Visual Field

The total area visible to a person when their eyes are fixated on a central point, including both central and peripheral vision. Visual field can be measured in degrees and is assessed through perimetry testing. Various eye conditions affect the visual field differently: glaucoma typically causes peripheral field loss, macular degeneration causes central field loss, hemianopia affects one half of the field, and diabetic retinopathy can cause scattered areas of loss. Understanding a person's visual field pattern is essential for designing effective rehabilitation strategies and accessible technologies.