Strabismus

Question 1

What is exotropia?

Answer 1

Exo - deviating outward

Tropia - Present when there is no disruption in binocular vision (ie: does not require cover uncover test to identify)

Question 2

What is esotropia?

Answer 2

Eso: Nasal (inward) deviation

Tropia: Present when there is no disruption in binocular vision (ie: does not require a cover uncover test to identify)

Question 3

What is esophoria?

Answer 3

Eso - Nasal (inward) deviation

Phoria - latent strabismus that is present only when binocular fusion is disrupted (picked up with cover uncover test)

Question 4

What is exophoria?

Answer 4

Exo - deviating outward

Phoria - latent strabismus that is present only when binocular fusion is disrupted (picked up with cover uncover test)

Question 5

A patient with a down and out gaze likely has palsy of which cranial nerve? Also may have ptosis and poor pupillary reaction to light

Answer 5

• Cranial nerve III

- Occulomotor

Question 6

A patient has esotropia which cranial nerve palsy could cause this? (no downward deviation)

Answer 6

Cranial nerve 6 (Abducens)

- paralysis of the lateral rectus which is responsible for moving the eye laterally