Strabismus – Questions

1: what is the definition of Squint?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1A: Misalignment of the visual axes.

2: What are the two types of squint and how common / rare are they?

 

 

 

 

 

 

 

 

 

 

2A:  Concomitant (common)
and Paralytic (rare)

 

3: What is Concomitant Squint due to?

 

 

 

 

 

 

 

 

 

 

3A:  Concomitant squint is due to an imbalance in the extraocular muscles
convergent is more common than divergent

 

 

4: What is Paralytic squint due to?

 

 

 

 

 

 

 

 

 

 

4A:  Due to paralysis of extraocular muscles

 

5: What two tests are used in detecting squint?

 

 

 

 

 

 

 

 

 

 

5A: The corneal light reflection test and the cover test.

 

6: Describe the corneal light reflection test

 

 

 

 

 

 

 

 

 

 

 

 

 

6A: Used to detect squint:  holding a light source 30cms from the child’s face to see if the light reflects symmetrically on the pupils.

 

7: What is the point of the cover test?

 

 

 

 

 

 

 

 

 

 

 

 

7A: The cover test is used to identify the nature of the squint

 

8: Describe the cover test:

 

 

 

 

 

 

 

 

 

 

 

8A: Ask the child to focus on an object

cover one eye
observe movement of the uncovered eye
cover other eye and repeat test

9: What is one problem with squint long term?

 

 

 

 

 

 

 

 

 

 

 

9A: Development of amblyopia

 

10: what is amblyopia?

 

 

 

 

 

 

 

 

 

 

10A: also known as lazy eye, is a vision development disorder in which an eye fails to achieve normal visual acuity, even with prescription eyeglasses or contact lense

 

11. What is the managment of squint?

 

 

 

 

 

 

 

 

 

 

 

 

11A: Eye patches may help prevent amblyopia
Referral to secondary care is appropriate