Question

Give the definition of blindness as per NPCB and WHO. [2+2]

Hint:

Blindness is defined as a visual acuity of less than 3/60 in the better eye, with best possible correction, by both the WHO and NPCB.

Answer 1

Step 1: Definition of Blindness as per NPCB and WHO.
(1) NPCB Definition (National Programme for Control of Blindness):
- In India, the NPCB defines blindness as visual acuity less than 3/60 in the better eye with best possible correction, or a field of vision less than 10 degrees in the better eye. This definition is used for national blindness prevention and control programs.
(2) WHO Definition (World Health Organization):
- According to the World Health Organization (WHO), blindness is defined as visual acuity less than 3/60 in the better eye with best possible correction, or visual field less than 10 degrees in the better eye, similar to the NPCB.
- WHO also classifies low vision as visual acuity between 3/60 and 6/18 in the better eye with the best possible correction.