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CBSE Class 10 Answered

eplain the accommodation of an eye with image or figure
Asked by azamk4198 | 30 Dec, 2015, 08:55: PM
answered-by-expert Expert Answer
The curvature of the eye lens can be adjusted by the ciliary muscles. This changes the focal length of the lens. The ability of the eye lens to adjust the focal length (converging power) is called accommodation.
To see distant objects, the muscles relax and the lens becomes thin. This increases the focal length, thereby enabling us to see distant objects.
To see nearby objects, the muscles contract and the lens becomes thick. This decreases the focal length, thereby enabling us to see nearby objects.
 
 

The focal length cannot decrease below a minimum limit. The minimum distance at which objects can be seen most distinctly without strain is called the least distance of distinct vision. It is also called the near point of the eye.

Answered by Yashvanti Jain | 31 Dec, 2015, 11:57: AM

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