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What is the focal length of the eye lens...

What is the focal length of the eye lens of a normal eye in relaxed position of eye muscles ?

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The focal length of the eye lens of a normal eye in relaxed position of eye muscles is about 2.4 cm.
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NAVNEET PUBLICATION - MAHARASHTRA BOARD-LENSES-Answer the following questions :
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  2. What are ciliary muscles ?

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  18. State four reasons related to problems of vision.

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