RT Journal Article SR Electronic T1 F. T. Ridley, MSc, MB, BS, FRCS JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 368 OP 368 DO 10.1136/bjo.61.5.368-a VO 61 IS 5 YR 1977 UL http://bjo.bmj.com/content/61/5/368.2.abstract AB