1. Central scotoma |
Loss of central vision |
Inflammation of the optic disk (optic neuritis) or optic nerve (retrobulbar neuritis) |
2. Total blindness of the right eye |
Complete loss of vision in the right eye |
Complete lesion of the right optic nerve |
3. Bitemporal hemianopia |
Loss of vision in the outer (temporal) halves of the visual field in both eyes |
Pressure exerted on the optic chiasm by a pituitary tumor |
4. Right nasal hemianopia |
Loss of vision in the inner (nasal) half of the visual field in the right eye |
Perichiasmal lesion (e.g., calcified internal carotid artery) |
5. Right homonymous hemianopia |
Loss of vision in the right visual field of both eyes |
Lesion of the left optic tract |
6. Right homonymous superior quadrantanopia |
Loss of vision in the upper right quadrant of the visual field of both eyes |
Partial involvement of the optic radiation by a lesion in the left temporal lobe (Meyer loop) |
7. Right homonymous inferior quadrantanopia |
Loss of vision in the lower right quadrant of the visual field of both eyes |
Partial involvement of the optic radiation by a lesion in the left parietal lobe |
8. Right homonymous hemianopia |
Loss of vision in the right visual field of both eyes |
Complete lesion of the left optic radiation (similar defect may also result from lesion 9) |
9. Right homonymous hemianopia (with macular sparing) |
Loss of vision in the right visual field of both eyes, sparing the macula |
Posterior cerebral artery occlusion |