RT Journal Article SR Electronic T1 Binocular Vision JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 636 OP 637 DO 10.1136/bjo.64.8.636-c VO 64 IS 8 A1 Peter Fells YR 1980 UL http://bjo.bmj.com/content/64/8/636.4.abstract AB