TY - JOUR T1 - Essential Ophthalmology JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 67 LP - 68 DO - 10.1136/bjo.67.1.67-b VL - 67 IS - 1 AU - Stephen Miller Y1 - 1983/01/01 UR - http://bjo.bmj.com/content/67/1/67.3.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -