RT Journal Article SR Electronic T1 CORRESPONDENCE JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 253 OP 253 DO 10.1136/bjo.9.5.253 VO 9 IS 5 A1 Thomson, Ernest YR 1925 UL http://bjo.bmj.com/content/9/5/253.1.abstract AB