Journal article

Spatial Summation Properties for Magnocellular and Parvocellular Pathways in Glaucoma

Josephine Battista, David R Badcock, Allison M McKendrick

INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE | ASSOC RESEARCH VISION OPHTHALMOLOGY INC | Published : 2009

Abstract

PURPOSE: To examine the spatial summation properties for the magnocellular (M) and parvocellular (P) visual pathways in participants with glaucoma and approximately age-matched controls in central and midperipheral retinal eccentricities. METHODS: Contrast discrimination thresholds were measured for six different stimulus array sizes, using steady- and pulsed-pedestal paradigms designed to measure function of the M and P pathways, respectively. This study involved 15 participants with glaucoma and 17 approximately age-matched controls. All participants completed trials foveally and at 12.5 degrees eccentricity. The peripheral stimulus location for each glaucoma participant was within a quadr..

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