Chapter contents
Overview
Sensory transduction
Central course
Primary visual cortex
Retinal deficits
Optic nerve damage
Chiasm damage
Damage posterior to chiasm
| Cranial Nerve II - Optic Nerve | Page 9 of 11 |
Clinical correlation - damage to the optic chiasm
Damage to the medial aspect of the optic chiasm, as is often seen with a pituitary gland tumor, may compromise the decussating fibers from both nasal hemiretinas.
The loss of peripheral vision in both eyes is called bitemporal hemianopia.
Figure 2-9a. Bitemporal hemianopia.
Damage to the lateral aspect of the optic chiasm, as may occur in the case of an aneurysm of the internal carotid artery, will affect the fibers of the ipsilateral temporal hemiretina (nasal visual field).
Figure 2-9b. Temporal hemiretina (nasal visual field).
