The Human Eye Questions

The human eye is an amazing organ that has evolved to give us the ability to see. It can detect light and dark, distinguish colours, make out shapes, and even see in the dark.

The human eye is a complex organ that has evolved over millions of years. There are many different parts that work together to give us the ability to see. These include photoreceptors, retina, lens, cornea, iris, ciliary body, optic nerve and so on. Various functions are performed by different parts of the eye.

Read more: Human Eye – Structure And Functioning.

Important The Human Eye Questions with Answers

1. What is the approximate diameter of the human eye?

1. 1.2 cm
2. 2.3 cm
3. 3.3 cm
4. 4.4 cm

Answer: b) 2.3 cm

Explanation: The eye is approximately 2.3 cm in diameter and is nearly spherical in shape.

2. The front transparent part of the sclera is known as ______

1. Retina
2. Cones
3. Lens
4. Cornea

Answer: d) Cornea

Explanation: The cornea is the part of the eye through which the light enters and lies in the front part of the sclera.

3. What are the types of optic nerves?

Two types of optic nerves are cones and rods.

4. The retina features ________

1. Rods
2. Cones
3. Photoreceptor cells
4. All the above options

Answer: d) All the above options

Explanation: Retina contains rods, cones, as well as photoreceptor cells.

5. What is the refractive index of the cornea?

1. 1.000
2. 1.421
3. 1.324
4. 1.376

Answer: d) 1.376

Explanation: The refractive index of the cornea is 1.376.

6. The junction of the retina and optic nerve where sensory nerve cells are not found is known as _______

1. Eye spot
2. Lens Point
3. Optic junction
4. Blind spot

Answer: d) Blind spot

Explanation: Blind spot is a region on the retina where sensory nerve cells are not seen.

7. State true or false: Vitreous humor is a water-like substance which comes out as tears.

1. TRUE
2. FALSE
   

Answer: b) FALSE

Explanation: Vitreous humor is a jelly-like substance that fills most of the inner chamber of the eye.

8. Match the following:

i) Light-sensitive inner lining a) Crystalline Lens

ii) Jelly-like substance that fills the inner chamber of the eye b) Retina

iii) Controlling the amount of light entering c) Vitreous Humor

iv) Focuses the light rays entering our eyes d) Iris

Options

1. i-b), ii-a), iii-c), iv)-d)
2. i-a), ii-b), iii-d), iv)-c)
3. i-b), ii-c), iii-d), iv)-a)
4. i-b), ii-d), iii-c), iv)-a)

Answer: i-b), ii-c), iii-d), iv)-a)

9. What are the three common defects of the eye?

Three common defects of the eye are: Hypermetropia, Myopia, and Presbyopia.

10. Choose the correct answer: Hypermetropia is also known as ______

1. Near-sightedness
2. Far-sightedness

Answer: b) Far-sightedness

Explanation: Hypermetropia is also long-sightedness or hyperopia.

Know how contact lenses or spectacles help to correct defects of vision

Practice Questions

1. Define the human eye.
2. What is myopia?
3. Name five parts of the human eye.
4. Define the retina and its functions.
5. Explain functions of the human eye.

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