multiple-choice questions (MCQs) about human eyes
1. **Question:** The colored part of the eye that regulates the amount of light entering is called the:
- A) Retina
- B) Cornea
- C) Iris
- D) Lens
**Answer:** C) Iris
2. **Question:** Which structure is responsible for focusing light onto the retina?
- A) Cornea
- B) Lens
- C) Sclera
- D) Choroid
**Answer:** B) Lens
3. **Question:** The transparent, front part of the eye that covers the iris and pupil is called the:
- A) Retina
- B) Cornea
- C) Sclera
- D) Choroid
**Answer:** B) Cornea
4. **Question:** The medical term for nearsightedness is:
- A) Hyperopia
- B) Astigmatism
- C) Myopia
- D) Presbyopia
**Answer:** C) Myopia
5. **Question:** What is the function of the retina in the eye?
- A) Color vision
- B) Focusing light
- C) Detecting light and forming images
- D) Producing tears
**Answer:** C) Detecting light and forming images
6. **Question:** The part of the eye that contains the highest concentration of photoreceptor cells
(rods and cones) is the:
- A) Sclera
- B) Cornea
- C) Retina
- D) Choroid
**Answer:** C) Retina
7. **Question:** Which cells in the retina are responsible for color vision?
- A) Rod cells
- B) Cone cells
- C) Bipolar cells
- D) Ganglion cells
**Answer:** B) Cone cells
8. **Question:** The area of the retina with the highest concentration of cones, responsible for detailed
central vision, is called the:
- A) Fovea
- B) Optic disc
- C) Macula
- D) Blind spot
**Answer:** A) Fovea
9. **Question:** The clear, gel-like substance that fills the space between the lens and the retina is
called the:
- A) Aqueous humor
- B) Vitreous humor
- C) Scleral humor
- D) Corneal humor
**Answer:** B) Vitreous humor
10. **Question:** What is the function of the optic nerve?
- A) Regulates pupil size
- B) Transmits visual information to the brain
- C) Adjusts the shape of the lens
- D) Produces tears
**Answer:** B) Transmits visual information to the brain