RT Journal Article SR Electronic T1 ANNOTATION JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 740 OP 740 DO 10.1136/bjo.23.11.740 VO 23 IS 11 YR 1939 UL http://bjo.bmj.com/content/23/11/740.1.abstract AB