II. Optic Flashcards

1
Q

Foramen

A

Optic canal

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2
Q

Fiber Type

A

Special sensory

SSA

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3
Q

Function

A

Retina, vision

Pupillary light reflexes (with CN III)

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4
Q

Branches

A

none

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5
Q

Hemianopia (hemianopsia)

A

is a condition characterized by loss of vision (blindness) in one-half of the visual field of each eye.

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6
Q

Lesion of Optic Nerve

A

Blindness

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7
Q

Lesion of the optic chiasma caused by a pituitary tumor

A

bitemporal (heteronymous) hemianopia = loss of vision in the temporal visual field of both eyes

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8
Q

Right perichiasmal lesion such as an aneurysm of the internal carotid artery

A

blindness in the nasal field of vision of the right eye

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9
Q

Lesion of the right optic tract or optic radiation

A

left homonymous hemianopia, loss of sight in the left half of the visual field of both eyes

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10
Q

Papilledema (choked disk)

A

is an edema of the optic disk or optic nerve, often
resulting from increased intracranial pressure and increased CSF pressure or thrombosis of the central vein of the retina, slowing venous return from the retina.

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