RT Journal Article SR Electronic T1 Preventing blindness: seeing is believing JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1 OP E2 DO 10.1503/cmaj.111480 VO 184 IS 1 A1 Ken Flegel A1 Noni E. MacDonald A1 Matthew B. Stanbrook A1 Astika Kappagoda A1 Paul C. Hébert YR 2012 UL http://www.cmaj.ca/content/184/1/E1.abstract