Certified Ophthalmic Assistant Practice Exam 2026 – Comprehensive Preparation Guide

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Which muscle is responsible for changing the shape of the lens to focus on near objects?

Ciliary muscle

The ciliary muscle is responsible for changing the shape of the lens to focus on near objects. When the ciliary muscle contracts, it causes the lens to become more rounded, which is necessary for focusing on close objects through a process called accommodation. The other muscles listed are not directly involved in the process of changing the shape of the lens for near vision.

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Iris muscle

Rectus muscle

Scleral muscle