Question

What is meant by power of accommodation of the eye?

Answer 1

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● Accomodation is a process by which 5he vertebrate eye changes optical power to maintain a clear image or focus on an object as its distance varies......

● Mammals , birds and reptiles vary the optical power by changing the form of the elastic lens using the ciliary body....

● In human power is up to 15 diopters...

○ P = 1/ f .... f in m only ....
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Answer 2

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• When the ciliary muscles are relaxed, the eye lens becomes thin, the focal length increases, and the distant objects are clearly visible to the eyes.

• To see the nearby objects clearly, the ciliary muscles contract making the eye lens thicker.

• Thus, the focal length of the eye lens decreases and the nearby objects become visible to the eyes.

• Hence, the human eye lens is able to adjust its focal length to view both distant and nearby objects on the retina.

• This ability is called the power of accommodation of the eyes.

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