What is the function of the ciliary muscles?

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The function of CILIARY MUSCLES is to change the thickness of eye - lens while focusing,,,,,,,..........
it means that ,,,,,,......the focal length of eye lens can be changed by the actions of ciliary muscle........,,,,,,,....

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Ciliary muscles Hold eye lens.. perhaps helpful for shortening and lenghthning of focal length as per needs.. .. ..

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Ciliary muscle is a circular muscle that relaxes or Tightens the zonules to enable the lens to change shape for focusing. these zonules are fibres that hold the lens suspended in position and enable it to change shape during accommodation.

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The main function of the ciliary muscles used to change the shape of the lens in the eye to help with focusing. Another function of the ciliary muscles is to help regulate the flow of aqueous humor in the eye. The ciliary muscles are made of layers of smooth muscle in a circular shape that helps to suspend the lens.

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They hold the lens in position and help in modifying the curvature of the lens

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In adjusting focal length....

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Helps in adjusting focal length

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The Function of the Ciliary Muscles

The ciliary muscles are a group of smooth muscles located within the eye, specifically in the ciliary body, which is located behind the iris. These muscles play a crucial role in the process of accommodation, which enables the eye to focus on objects at different distances. The ciliary muscles work in coordination with the lens to adjust its shape and curvature, allowing for clear vision at various distances. Here is a detailed explanation of the function of the ciliary muscles:

1. Accommodation:
Accommodation refers to the ability of the eye to adjust its focus on objects at different distances. This adjustment is achieved by the ciliary muscles. When the eye needs to focus on a nearby object, the ciliary muscles contract, causing the suspensory ligaments attached to the lens to relax. As a result, the lens becomes thicker and more curved, increasing its refractive power to focus light rays from the nearby object onto the retina.

2. Near Vision:
When focusing on objects up close, the ciliary muscles contract, allowing the lens to become more rounded. This process is known as accommodation for near vision. By adjusting the shape of the lens, the ciliary muscles help in focusing the light rays precisely onto the retina, ensuring a clear and sharp image.

3. Distant Vision:
For distant vision, the ciliary muscles relax. This relaxation causes the suspensory ligaments to pull on the lens, making it thinner and flatter. The flatter lens reduces its refractive power, allowing the eye to focus on objects that are far away. The ciliary muscles play a crucial role in the relaxation of the lens for distant vision.

4. Automatic Control:
The ciliary muscles are controlled by the parasympathetic nervous system, which operates automatically without conscious effort. This allows for rapid and seamless adjustments in the shape of the lens, ensuring clear vision at different distances. The ciliary muscles work in coordination with the muscles that control the size of the pupil, allowing for optimal vision in various lighting conditions.

5. Age-related Changes:
As a person ages, the flexibility and elasticity of the ciliary muscles decrease. This can lead to a condition called presbyopia, which is characterized by difficulty in focusing on near objects. Presbyopia is a natural part of the aging process and typically requires the use of corrective lenses, such as reading glasses or bifocals, to compensate for the reduced accommodative ability of the ciliary muscles.

In conclusion, the ciliary muscles are responsible for the accommodation of the eye, enabling clear vision at different distances. By adjusting the shape and curvature of the lens, these muscles allow the eye to focus on near and distant objects. Their automatic control ensures seamless adjustments in the lens, providing optimal visual clarity.

Answer

It's function is to adjust the flatness or curvature of eye lens.

Similar Class 10 Doubts

1.The change in focal length of a eye lens the image of objects at varying distances is done by the action of the

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1. You are given that the diameter of the eyeball is about 2.3 cm and a normal eye can adjust the focal length of its eye lens to see objects situated anywhere from 25 cm to an infinite distance away from it. (

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