Good peripheral vision is essential to everyday life eg driving. Testing your peripheral and central vision area (visual field) can help to detect neurological conditions and glaucoma.
Since the optic nerve travels from the back of the eye to the back of the brain, any compression will result in a loss of visual field. By the shape and size of the visual field loss and whether it is in one or both eyes it can be determined where the lesion affecting the optic nerve is situated.
The most important area is the central 30 degrees. There are several methods of testing the visual field; most involve the patient looking into an illuminated bowl and detecting little light flashes.
The Henson 6000 is used at all 4 practices at Optivision.