The Visual Fields test checks your side vision. With this test, one of the eyes is patched and the patient sits in the instrument while holding a buzzer. When they think they see a light, they click the buzzer. The light then moves onto another location, eventually creating a “map” of the patient’s field of vision. Once one eye is done, the other eye is tested. This test is a very important tool for the diagnosis and management of glaucoma and other eye and brain conditions.