RT Journal Article SR Electronic T1 ANNOTATIONS JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 42 OP 44 DO 10.1136/bjo.28.1.42 VO 28 IS 1 YR 1944 UL http://bjo.bmj.com/content/28/1/42.abstract AB