RT Journal Article SR Electronic T1 Correction JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 383 OP 383 DO 10.1136/bjo.80.4.383 VO 80 IS 4 YR 1996 UL http://bjo.bmj.com/content/80/4/383.1.abstract AB