population of South Africa. It is important for the Bureau to know both the prev alence and the incidence of cataract blindness in the population. Desi gn, setting and subjects. Blindness prevalence surveys were conducted in KwaZulu in 1990 and 1993. Outcome measures and results. The prevale nce of cataract blindness was 0,59% (95% confidence interval 0,21) in 1990 and 1993. The prevalence of aphakia was 0,1% in 1990 and 0,2% in 1993, demonstrating a probable increase in the delivery of cataract su rgical services, although this had not produced a demonstrable fall in the prevalence of cataract blindness. The calculated annual incidence of cataract blindness was 0,14%. Conclusion. Among a rural population of approximately 19 million South Africans, there is a backlog of 113 000 unoperated cataract-blind people and an incidence of 27 000 new c ataract blind per year. The implications of this backlog for cataract blindness in our rural areas are discussed.