<prompt> According to WHO, blindness is defined as a visual acuity of the better eye, less than660.560.460.360.  <response>: BlindnessWHO has proposed a uniform criterion and defined blindness as Visual acuity of less than 360 or its equivalent.In the absence of appropriate vision charts, the WHO has now added the inability to count fingers in daylight at a distance of 3 meters to indicates less than 360 or its equivalent. 