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Question (1)

QN0036322

The ability of the human eye to adjust its focal length for viewing objects at different distances is called:

(A) Refraction
(B) Accommodation
(C) Dispersion
(D) Scattering

Correct Answer: B

Explanation:

Accommodation is the ability of the eye lens to adjust its focal length.

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Question (2)

QN0036323

The image formed by the eye lens on the retina is:

(A) Virtual and erect
(B) Virtual and inverted
(C) Real and inverted
(D) Real and erect

Correct Answer: C

Explanation:

The eye lens forms a real and inverted image on the retina.

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Question (3)

QN0036324

The part of the eye that controls the amount of light entering the eye is:

(A) Retina
(B) Iris
(C) Optic nerve
(D) Ciliary muscles

Correct Answer: B

Explanation:

The iris controls the size of the pupil and regulates the amount of light entering the eye.

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Question (4)

QN0036325

For a young adult with normal vision, the least distance of distinct vision is approximately:

(A) 2.5 cm
(B) 25 cm
(C) 2.5 m
(D) 25 m

Correct Answer: B

Explanation:

The near point of a normal young adult is about 25 cm.

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Question (5)

QN0036326

The far point of a normal human eye is:

(A) 25 cm
(B) 1 m
(C) 10 m
(D) Infinity

Correct Answer: D

Explanation:

A normal eye can see distant objects clearly up to infinity.

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Question (6)

QN0036327

Which muscles change the focal length of the eye lens?

(A) Iris muscles
(B) Retinal muscles
(C) Ciliary muscles
(D) Optic muscles

Correct Answer: C

Explanation:

Ciliary muscles change the curvature and focal length of the eye lens.

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Question (7)

QN0036328

Which defect of vision is commonly known as near-sightedness?

(A) Hypermetropia
(B) Presbyopia
(C) Myopia
(D) Cataract

Correct Answer: C

Explanation:

Myopia is also called near-sightedness.

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Question (8)

QN0036329

Myopia is corrected using a:

(A) Convex lens
(B) Concave lens
(C) Cylindrical lens only
(D) Plane glass plate

Correct Answer: B

Explanation:

Myopia is corrected using a suitable concave lens.

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Question (9)

QN0036330

Hypermetropia is also called:

(A) Near-sightedness
(B) Short-sightedness
(C) Far-sightedness
(D) Colour blindness

Correct Answer: C

Explanation:

Hypermetropia is also known as far-sightedness.

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Question (10)

QN0036331

Hypermetropia is corrected using a suitable:

(A) Concave lens
(B) Convex lens
(C) Plane mirror
(D) Prism only

Correct Answer: B

Explanation:

Hypermetropia is corrected using a suitable convex lens.

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Question (1)

The ability of the human eye to adjust its focal length for viewing objects at different distances is called:

Explanation:

Link:

Question (2)

The image formed by the eye lens on the retina is:

Explanation:

Link:

Question (3)

The part of the eye that controls the amount of light entering the eye is:

Explanation:

Link:

Question (4)

For a young adult with normal vision, the least distance of distinct vision is approximately:

Explanation:

Link:

Question (5)

The far point of a normal human eye is:

Explanation:

Link:

Question (6)

Which muscles change the focal length of the eye lens?

Explanation:

Link:

Question (7)

Which defect of vision is commonly known as near-sightedness?

Explanation:

Link:

Question (8)

Myopia is corrected using a:

Explanation:

Link:

Question (9)

Hypermetropia is also called:

Explanation:

Link:

Question (10)

Hypermetropia is corrected using a suitable:

Explanation:

Link:

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