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What are the different types of Contrast Tests?

Contrast sensitivity is a person’s ability to see low contrast images in the real-world, such as a street sign on a dark roadway, a flower pot sitting on the floor of a dimly lit garage or the size of the step height for a sidewalk at night. Contrast sensitivity is unlike the visual acuity test, “Big E Chart,” which measures only how well a person can identify high contrast black-on- white letters. Using low contrast images, contrast sensitivity testing can detect subtle changes in vision that are hidden by visual acuity. Many studies show contrast sensitivity testing is useful for evaluating a wide range of patients, including patients with: www.vectorvision.com