The ciliary muscle is an intrinsic eye muscle that is developed as a ring of muscle tissue in the central layer of the eye, called the uvea (vascular layer).
It regulates the flow of aqueous humor into Schlemm's canal and governs accommodation for viewing things at different distances.
The ciliary muscle is a ring of muscle that wraps around the lens and adheres to it.
This ciliary muscle can alter the shape of the eye lens by stretching it at the margins.