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Vision is the most dominant and highly elaborated sense in humans. More than 50% of the body’s sensory receptors are located in the eyes, and a considerable part of the cerebral cortex is devoted to visual processing. The eyes detect visible light with wavelengths of 400 to 700 nm. Objects appear colored according to the wavelengths of light they reflect. Materials that reflect the full spectrum appear white, and those that absorb all wavelengths appear black. The ciliary muscle is a critical component of the eye that enables clear visualization of objects at varying distances (see Image. Schematic of Eye Anatomy).[1][2][3][4] Impaired function of the ciliary muscle contributes to accommodative disorders, such as presbyopia. In surgery, the ciliary muscle is important during cataract extraction and intraocular lens implantation, where preserving accommodative ability and preventing damage are critical. Knowledge of the anatomy and functions of this structure helps clinicians recognize abnormalities, plan procedures, and guide treatment to improve visual outcomes.