Human Eye MCQs Class 8
Human Eye MCQs – CBSE Class 8 Science
Class: 8
Subject: Science
Section: Light
Topic: Human Eye MCQs
Board: CBSE (Based on NCERT Syllabus)
Subject: Science
Section: Light
Topic: Human Eye MCQs
Board: CBSE (Based on NCERT Syllabus)
1. The human eye works like a:
Answer: b) Camera
Explanation: The eye has a lens system that focuses light on the retina like a camera focuses on film.
Explanation: The eye has a lens system that focuses light on the retina like a camera focuses on film.
2. The coloured part of the eye is:
Answer: b) Iris
Explanation: Iris controls the size of the pupil and hence the amount of light entering the eye.
Explanation: Iris controls the size of the pupil and hence the amount of light entering the eye.
3. The opening in the iris is called:
Answer: c) Pupil
Explanation: Light enters the eye through the pupil.
Explanation: Light enters the eye through the pupil.
4. Image is formed on the:
Answer: b) Retina
Explanation: Retina contains light‑sensitive cells forming the image.
Explanation: Retina contains light‑sensitive cells forming the image.
5. The lens of the eye is:
Answer: b) Convex
Explanation: It converges light rays to form images.
Explanation: It converges light rays to form images.
6. The transparent front part of eye is:
Answer: b) Cornea
Explanation: It protects the eye and refracts light.
Explanation: It protects the eye and refracts light.
7. Blind spot is where:
Answer: a) No rods & cones
Explanation: Hence no vision occurs there.
Explanation: Hence no vision occurs there.
8. Optic nerve carries:
Answer: c) Image signals
Explanation: It sends visual information to brain.
Explanation: It sends visual information to brain.
9. Ability to change focal length is:
Answer: b) Accommodation
Explanation: Eye lens adjusts to see near & far objects.
Explanation: Eye lens adjusts to see near & far objects.
10. Rod cells help in:
Answer: b) Night vision
Explanation: Rods work in dim light.
Explanation: Rods work in dim light.
11. Cone cells detect:
Answer: b) Colours
Enable colour vision.
Enable colour vision.
12. Near point of normal eye:
Answer: b) 25 cm
Least distance of clear vision.
Least distance of clear vision.
13. Persistence of vision lasts:
Answer: b) 1/16 sec
Helps movies appear continuous.
Helps movies appear continuous.
14. Myopia corrected by:
Answer: b) Concave lens
Helps see distant objects.
Helps see distant objects.
15. Hypermetropia corrected by:
Answer: b) Convex
Helps near vision.
Helps near vision.
16. Eyelids protect from:
Answer: d) All
Provide protection.
Provide protection.
17. Tear glands keep eye:
Answer: b) Moist
Prevents infection.
Prevents infection.
18. Retina acts like:
Answer: a) Film screen
Image forms here.
Image forms here.
19. Optic nerve connects eye to:
Answer: b) Brain
Processes vision.
Processes vision.
20. Vision is possible due to:
Answer: a) Reflection of light
Light enters and forms image enabling vision.
Light enters and forms image enabling vision.
