Class 10 - Science

Human Eye and Colourful World Online MCQ Test

Olympiad Level MCQs Also Included

Set-1 Set-2 Set-3 Set-4 Set-5 Set-6 Set-7 Set-8 Set-9

1. What is the ability of the eye to adjust its focus from distant to near objects called?

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

2. Which part of the eye is responsible for the power of accommodation?

(A) Cornea
(B) Retina
(C) Ciliary muscles
(D) Pupil

3. When the ciliary muscles are relaxed, the eye focuses on:

(A) Distant objects
(B) Near objects
(C) Both distant and near objects
(D) None of the above

4. What happens to the curvature of the lens when focusing on a near object?

(A) The lens becomes thinner
(B) The lens becomes thicker
(C) The lens remains the same
(D) The lens becomes rigid

5. What is the unit of measurement for the power of accommodation of the eye?

(A) Diopters
(B) Meters
(C) Millimeters
(D) Kilometers

6. What is the term for the closest point to the eye at which an object can be brought into focus?

(A) Far point
(B) Near point
(C) Focus point
(D) Optical point

7. The power of accommodation of the eye is highest in:

(A) Children
(B) Young adults
(C) Older adults
(D) Elderly individuals

8. Which of the following conditions occurs when the eye loses its ability to accommodate for near vision as a person ages?

(A) Myopia
(B) Hyperopia
(C) Presbyopia
(D) Astigmatism

9. Which type of lens is commonly used to correct presbyopia?

(A) Convex lens
(B) Concave lens
(C) Bifocal lens
(D) Cylindrical lens

10. In the human eye, the power of accommodation helps in focusing on objects at:

(A) A fixed distance only
(B) Distant objects only
(C) Both near and distant objects
(D) Objects in motion