What is a Visual Field test?

Visual field testing is used to diagnose and monitor patients with glaucoma, intracranial tumors, and other causes of raised intracranial pressures, and neurological diseases affecting the visual pathways including strokes and pituitary lesions. The commonest visual field test is called Computerized Perimetry and uses a machine to map out the threshold sensitivities of patients’ peripheral vison. This test requires a dark room and the patient to be able to concentrate on a screen for approximately 15 minutes per eye.