RT Journal Article SR Electronic T1 GLAUCOMA JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 116 OP 127 DO 10.1136/bjo.27.3.116 VO 27 IS 3 A1 T. Harrison Butler YR 1943 UL http://bjo.bmj.com/content/27/3/116.abstract AB