The WHO definition for blindness is the inability of counting fingers in daylight at a minimum distance of -: (A) 3 feet, (B) 6 feet, (C) 3 metres, (D) 6 metres
Answer is C. WHO definition blindness - inability to count fingers in day light at a distance of 3 metres or visual acuity less than 3/ 60 or its equivalent. Ref- Park&;s textbook of Preventive and social medicine 23rd edition. .