RT Journal Article SR Electronic T1 Erratum JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 730 OP 730 DO 10.1136/bjo.60.10.730-a VO 60 IS 10 YR 1976 UL http://bjo.bmj.com/content/60/10/730.2.abstract AB