TY - JOUR T1 - DAVID LEIGHTON DAVIES JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 331 LP - 332 DO - 10.1136/bjo.29.6.331 VL - 29 IS - 6 A2 - , Y1 - 1945/06/01 UR - http://bjo.bmj.com/content/29/6/331.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -