RT Journal Article SR Electronic T1 ANNOTATION JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 97 OP 98 DO 10.1136/bjo.28.2.97 VO 28 IS 2 YR 1944 UL http://bjo.bmj.com/content/28/2/97.abstract AB