TY - JOUR T1 - Ophtalmologie JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 250 LP - 251 DO - 10.1136/bjo.38.4.250-c VL - 38 IS - 4 A2 - , Y1 - 1954/04/01 UR - http://bjo.bmj.com/content/38/4/250.4.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -