TY - JOUR T1 - THE PHOTOPIC LUMINOSITY CURVE AND VISUAL PURPLE JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 505 LP - 508 DO - 10.1136/bjo.33.8.505 VL - 33 IS - 8 AU - L. C. Thomson Y1 - 1949/08/01 UR - http://bjo.bmj.com/content/33/8/505.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -