<prompt> All of the following is true regarding blindness except -There is estimated 45 million people blind world-wide20 of cases blindness in India is due to cataractMost common cause of blindness in India is cataractVisual acuity less than 360 is blindness  <response>: 62.6 cases blindness in India is due to cataract 19.7 due to refractive error. Ref- Park;s textbook of Preventive and social medicine 23rd edition. 