Sector or arcuate defects, bilateral

This code describes a visual field defect characterized by an arc-shaped or wedge-shaped loss of vision affecting both eyes. These defects typically follow the distribution of nerve fibers in the retina, often associated with conditions like glaucoma or optic nerve damage.

Use this code when documentation specifies bilateral sector or arcuate visual field defects, often identified through perimetry testing. This code is appropriate when the laterality is explicitly stated as bilateral, indicating involvement of both eyes.

• Ensure documentation clearly specifies "bilateral" involvement; otherwise, use the appropriate unilateral code.
• Distinguish from other visual field defects like generalized constriction or scotomas, which have different ICD-10-CM codes.
• Always sequence this code after the underlying cause of the visual field defect, if known (e.g., glaucoma).