Visual Field Deficits

Question 0

Papilledema

Answer 0

Increased ICP causing the optic disc to swell due to decreased venous outflow from the eye

Question 1

Size of optic disc

Answer 1

1.5mm

Question 2

Optic disc swelling

Answer 2

Can be caused by hypertension or optic neuritis

*Common presenting sign in MS

Question 3

Relative Afferent Pupillary Defect

Answer 3

“Marcus Gunn pupil”

-Sluggish response of eye upon light stimulation usually caused by optic neuritis

Question 4

Shaken Baby Syndrome

Answer 4

Retinal hemorrhage
Papilledema
Retinal Detachment
Ecchymosis of sternum

*Long term consequences include blindness, epilepsy, axonal injury, even brainstem avulsion (not good if you want to live)

Question 5

Superior Right Retinal Quadrant

Answer 5

Project to medial portion of ipsilateral LGN

=> projects via optic radiations to cuneus gyrus of ipsilateral occipital lobe

*Represents inferior left visual field

Question 6

Lesion of temporal retinal fibers

Answer 6

Blindness in nasal visual field of ipsilateral eye; commonly caused by ICA aneurysm

Question 7

Lesion of Meyer’s Loop

Answer 7

Contralateral upper homonymous quadrantanopsia

Question 8

PCA Stroke

Answer 8

Contralateral homonymous hemianopsia w/ macular sparing

Question 9

Lesion of optic chiasm

Answer 9

Bitemporal homonymous hemianopsia

Question 10

Projection of lower right retinal field

Answer 10

Synapses in right, lateral LGN and then travels via Meyer’s Loop to the Lingual gyrus

*Represents the Upper Left Visual Field

Question 11

Macular Projection of right 1/2

Answer 11

Projects to central portion of right LGN; then projects to posterior 1/3 of cuneus and lingual gyri

*Represents the left 1/2 of macular field