Social & Preventive Medicine WHO definition of blindness? A visual acuity less than 3/60 or its equivalent B visual acuity less than 1/60 or its equivalent C visual acuity less than 6/18 or its equivalent D visual acuity less than 6/60 or its equivalent 💡 Explanation WHO definition of blindness? ✓ Correct Answer: A. visual acuity less than 3/60 or its equivalent