RT Journal Article SR Electronic T1 CORRIGENDA JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 254 OP 254 DO 10.1136/bjo.42.4.254 VO 42 IS 4 YR 1958 UL http://bjo.bmj.com/content/42/4/254.abstract AB