Nerve fibre bundle visual field defects and intracranial mass lesions

Area of Science:

• Ophthalmology
• Neurology
• Neuro-ophthalmology

Background:

• Nerve fibre bundle visual field defects typically indicate optic nerve head or retinal pathology.
• Intracranial mass lesions can affect visual pathways anterior to the optic chiasm.

Observation:

• This study examined six eyes from four patients with large intracranial mass lesions.
• Visual field defects were observed in these patients.

Findings:

• Nerve fibre bundle visual field defects were present in patients with intracranial mass lesions.
• Visual acuity was spared in three of the affected eyes.
• The contralateral (opposite) eye's visual function did not help localize the intracranial lesion.

Implications:

• Intracranial mass lesions should be considered in the differential diagnosis of nerve fibre bundle visual field defects, even with preserved visual acuity.
• Relying solely on the contralateral eye for localization may be misleading in such cases.
• This highlights the importance of comprehensive neuro-ophthalmic examination for intracranial pathologies.