Concept:Accommodation is the eye's ability to adjust its lens to focus clearly on objects at different distances.
Explanation:When you look at a distant object, the ciliary muscles relax, making the lens thinner and increasing its focal length.
When you look at a nearby object, the ciliary muscles contract, making the lens thicker and decreasing its focal length.
This automatic adjustment of the lens shape is called accommodation.
It allows both near and distant objects to be focused sharply on the retina.
The other options are incorrect: image formation refers to producing a picture, refraction is the bending of light, and hypermetropia is a vision defect.
Answer:D. accommodation