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Visual-Field Defects -  BINASAL HEMIANOPIA Lecture 8 of 14  NEXT»

This condition comprises defects in the nasal half of visual fields, usually incomplete. This condition is due to lateral involvement of chiasm; it presupposes bilateral lesions.

1. Bilateral occipital lesion (thrombosis)
2. Chiasmic arachnoiditis, postneuritic optic atrophy, and bilateral retrobulbar neuritis of multiple sclerosis
3. Damage to chiasm
4. Drusen of optic nerve (see p. 559)
5. Fusiform aneurysms-arteriosclerotic or congenital-of internal carotid artery
6. Glaucoma
7. Meningiomas, especially from the lesser wing of the sphenoid bone
8. Nasal quadrant peripheral depression of glaucoma-bilateral and reasonably symmetrical
9. Pituitary tumor with third ventricle dilatation pushing laterally
10. Retinal damage
11. Severe exsanguination
12. Sclerotic plaques of internal carotid artery or anterior cerebral arteries
13. Symmetric lesions in the temporal halves of both retinas, such as severe retinal edema associated with diabetic retinopathy
14. Trauma

Cox TA, et al. Unilateral nasal hemianopia as a sign of intracranial optic nerve compression. Am J Ophthalmol 1981; 92:230-232.

Harrington DO, Drake MV. The visual fields: text and atlas of clinical perimetry, 6th ed. St. Louis: CV Mosby, 1990.

Pau H. Differential diagnosis of eye diseases, 2nd ed. New York: Thieme Medical, 1988

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