RT Journal Article SR Electronic T1 Orbit Roentgenology JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 141 OP 141 DO 10.1136/bjo.63.2.141-a VO 63 IS 2 A1 Glyn A. S. Lloyd YR 1979 UL http://bjo.bmj.com/content/63/2/141.2.abstract AB