The change in focal length of an eye lens is caused by the action of the?
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The change in the focal length of an eye lens is caused by the ciliary muscles.They are smooth muscle fibres.
When the ciliary muscles relax then the lens become flat and when they contract the lens become thicker
When the ciliary muscles relax then the lens become flat and when they contract the lens become thicker
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Answer:
The change in ‘focal length’ of an ‘eye lens’ is caused by the action of the suspensory ligament of the eye.
Explanation:
The ‘focal length’ of the eye has the ability to change with respect to the distance from the eye to the object which is to be viewed such that the image always falls on the retina. This is caused by the action of the suspensory ligament of the eye, near the ‘ciliary muscle’.
When the object is at infinity the ‘curvature of the lens’ decreases, hence it takes more length to reach the retina, whereas when the image is very close to the eye, the ‘curvature’ of the eye increases due to increase.
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