Eyemovements And The Perception Of Motion (6)

Question 1

How do we move our eyes

Answer 1

3 pairs of extraocular antagonistic muscles

Question 2

Main types of eye movements*

Answer 2

Vergence
Saccadic
Pursuit
VOR - vestibular ocular reflex

Question 3

Vergence movements

Answer 3

Points both foveae at a near/target further away
Prevents double vision*

During this, the eyes rotate in opposite directions

Question 4

Saccadic movements

Answer 4

Moves the foveae to a point of interest
Fast and accurate

Effectively blind during each saccade
Both eyes move together

Question 5

Pursuit movements

Answer 5

Keep foveae on a moving target
Involuntary

Question 6

VOR movements

Answer 6

Keep the image of the world stationary on the retina when we move our head

Question 7

4 ways to elicit the perception of motion*

Answer 7

Real physical movement
Apparent movement - must be just right to be seen, not too fast/slow
Induced movement e.g. moon & clouds
Motion after effects -still feel like moving after