RT Journal Article SR Electronic T1 Precision versus confusion. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 852 OP 853 DO 10.1136/bjo.73.10.852-a VO 73 IS 10 A1 Romano, P E YR 1989 UL http://bjo.bmj.com/content/73/10/852.2.abstract AB