RT Journal Article SR Electronic T1 THE FIRST RADIUS-FIGURE FOR SUBJECTIVE ASTIGMOMETRY JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 415 OP 415 DO 10.1136/bjo.20.7.415 VO 20 IS 7 A1 Holth, S. YR 1936 UL http://bjo.bmj.com/content/20/7/415.abstract AB