Nystagmus

Question 1

Nystagmus

Answer 1

involuntary rhythmic oscillations of one or both eyes

Question 2

Jerk Nystagmus

Answer 2

slow drift followed by quick corrective saccade

characterized by direction of fast mvmt

Question 3

Pendular Nystagmus

Answer 3

back and forth mvmt of equal velocity

Question 4

Vertical Nystagmus

Answer 4

REFER

Question 5

Fast Frequency of Movement

Answer 5

> 2Hz

Question 6

Slow Frequency of Movement

Answer 6

< 2 Hz

Question 7

Null Point

Answer 7

intensity of nystagmus diminishes

VAs improve

Question 8

Occlusion

Answer 8

fast phase is toward uncovered eye

Question 9

Ant Seg conditions associated with Nystagmus

Answer 9

congenital cataracts
congenital glaucoma
iridocorneal dysgenesis

Question 10

Foveal Hypoplasia

Answer 10

associated w/ nystagmus, common w/ albinism
decreased VAs
very little foveal depression on OCT

Question 11

Optic Nerve Disorders associated with Nystagmus

Answer 11

coloboma of ON head

ON hyperplasia

Question 12

Retinal Disorders associated with Nystagmus

Answer 12

toxoplasmosis

Question 13

Symptoms of Nystagmus

Answer 13

worse VAs/ blurred vision
asthenopia
diplopia
headaches
virtigo
oscillopsia

Question 14

Testing VAs

Answer 14

fog one eye to do monocularly (+2 to +5)

Question 15

Refractive Error

Answer 15

cycloplege to detect significant error

Question 16

Sensory Testing

Answer 16

Worth 4 Dot to test for suppression

Question 17

Pressures

Answer 17

NCT or tonopen

GAT if oscillations allow

Question 18

Recent onset of nystagmus

Answer 18

neuro referral

Question 19

Conditions that cause nystagmus that do not need a neuro referral

Answer 19

albinism

aniridia