Certified Paraoptometric (CPO) Practice Exam 2025

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How many muscles does each eye have to assist in ocular movement?

  1. Four

  2. Five

  3. Six

  4. Seven

The correct answer is: Six

Each eye is assisted in its movement by six extraocular muscles. These muscles work together to allow the eye to move in various directions, providing important functions for tracking objects and maintaining visual alignment. The six muscles include the superior rectus, inferior rectus, medial rectus, lateral rectus, superior oblique, and inferior oblique. Each muscle is responsible for specific movements, such as elevation, depression, adduction, abduction, and rotation, enabling a wide range of motion that is essential for effective vision. Given this context, the choice of six is accurate as it reflects the anatomical structure necessary for coordinated eye movement.

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