Q:

What does the ciliary muscle do when accommodation (focussing) in the eye occurs?

belongs to book: Examination Questions and Answers in Basic Anatomy and Physiology|Martin Caon|| Chapter number:14.4| Question number:6

waelhammad

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2022-10-19

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What does the ciliary muscle do when accommodation (focussing) in the eye occurs?

It contracts and the tension on the ciliary fi bres increases making the eye lens less convex.
It relaxes and the tension on the ciliary fi bres decreases allowing the eye lens to become more convex.
It contracts and the pull of the ciliary fi bres decreases allowing the lens to become more convex.
It relaxes and the pull of the ciliary fi bres increases to make the lens less convex.

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waelhammad

2022-10-19

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C: The ciliary muscle is doughnut-shaped with the lens in the “hole” and attached to the muscle by ciliary fi bres (zonules). When the ciliary muscle contracts it moves towards the lens which allows the ciliary fi bres to reduce their tension so that the lens is stretched less. Hence it oozes to a more rounded shape.

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