RT Journal Article SR Electronic T1 Orthoptie pratique JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 770 OP 770 DO 10.1136/bjo.58.8.770-a VO 58 IS 8 A1 Peter Fells YR 1974 UL http://bjo.bmj.com/content/58/8/770.2.abstract AB