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प्रश्न
The change in the focal length of an eye lens in human beings is caused by the action of ______.
विकल्प
optic nerves
ciliary muscles
retina
cornea
उत्तर
The change in the focal length of an eye lens in human beings is caused by the action of ciliary muscles.
Explanation:
The curvature of the eye lens changes as the ciliary muscles relax or contract. The curvature of the eye lens alters the focal length of the eyes. As a result, the activity of ciliary muscles causes a change in the focal length of an eye lens.
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संबंधित प्रश्न
Write the function of the following part of the human eye: crystalline lens
With the help of ciliary muscles the human eye can change its curvature and thus alter the focal length of its lens. State the changes that occur in the curvature and focal length of the eye lens while viewing (a) a distance object, (b) nearby objects.
Give the scientific names of the following parts of the eye:
changes shape to focus a picture on the retina.
What happens to the size of pupil of our eye (i) in dim light (ii) in bright light?
Draw a simple diagram of the human eye and label clearly the cornea, iris, pupil, ciliary muscles, eye-lens, retina, optic nerve and blind spot.
Name the following:
White part of the eye.
Define the following:
Blind spot
Sketch and label V.S. of a human eye.
The transparent membrane that keeps the eye moist is ______.
Name the following:
Place of no vision in the retina of the eye.
