You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The WHO definition for blindness is the inability of counting fingers in daylight at a minimum distance of - and explain in detail?
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. .