What is a visual field test used to assess?

A visual field test is specifically designed to evaluate peripheral vision, which refers to the ability to see objects outside of one’s direct line of sight. This type of testing is crucial in identifying any blind spots or weaknesses in the peripheral field, which can be indicative of various ocular conditions, such as glaucoma or retinal damage. During the test, patients are typically asked to focus on a central point and indicate when they see flashes of light or objects in their peripheral vision.

The emphasis on peripheral vision highlights the importance of this aspect of visual function in diagnosing and monitoring conditions that may affect one's overall visual capability. Other aspects of vision, such as color perception, depth perception, and acute or central vision, are not the focus of visual field testing, making this choice the most accurate description of the purpose of the test.