RT Journal Article SR Electronic T1 Prevalence of blindness in children JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 1537 OP 1538 DO 10.1136/bjophthalmol-2012-302563 VO 96 IS 12 A1 Crewe, Julie Mary A1 Morlet, Nigel A1 Lam, Geoff A1 Semmens, James Bernard YR 2012 UL http://bjo.bmj.com/content/96/12/1537.abstract AB