[053] Visual And Vestibular Ocular Reflex

Question 1

What is Optokinetic Reflex (OKR) driven by

Answer 1

Ocular (eve movement) reflex
Movements of visual field

Question 2

What is vestibule-ocular reflex (VOR) driven by

Answer 2

Ocular reflex
Driven by movements of head

Question 3

What is nystagmus

Answer 3

Oscillatory movements of eyes

Question 4

What is rapid eye movement called

Answer 4

Saccade

Question 5

What is known as optokinetic nystagmus

Answer 5

Alternating slow and fast phase eye movements while moving through a visual scene
Is completely normal

Question 6

Which reflex is a main contributor to stabilising gaze when moving heads

To easily keep fixation — gaze stabilised on point of interest

Answer 6

Vestibulo-ocular refles (VOR)

Question 7

To deal with moving targets and moving heads, which ocular reflexes are used?

Answer 7

Vestibulo-ocular reflex (VOC) and opto kinetic reflex (OKR)

Question 8

Name some examples of nystagmus

Answer 8

• optokinetic nystagmus
• rotational nystagmus, driven by vestibulo-ocular reflex
• post-rotatory nystagmus, driven by rotational after-effects