The term "visual field" refers to the entire area that can be seen when the eyes are fixed in one position. It includes everything visible to the left, right, above, and below the central point of focus. The visual field is crucial for activities like reading, driving, and sports, as it helps individuals detect movement and objects around them. Visual fields can be measured using various tests, often conducted by eye care professionals like optometrists or ophthalmologists. These tests help identify any blind spots or areas of reduced vision, which can indicate underlying conditions such as glaucoma or retinal diseases.