Question

The change in focal length of an eye lens is caused by the action of the / ਨੇਤਰ ਲੈੱਨਜ਼ ਦੀ ਫੋਕਸ ਦੂਰੀ ਵਿੱਚ ਪਰਿਵਰਤਨ ਕੀਤਾ ਜਾਂਦਾ ਹੈ: / अभिनेत्र लेंस की फोकस दूरी में परिवर्तन किया जाता है- *

(1) Pupil / ਪੁਤਲੀ ਦੁਆਰਾ / पुतली द्वारा

(2) Retina / ਰੈਟਿਨਾ ਦੁਆਰਾ / दृष्टिपटल द्वारा

(3) Ciliary Muscles / ਸਿਲੀਅਰੀ ਪੇਸ਼ੀ ਦੁਆਰਾ / पक्ष्माभी द्वारा

(4) Iris / ਆਇਰਿਸ / परितारिका द्वारा f​

Answer 1

Answer:

(3) Ciliary Muscles

Explanation:

The ciliary muscles in an eye change the focal length of an eye lens to concentrate distant or near objects easily, this capability of an eye is known as the power of an eye.

The ciliary body produces the fluid in the eye called waterless humour. It also contains the ciliary muscle, which changes the shape of the lens when your eyes concentrate on a near object. This process is called accommodation.

It's composed of smooth muscle filaments acquainted in three different directions; longitudinal, radial and indirect.

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Answer 2

Option (3) is the correct answer

(3) is Ciliary Muscles

Explanation:

• The ciliary muscles exist in an eye which changes the focal length of an eye lens
• It helps to focus on distant or nearby objects very clearly.

• It is the ability of an eye which is known as the power of an eye.

• It is a circular muscle which is better known as the ciliary muscle which helps to relax or tighten the zonules which enable the lens to change shape for focusing.

• The zonules are defined as the fibers that hold the lens which is suspended in position and it enables to change the shape during accommodation.

• This muscle increases or decreases the focal length of the eye lens.

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