visual field defect
Also written as: VFD — visual field defect
An area of reduced or absent vision within the normal field of vision, detected by perimetry testing.
Full Definition
A visual field defect is an area of diminished or lost vision within a person's field of view, typically detected through automated perimetry testing. These defects can be caused by various conditions affecting the retina, optic nerve, or visual pathway. Common patterns include arcuate scotomas in glaucoma, altitudinal defects in optic nerve disease, and hemianopic defects in neurological conditions. The pattern and location of visual field defects help localize the underlying pathology.
Usage
Usage note: Describe the pattern, location, and severity of the defect, referencing perimetry results.
In Context
- "Automated perimetry revealed a superior arcuate visual field defect consistent with glaucoma." — Glaucoma monitoring report
- "The patient demonstrated a homonymous hemianopic visual field defect." — Neuro-ophthalmology examination