CO Diagnosis & Management of Strabismus and Amblyopia 3

Question 1

A patient with a right superior oblique palsy will most likely adopt which compensatory head posture?

Accepted Answer

Head tilt to the left, chin down

Answer

In right SO palsy, patients tilt their head to the left shoulder to reduce the hyperdeviation caused by the palsied muscle.

Question 2

The Parks three-step test is designed to isolate which type of muscle palsy?

Accepted Answer

Cyclovertical muscle palsies

Answer

The Parks three-step test uses three sequential observations to identify which of the eight cyclovertical muscles is paretic.

Question 3

Which of the following is the MOST appropriate initial management for a 6-month-old with infantile esotropia measuring 45 prism diopters?

Accepted Answer

Full optical correction of any hyperopia and observation for 6 weeks

Answer

Before surgery, any significant refractive error must be corrected first to rule out an accommodative component, then early surgery is planned.

Question 4

The Bagolini striated lens test is used to assess:

Accepted Answer

Binocular function and suppression under natural viewing conditions

Answer

Bagolini lenses have minimal optical interference and allow testing of binocular status under conditions close to everyday vision.

Question 5

A child consistently fails visual acuity screening in one eye despite having no refractive error or structural pathology. The next best step is:

Accepted Answer

Repeat cycloplegic refraction and cover test evaluation

Answer

Cycloplegic refraction may reveal latent hyperopia or anisometropia not apparent on manifest testing, and a cover test identifies strabismus.

(CO) Certified Orthoptist Practice Test