Understanding Strabismus and Vergence

What is the primary difference between intermittent and constant strabismus?

• Intermittent strabismus is more severe than constant strabismus.

• The primary difference is that intermittent strabismus is not always present, whereas constant strabismus is always present.

• Constant strabismus occurs only during sleep.

• Intermittent strabismus affects only one eye at a time.

Which test is used to assess the presence of strabismus?

• Visual acuity test

• Retinoscopy

• Tonometry

• Cover test

What does a high AC/A ratio indicate in convergence excess?

• It indicates a tendency for excessive convergence relative to accommodation.

• It suggests a strong reliance on accommodation.

• It shows a balanced relationship between convergence and accommodation.

• It indicates a lack of convergence ability.

What is the purpose of the Worth Four Dot Test?

• To determine visual acuity.

• To measure eye pressure.

• To assess color blindness.

• To evaluate visual perception and cognitive processing.

What is the abnormal value for near point of convergence (NPC)?

• Between 3 cm and 5 cm

• Greater than 6 cm

• Exactly 6 cm

• Less than 2 cm

Which vergence dysfunction is characterized by difficulty in diverging?

• Divergence Insufficiency

• Accommodative Insufficiency

• Divergence Excess

• Convergence Insufficiency

In the cover test, what clue indicates constant strabismus?

• Eye movement towards the cover upon removal.

• The covered eye shows a change in position.

• Rapid blinking of the covered eye after uncovering.

• No movement of the covered eye upon removal of the cover.

True or False: Vergence dysfunctions can be measured using prism bars.

• False, vergence dysfunctions cannot be measured with any tools.

• True

• True, but only with specialized equipment.

• False, prism bars are only used for measuring depth perception.

True or False: A low AC/A ratio is typically associated with convergence insufficiency.

• True

• True or False: A high AC/A ratio is typically associated with convergence insufficiency.

• True or False: A low AC/A ratio has no relation to convergence issues.

• True or False: A low AC/A ratio is typically associated with convergence excess.

Identify the image that represents the Worth Four Dot Test.

• An image of three dots in a triangular formation.

• An image of five dots arranged in a circle.

• An image of four dots arranged in a square pattern.

• An image of four dots in a straight line.