The posterior part of the retina, which is just opposite to the lens is

Options

A. Black spot
B. Yellow spot
C. Fovea centralis
D. Both B and C

Answer

To solve the question regarding the posterior part of the retina that is just opposite to the lens, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of the Retina**: The retina is a thin layer of tissue located at the back of the eye. It is responsible for converting light into neural signals and sending them to the brain.

2. **Identifying Key Areas of the Retina**: The retina has several important regions, including the fovea centralis, the yellow spot (macula lutea), and other areas that are involved in vision.

3. **Defining the Yellow Spot**: The yellow spot, also known as the macula lutea, is a small area on the retina that is rich in photoreceptor cells, particularly cones, which are responsible for color vision and sharp central vision.

4. **Identifying the Fovea Centralis**: The fovea centralis is located within the yellow spot and is the area of the retina that provides the sharpest vision. It is densely packed with cones and is crucial for activities requiring detailed vision, such as reading.

5. **Conclusion**: Since the question asks for the posterior part of the retina that is opposite to the lens, and considering that both the yellow spot and fovea centralis are located in this region, the correct answer is both B (yellow spot) and C (fovea centralis).

### Final Answer:
The posterior part of the retina, which is just opposite to the lens, is both the yellow spot and the fovea centralis.

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