During accommodation, what happens to the zonular fibers when the ciliary muscle contracts?

Explore the Special Senses Eyes and Ears Test. Understand crucial concepts with detailed questions and answers. Enhance your knowledge of the sensory system and prepare confidently for the exam!

Multiple Choice

During accommodation, what happens to the zonular fibers when the ciliary muscle contracts?

Explanation:
When the eye accommodates for near vision, the ciliary muscle contracts, moving the ciliary body inward. This reduces the pull of the zonular fibers on the lens, letting them relax. With the suspensory ligaments slackened, the lens springs to a more curved, thicker shape, increasing its refractive power to focus on nearby objects. (For distant vision, the ciliary muscle relaxes and the zonular fibers become taut, flattening the lens.)

When the eye accommodates for near vision, the ciliary muscle contracts, moving the ciliary body inward. This reduces the pull of the zonular fibers on the lens, letting them relax. With the suspensory ligaments slackened, the lens springs to a more curved, thicker shape, increasing its refractive power to focus on nearby objects. (For distant vision, the ciliary muscle relaxes and the zonular fibers become taut, flattening the lens.)

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy