Is ciliary body is a smooth muscle structure ot which the lens attached?

No, the ciliary body is not a smooth muscle structure to which the lens is attached. The ciliary body is a ring-shaped structure that lies behind the iris and in front of the choroid in the eye. It consists of smooth muscle fibers and is responsible for controlling the shape of the lens during accommodation. The suspensory ligaments of the lens attach to the ciliary body. The contraction and relaxation of these muscles changes the tension on the lens, which in turn changes its shape and allows the eye to focus on objects at different distances.