Name______________________________
QUIZ # 1
VS 117: Oculomotor Functions and Neurology
Spring 1998

1. (4 points) While you are riding on the moving Bart train and 1) you view buildings in a neighborhood as you pass by. You notice your neighbors car driving down the street and 2) you look at the license plate on the moving car to verify. What type of eye movements are you using to perform the first and second task?

1. Optokinetic nystagmus
2. pursuit tracking

2. (2 points) If you roll your head to toward your right shoulder your eyes counter roll toward your left shoulder. What is the technical term describing the direction of the movements of the two eyes.
levo-cyclotorsion or levo torsion

If confuse Roll with Yaw the correct answer would be levoversion (half credit)

3. (4 points) What is a skew movement?

A vertical disjunctive movement

4. (4 points) Define angle Lambda

The angle subtended by the pupillary and line of sight

5. (4 points) If you see the corneal light reflex displaced 0.5 mm nasalward in the right pupil and 2 mm temporalward in the left pupil, what is the direction and magnitude of the suspected left eye turn?

Left eso or nasalward deviation of 25 degrees or 50 prism diopters.

6. (2 points) If you held a Maddox rod with the small cylinders oriented horizontally before the left eye of the patient described in question #5, what is the orientation (horizontal or vertical) of the Maddox streak and in what direction would it appear displaced from the fixation light seen by the right eye?

Vertical streak seen to the left of the fixation point.

7. (2 points) If you performed the alternate cover test on the patient described in #5, what direction would the left eye move when you moved the cover paddle from the left eye to the right?

Temporalward or abduction or leftward

8. (4 points) What is Hering's law of ocular movements.
Movements of the two eyes are equal and symmetrical