Perimetry screening test performed on both eyes for visual field defects, or to evaluate remining visual acuity or disability in glaucoma patients. It is conducted at a fixed brightness of 10dB across the entire retina on a visual field analyzer or a computerized machine. The patient is required to press a button as they look straight ahead in response to small, flashing lights. This test has a longer stimulation duration and is useful for testing the suitability of drivers.