Question

What is meant by accommodation of the eye?

Hint:

For distant objects, the lens is thin (relaxed ciliary muscles); for near objects, the lens is thick (contracted ciliary muscles).

Answer 1

Step 1: Understanding the Concept:
The human eye needs to focus on objects at various distances to form a sharp image on the retina.

Step 2: Detailed Explanation:
Accommodation is the physiological process by which the vertebrate eye changes optical power to maintain a clear image or focus on an object as its distance varies.
This is achieved by the ciliary muscles changing the curvature and hence the focal length of the crystalline lens inside the eye.

Step 3: Final Answer:
It is the eye's ability to adjust its focal length to see objects at different distances clearly.