RT Journal Article SR Electronic T1 Prevention of Blindness in Bengal JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 452 OP 452 DO 10.1136/bjo.25.9.452 VO 25 IS 9 YR 1941 UL http://bjo.bmj.com/content/25/9/452.abstract AB