Eye movements and Squints Flashcards Preview

Y2 Ophthalmology > Eye movements and Squints > Flashcards

Flashcards in Eye movements and Squints Deck (17):
1

What are the alternative names for squints? (2)

stabismus, tropia

2

What is a convergent squint also known as?

Esotropia

3

Which is the most common type of squint?

Esotropia - convergent

4

What is the cause of a convergent squint?

no cause or associated hypermetropia

5

What is hypermetropia?

long-sightedness

6

What is a consequence of allowing a squint to be left untreated, particularly in children?

the brain will start to favour the clearer eye and thus stop developing the visual pathway of the poorer eye

7

What is a divergent squint also known as?

Exotropia

8

Which group is a divergent squint most common in?

older children, often intermittent

9

2 Diagnostic tests for squints?

1. Corneal reflections - the reflections of a bright light should be symmetrical on each cornea 2. Cover test - movement of the uncovered eye to fixation when unaffected eye is covered

10

What are the 3 Os of managing squints?

Optical, Orthoptic, Operation

11

What is the optical management of a squint?

Assess and correct any refractive errors - no child is too young

12

How are squints managed orthoptically?

Patching the good eye encouraging the use of the eye that squints

13

How are squints managed surgically?

resection or recession of a rectus muscle helping alignment

14

What is a paralytic squint?

diplopia is most on looking in the direction of pull of the paralysed muscle

15

Features of a third nerve palsy

ptosis (drooping eye lid), proptosis (as recti less toned), fixed pupil dilation, eye looks down and out

16

Features of a trochlear nerve palsy - CN IV

Diplopia, may hold head tilted, cannot look down and in

17

Features of sixth nerve palsy

diplopia in horizontal plane, eye medially deviated and cannot move laterally