RT Journal Article SR Electronic T1 Coding System for Disorders of the Eye JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 576 OP 576 DO 10.1136/bjo.53.8.576 VO 53 IS 8 YR 1969 UL http://bjo.bmj.com/content/53/8/576.abstract AB