RT Journal Article SR Electronic T1 ABSTRACTS JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 585 OP 599 DO 10.1136/bjo.20.10.585 VO 20 IS 10 YR 1936 UL http://bjo.bmj.com/content/20/10/585.abstract AB