RT Journal Article SR Electronic T1 ABSTRACTS JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 140 OP 148 DO 10.1136/bjo.24.3.140 VO 24 IS 3 YR 1940 UL http://bjo.bmj.com/content/24/3/140.abstract AB