RT Journal Article SR Electronic T1 DR. GORDON NORRIE JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 441 OP 442 DO 10.1136/bjo.29.8.441 VO 29 IS 8 A1 R. R. J. YR 1945 UL http://bjo.bmj.com/content/29/8/441.abstract AB