RT Journal Article SR Electronic T1 ABSTRACTS JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 52 OP 70 DO 10.1136/bjo.1.1.52 VO 1 IS 1 YR 1917 UL http://bjo.bmj.com/content/1/1/52.abstract AB