NPCB&VI National Blindness survey was conducted by Community Ophthalmology, R P Centre, AIIMS, among people aged ≥ 50 years in 31 districts in India. As part of this survey, district Kadapa, Andhra Pradesh was covered. Prevalence of blindness (presenting visual acuity <3/60 in better eye) was 1.46% which was less than national average 1.99%. Prevalence of visual impairment (presenting visual acuity <6/18 in better eye) was 13.55%. Prevalence of functional low vision (FLV) in district Kadapa, Andhra Pradesh was 0.8%.
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.
| Males (%) | Females (%) | Total (%) | |
|---|---|---|---|
| Blindness | 1.50 | 1.43 | 1.46 |
| SVI | 0.94 | 2.01 | 1.50 |
| MVI | 10.30 | 10.85 | 10.59 |
| EVI | 14.10 | 13.68 | 13.88 |
| MSVI | 11.24 | 12.86 | 12.09 |
| VI | 12.74 | 14.29 | 13.55 |