Visual Information, Deficits, & Pathways

Loss of vision in one or both eyes

Anopsia

loss of vision in half of a visual field in each eye

Hemianopsia

what type of Hemianopsia has same visual field in each eye (right or left)

Homonymous

loss of quadrant of a visual field (Will be superior or inferior depending on which bank of calcarine sulcus affected)

Quadrantopia

phenomenon associated with lesions in the visual cortex

Macular sparing

a pituitary tumor most likely will sit in the

cels circa

optic nerves cross right next to

pituitary gland

a tumor on pituitary gland can compress the

optic nerve

Affects optic chiasm, lose peripheral vision (not affected temporal), associated with pituitary tumors

Bilateral Temporal Hemianopia

Optic tract

o Total loss of visual field contralateral to lesion

Contralateral Homonymous Hemianopia

superior visual field hits the

inferior retina, continues to meyers loop to inferior of calcarine fissure

inferior visual field hits the

superior retina, continues to superior trajectory to superior of calcarine fissure

Total loss of visual field contralateral to lesion due to lesion in the visual cortex

 Usually, macula is spared

Contralateral Homonymous Hemianopia (with Macular Sparing)

Lesion of the occipital cortex may produce

macular-sparing homonymous hemianopia

macular-sparing homonymous hemianopia is most often seen

in cerebrovascular accident involving the posterior cerebral artery.

damage to the optic nerve will cause

total blindness of that eye