Final answer:
The ciliary body and the lens are part of the eye's structure, with the ciliary body adjusting the lens shape for focusing light on the retina and the lens ensuring clear vision by accommodating for different distances.
Step-by-step explanation:
Structures of the Eye
Both the ciliary body and the lens are essential structures of the eye. The ciliary body is a muscular structure that is attached to the lens by zonule fibers and is responsible for changing the shape of the lens to focus light onto the retina. The lens itself is a flexible structure that can adjust its curvature to focus light from objects at varying distances onto the retina, ensuring clear vision. If the lens is damaged or unable to change shape, it can lead to issues with focusing images on the retina, which could result in blurred vision or other visual impairments.