RT Journal Article SR Electronic T1 ANNOTATION JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 269 OP 269 DO 10.1136/bjo.29.5.269 VO 29 IS 5 YR 1945 UL http://bjo.bmj.com/content/29/5/269.1.abstract AB