Which of the following parts of the human eye comprises of densely packed cones ?

Options

A. Fovea
B. Blind sport
C. Macula lutea
D. Retina

Answer

To solve the question "Which of the following parts of the human eye comprises of densely packed cones?" we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand the Structure of the Eye**:
- The human eye has three main layers: the sclera (outer layer), choroid (middle layer), and retina (inner layer). The retina contains photoreceptor cells.

2. **Identify the Photoreceptor Cells**:
- There are two types of photoreceptor cells in the retina: rods and cones.
- Rods are responsible for vision in low light (twilight vision), while cones are responsible for color vision and function best in bright light (daylight vision).

3. **Examine the Options**:
- **Fovea**: This is a small depression in the retina where visual acuity is highest. It contains a high density of cones and no rods, making it the region of the retina with the most concentrated cones.
- **Blind Spot**: This is the area in the retina where the optic nerve exits the eye, and it lacks photoreceptor cells (both rods and cones). Therefore, it cannot be the answer.
- **Macula**: This is the area surrounding the fovea and contains a high concentration of cones, but not as densely packed as in the fovea itself.
- **Lutea**: This term is often used interchangeably with the macula, but it does not specifically refer to a region of densely packed cones.
- **Retina**: While the retina contains both rods and cones, it is not specific enough to indicate densely packed cones.

4. **Conclusion**:
- The part of the human eye that comprises densely packed cones is the **Fovea**.

### Final Answer:
- The correct answer is **Fovea**.