To facilitate the screening of visual-acuity, WHO defines blindness as counting fingers at a distance of: September 2006 and September 2010
Ans. B: 3 meters The WHO proposed a uniform criterion and defined blindness as "visual acuity of less than 3/ 60 (Smellen) or its equivalent" . In order to facilitate the screening of Visual acuity by non-specialized personnel, in the absence of appropriate vision chas, the WHO has now added the "inability to count fingers in daylight at a distance of 3 meters" to indicate less than 3/60 or its equivalent.
1 meter
3 meters
6 meters
9 meters