National Blindness Survey was conducted by Dr R P Centre for Ophthalmic Sciences in collaboration with National Programme for Control of Blindness and Visual Impairment, Govt of India using RAAB 6+ DR methodology. Nationwide representative survey was conducted among people aged ≥ 50 years in 31 districts of 24 States/Union territories of India from 2015-19. Out of 93,018 enumerated individuals 85,135 persons were examined. Prevalence of Blindness was 1.99%, SVI 1.96%, MVI 9.81%, EVI 12.92%, MSVI 11.77% and VI 13.76%. Prevalence of FLV was 1.03% and that of pinhole blindness was 1.75%.
Presenting visual acuity < 3/60 in better eye
Presenting visual acuity < 6/60 – 3/60 in better eye
Presenting visual acuity < 6/18 – 6/60 in better eye
Presenting visual acuity < 6/12 – 6/18 in better eye
Presenting visual acuity <6/18-3/60 in better eye
Presenting visual acuity < 6/18 in better eye
A person with impairment of visual functioning even after treatment and/or standard refractive correction, and a visual acuity of less than 6/18 to light perception, or a visual field of less than 10 degree from the point of fixation.
Cataract Surgical Coverage (Person) indicates how many persons received cataract surgery (one or both eyes) among all who were bilaterally pinhole blind due to cataract.
The numerator includes persons with one operated and one pinhole blind eye and persons with bilateral (pseudo) aphakia. The denominator includes the numerator, plus persons bilaterally pinhole blind due to cataract. Besides this, the indicator can also be calculated separately for PinVA <6/60 and <6/18.
Cataract Surgical Coverage (Eye) measures the proportions of eyes pinhole blind due to cataract, which have been operated so far.
The numerator includes all (pseudo) aphakic eyes. The denominator includes the numerator, plus eyes pinhole blind due to cataract. Besides this, the indicator can also be calculated separately for PinVA <6/60 and <6/18.
| Male ≥ 50 years N=106336319 | Female ≥ 50 years N=105588266 | Total ≥ 50 years N=211924583 |
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|---|---|---|---|---|---|---|
| Prevalence % | Estimated Number | Prevalence % | Estimated Number | Prevalence % | Estimated Number | |
| Blindness | 1.67 | 1775817 | 2.31 | 2439089 | 1.99 | 4217299 |
| SVI | 1.60 | 1701381 | 2.32 | 2449648 | 1.96 | 4153722 |
| MVI | 9.21 | 9793575 | 10.41 | 10991738 | 9.81 | 20789802 |
| EVI | 11.90 | 12654022 | 13.94 | 14719004 | 12.92 | 27380656 |
| MSVI | 10.82 | 11505590 | 12.73 | 13441386 | 11.77 | 24943523 |
| VI | 12.49 | 13281406 | 15.04 | 15880475 | 13.76 | 29160823 |
| FLV | 0.93 | 988928 | 1.13 | 1193147 | 1.03 | 2182823 |
| Pinhole Blindness | 1.43 | 1520609 | 2.07 | 2185677 | 1.75 | 3708680 |