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HVF Test

March 17, 2022 62 people Latest news

If you have been diagnosed with glaucoma, chances are, you will have taken several visual field tests. This test helps your doctor detect and monitor glaucoma. Usually, the visual field test is taken once a year but depending on the severity of your glaucoma, your doctor may decide to check your visual field more frequently. A visual field test maps out what your world looks like to you. It measures the area of vision, or how wide of an area your eye can see. Glaucoma is often called “The Sneak Thief of Sight” because it usually is a painless process that mostly affects the peripheral, or side vision, first. The visual field shows changes that are not noticed by the patient until the damage is severe. Other diseases, such as cataracts, stroke, macular degeneration, and diabetes, can also influence the visual field. Your doctor will take these possible effects on your exam when interpreting the results. There are different types of visual field tests. The one most commonly used in the United States is the Humphrey visual field, which consists of a center fixation light and blinking test lights in your side vision. It is important when taking this test that you concentrate on the fixation light in the center and press the button when the blinking test light is seen with your side vision. If you move your eyes to follow or look for the blinking lights, it decreases the reliability of the test and the ability of your doctor to monitor your disease.

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