How does accommodation in the eye occur? When our ciliary muscle

C: The ciliary muscle is doughnut-shaped with the lens in the “hole” and attached to the muscle by ciliary fi bres (zonules). When the ciliary muscle relaxes it moves away from the lens (the diameter of the hole increases) which causes the ciliary fi bres to pull on the lens. This tension in the fi bres stretches and fl attens the lens into a less convex shape.