!"% VISUAL IMPAIRMENT AND BLINDNESS TABLE 4-9. DISTRIBUTION, ESTIMATED NUMBER OF CASES, AND PREV- ALENCE OF UNILATERAL BLINDNESS BY AGE GROUP (NBS 1981) Estimated Number of Cases Percentage of Nepal's Total Age Group Sample N Prevalence (per 100) 0-4 5-9 10-19 20-39 40-59 Over 60 Subtotal 5,793 6,350 8,436 10,345 6,162 2,443 39,529 358 2,025 5,908 14,740 48,696 69,025 92,806 233,200 412 0.10 0.28 0.49 1.25 3.15 10.98 1.66 NA 0.9% 2.5 6.3 20.9 29.6 39.8 100.0 NA Missing Total 39,887 233,612 1.66 100.0 Source: FR4.002 AN.27M TABLE 4-10. DISTRIBUTION, ESTIMATED NUMBER OF CASES, AND PREV- ALENCE OF BLINDNESS IN ONE OR BOTH EYES BY AGE GROUP (NBS 1981) Estimated Number of Cases Percentage of Nepal's Total Age Group Sample N Prevalence (per 100) 0-4 5-9 10-19 20-39 40-59 Over 60 Subtotal 5,793 6,350 8,436 10,345 6,162 2,443 39,529 358 2,354 7,651 18,949 58,715 97,480 165,262 350,411 824 0.12 0.36 0.62 1.51 4.44 19.56 2.49 NA 0.7% 2.2 5.4 16.7 27.8 47.2 100.0 NA Missing Total 39,887 351,235 2.49 100.0 Source: FR4.002 AN.17M alence rate despite the higher risk of some form of blindness related to poverty, occupation, diet, etc. For this reason, in much of this chapter and in certain other chapters, age-adjusted prevalence rates will be shown for blindness, cataract, and other age-related dis- eases. In certain tables age- and sex-adjusted prevalence rates will be shown (for example to compare cataract prevalence in the Eastern Hills and Western Terai) to account for differences in age
