Wiktionary
ciliary muscle
n. a muscle controlling the eye's accommodation for viewing objects at varying distances
Wikipedia
Ciliary muscle
The ciliary muscle is a ring of smooth muscle in the eye's middle layer ( vascular layer) that controls accommodation for viewing objects at varying distances and regulates the flow of aqueous humour into Schlemm's canal. It changes the shape of the lens within the eye, not the size of the pupil which is carried out by the sphincter pupillae muscle and dilator pupillae.
Usage examples of "ciliary muscle".
That portion of the choroid layer is the ciliary body, and this contains the ciliary muscle.