Cataract Blindness Prevalence

The prevalence of cataract blindness was higher in punjab province in rural areas and among illiterate participants.

Cataract blindness prevalence.

Cataract was the leading cause of blindness 79 4. The high degree of variation among the results in this figure is likely due to in part to methodological disease definition and population differences among the studies. Good visual outcome in the cataract operated eyes was 62 presenting and 75 2 best corrected. Cataract prevalence and magnitude.

The pooled prevalence rate of cataract blindness including post surgical cases by best corrected visual acuity bcva 0 05 among middle aged and older chinese was 2 30 95 ci 1 72 3 07 and. Prevalence rates ranged from 2 8 in proyecto ver to 29 5 in ucla mec. Blindness was more prevalent in the older age group and in women. A total of 289 participants were blind with cataract as the cause crude prevalence 1 75 95 ci 1 55 to 1 96 table 1 1.

Figure 1 below shows the estimated prevalence rate for cataract from the seven studies reviewed in this section. Sample size was calculated on the basis of estimating a blindness prevalence of 8 with an error bound precision of 15 with 95 confidence. Assuming an examination response rate of 85 and a design effect of 2 0 to account for the cluster sampling design a sample size of 4514 persons 50 years of age is required.