TY - JOUR T1 - ABSTRACTS JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 310 LP - 314 DO - 10.1136/bjo.20.5.310 VL - 20 IS - 5 A2 - , Y1 - 1936/05/01 UR - http://bjo.bmj.com/content/20/5/310.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -