RT Journal Article SR Electronic T1 ABSTRACTS JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 324 OP 334 DO 10.1136/bjo.5.7.324 VO 5 IS 7 YR 1921 UL http://bjo.bmj.com/content/5/7/324.abstract AB