Visual field testing is a procedure used to measure a person's peripheral vision and overall visual field. It helps detect any blind spots or vision loss that may indicate underlying eye conditions, such as glaucoma or retinal diseases. During the test, patients focus on a central point while lights or objects appear in different areas of their vision. The results of visual field testing can assist eye care professionals in diagnosing and monitoring eye health. This test is often performed in a clinical setting using specialized equipment, ensuring accurate measurements of a person's visual capabilities.