Area of retina in human eye containing only cone cells is called

Options

A. Optic disc
B. tapetum lucidum
C. macula lutea
D. fovea centralis

Answer

To solve the question regarding the area of the retina in the human eye that contains only cone cells, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Eye**:
- The human eye consists of three main layers: the outer layer (sclera), the middle layer (choroid), and the innermost layer (retina).

2. **Identify the Components of the Retina**:
- The retina contains three types of cells:
- Ganglion cells
- Bipolar cells
- Photoreceptors (which include rods and cones)

3. **Differentiate Between Rods and Cones**:
- Rods are responsible for night vision and are more sensitive to light, while cones are responsible for color vision and function best in bright light.

4. **Locate the Fovea Centralis**:
- The fovea centralis is a small depression in the retina where cone cells are densely packed. This area is crucial for sharp central vision.

5. **Confirm the Area with Only Cone Cells**:
- The fovea centralis is the specific area in the retina that contains only cone cells, making it the correct answer to the question.

6. **Evaluate Other Options**:
- The other options provided (optic disc, tapetum lucidum, macula lutea) do not refer to areas that contain only cone cells.
- The optic disc is where the optic nerve exits the eye and has no photoreceptors.
- The tapetum lucidum is a reflective layer found in some animals but not in humans.
- The macula lutea is an area that includes the fovea but also contains other types of cells.

### Conclusion:
- The area of the retina in the human eye that contains only cone cells is called the **fovea centralis**.