What visual field defect is typically associated with toxic neuropathy?

The centrocaecal scotoma is a visual field defect that is commonly linked to toxic neuropathy, particularly in cases of nutrient deficiencies or exposure to certain toxins. This type of scotoma manifests as a central region of vision being lost, while peripheral vision remains intact.

Toxic neuropathy can lead to damage in the optic nerve or the visual pathways, and one of the notable causes is vitamin B12 deficiency. This deficiency may result in damage to the optic nerve, producing a specific type of visual field loss characterized by a scotoma that affects both central and near-central vision.

The distinction of the centrocaecal scotoma lies in its occurrence around the blind spot and central vision area, which differentiates it from other types of scotomas typically associated with different pathologies. Understanding the nature of visual field defects aids in diagnosing underlying systemic conditions, often linked to nutritional deficiencies or toxic exposures.