According to the impairment table, what is the primary impairment type for Glaucoma?

Visual Field (Peripheral loss)

The comparison table clearly maps specific eye conditions to their primary mode of impairment. Glaucoma, which damages the optic nerve, primarily manifests as a loss of the visual field. Specifically, the text notes that glaucoma leads to a progressive loss of peripheral vision first, meaning the patient loses the ability to see things outside of their direct central gaze. This contrasts sharply with conditions like AMD, which primarily attacks visual acuity by creating central vision deficits. Because the damage to the optic nerve is permanent, the resulting visual field loss in glaucoma is considered low reversibility, meaning treatment focuses on management rather than restoration of lost sight.