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. Author manuscript; available in PMC: 2018 Jul 3.
Published in final edited form as: Ophthalmic Epidemiol. 2009 Nov-Dec;16(6):400–409. doi: 10.3109/09286580903315809

TABLE 2.

Cataract surgery, presenting cataract blindness (< 20/200) and surgical coverage by age, gender, education and residence

Number examined Cataract operated
Un-operated cataract blind
Cataract blindness burden
% Surgical coverage
All operated
Presumed blind
No. Prevalence No. Prevalence No. Prevalence No. Prevalence
Age (yrs)
 50–59 2595 169 6.5 115 4.4 70 2.7 185 7.1 62.2
 60–69 1406 316 22.5 222 15.8 90 6.4 312 22.2 71.2
 70+ 737 349 47.4 289 39.2 81 11.0 370 50.2 78.1
Gender
 Male 2153 368 17.1 281 13.1 91 4.2 372 17.3 75.5
 Female 2585 466 18.0 345 13.4 150 5.8 495 19.2 69.7
Education
 Illiterate 2220 386 17.4 297 13.4 188 8.5 485 21.9 61.2
 ≤ Grade 5 1515 300 19.8 226 14.9 45 3.0 271 17.9 83.4
 Grade 6–10 671 94 14.0 64 9.5 7 1.0 71 10.6 90.1
 ≥ Grade 11 332 54 16.3 39 11.8 1 0.30 40 12.1 97.5
Residence
 Rural 3539 575 16.2 428 12.1 209 5.9 637 18.0 67.2
 Urban 1199 259 21.6 198 16.5 32 2.7 230 19.2 86.1
All 4738 834 17.6 626 13.2 241 5.1 867 18.3 72.2