Question

Write the structure of the eye lens and state the role of the ciliary muscle in the human eye.

Answer 1

Eye lens is the part of the Human Eye Structure which helps us in focusing objects. It is only due to the accommodating (shape-changing) abilities of the eye lens that we are able to focus objects in close as well as far distances with high clarity.
The ciliary muscles are responsible for altering the shape of the eye lens as we move our focus back and forth.

Complete step by step solution:
The human eye contains a transparent, jelly-like structure known as a lens. Lens has ciliary muscles attached to all its sides.
The ciliary muscles are made up of layers of smooth muscles. They suspend the eye lens inside the eye socket. They are responsible for changing the shape of the eye lens in order to focus objects on the retina. The lens takes a thin, flat kind of shape when we view objects at a distance in order to increase its focal length (Ciliary muscles are relaxed in this case). The eye lens takes a curved, round like shape while viewing objects closely in order to reduce its focal length (Ciliary muscles are contracted in this case). Moreover, they also help to regulate the flow of aqueous humor in the eye.

Note: This is a theoretical question categorized under the Easy segment which has been asked multiple times in the Boards. One just needs to be through with the Optics chapter (you must read the chapter at least thrice) in order to solve such questions.