Cafe Cataracts Clear Lens Repl. Home Pre-Surgical Glare Testing One of the earliest symptoms of cataracts is glare at night.
Glare occurs when light enters the eye and bounces off an opacity such as a cataract.
Most cataract patients first notice glare when looking at headlights. The glare test is used to assess visual function when looking at bright lights. While looking at an eye chart, lights are introduced that simulate the effect of bright sunlight or nighttime glare. The results of the test are important when considering cataract surgery. This is because some patients without a significant decrease in vision under normal lighting conditions notice that their vision drops considerably in sunlight or when looking at lights.