The visual field refers to the total area in which objects can be seen in the side (peripheral) vision as you focus your eyes on a central point. The visual field can be tested in a few different ways, including the confrontational visual field test, tangent screen test, and automated perimetry test.
A visual field test consists of a spot of light, flashed in various areas repeatedly in the peripheral vision by a medical professional. The visual field test shows how well the central and peripheral vision performs. If a colleague or employee has been diagnosed with glaucoma or a medical professional detects early signs, it is advised to conduct a visual field test.