👁️ Human Eye Quiz – Edu Bright Pages

Explore the science of vision! Test your knowledge of how the human eye works and discover fun facts about sight and light — only on Edu Bright Pages.

1. What is the transparent front part of the eye that refracts light?

Correct answer: b) Cornea. The cornea refracts light to help focus it on the retina.

2. Which part of the eye controls the amount of light entering through the pupil?

Correct answer: c) Iris. The iris adjusts the size of the pupil to regulate light entry.

3. The pupil is:

Correct answer: c) The opening in the center of the iris that allows light to enter the eye.

4. Which part of the eye is responsible for focusing light onto the retina?

Correct answer: b) Lens. The lens changes shape to focus light on the retina for clear vision at different distances.

5. The retina contains cells called:

Correct answer: a) Rods and cones. The retina has photoreceptors including rods and cones.

6. The optic nerve carries visual information from the retina to the:

Correct answer: a) Brain. The optic nerve sends signals to the brain for image processing.

7. The white part of the eye is called the:

Correct answer: c) Sclera. It is the tough, white protective outer layer.

8. The fluid-filled space between the cornea and the lens is called:

Correct answer: b) Aqueous humor. The watery fluid nourishes the eye and maintains shape.

9. The jelly-like substance filling the large space behind the lens is the:

Correct answer: b) Vitreous humor. This gel preserves the eye's round shape.

10. Which structure adjusts the lens shape for focusing on near or distant objects?

Correct answer: b) Ciliary muscles. They change the lens shape for focus.

11. What layer covers the sclera and lines the inside of the eyelids?

Correct answer: c) Conjunctiva. It lubricates and protects the eye surface.

12. The part of the retina responsible for sharp central vision is called:

Correct answer: b) Macula. It contains cones for detailed central vision.

13. Which cells in the retina function in low light and black-and-white vision?

Correct answer: b) Rods. They detect dim light for night vision.

14. The refractive power of the eye mainly comes from the:

Correct answer: b) Cornea. It provides most of the refractive power.

15. The color of the human eye is determined by the:

Correct answer: b) Iris. Eye color depends on iris pigmentation.