Nystagmus Management

Question 1

Goals of Prism

Answer 1

improve fusion
improve convergence
reduce head turn

Question 2

Yoked prism can move the __________

Answer 2

null point

Question 3

Glasses / Contacts

Answer 3

improve VAs
lessen nystagmus
first choice in management

Question 4

Plus Adds

Answer 4

improve VAs at near
aid accommodation
bad for distance use

Question 5

Minus Adds

Answer 5

induce convergence- lessen nystagmus

Question 6

Inducing Convergence w/ Prism

Answer 6

BO

Question 7

Prism and Head Turn

Answer 7

base to same side as head turn

ex: Right head turn = bases on right side = OD BO, OS BI

Question 8

Vision Therapy

Answer 8

for fusional vergences and motor control and suppression

Question 9

Med that can reduce nystagmus

Answer 9

Gabapentin

Question 10

Kestenbaum Technique

Answer 10

surgical technique used to shift null point closer to primary position and eliminate head turn

Question 11

Dissociated Vertical Deviation

Answer 11

Spontaneous upward movement of one or both eyes when tired, broken fusion, or inattentive
only hyper, no hypo
found with infantile strabismus

Question 12

Treating Dissociated Vertical Deviation

Answer 12

surgical if large or occurs frequently

otherwise leave it

Question 13

Inferior Oblique Overaction

Answer 13

eye elevates in adduction

no deviation in primary

Question 14

Treating Inferior Oblique Overaction

Answer 14

surgery only if severe

Question 15

Pattern Strabismus

Answer 15

horizontal deviation changes in magnitude between up and down gaze
vertical and noncomitant

Question 16

V Pattern

Answer 16

More divergent in upgaze than downgaze
significant when difference is greater than 15pd
may have chin up head position

Question 17

A Pattern

Answer 17

More divergent in downgaze than upgaze
significant when difference is greater than 10pd
may have chin down head position