Contrast Sensitivity Measurements, Interpretation and Modifications

Goals  Review types of contrast sensitivity tests and their measurements  Discuss how contrast sensitivity tests should be interpreted  Discuss environmental and patient centered modifications Vision  Ability to see details, objects and their environment  Typically measured with high contrast charts  Snellen most common test in primary care  Test is typically given at 20 foot distance  Using visual acuity charts measures ability of patient to see details  Good measurement of spectacle blur  Does not give functional or descriptive picture of how well patient sees Vision  Despite good visual acuity patients may still have complaints that far outweigh their performance on acuity testing