Question

Which one of the following forms the pigmented layer in eye?

• A. Choroid
• B. Retina
• C. Sclera
• D. Fovea

Answer 1

The correct option is A

Choroid

The correct option is A:

Explanation of the correct option:

1. The human eyeball is covered with three layers or coats which are-(i) Fibrous coat (ii) pigmented coat and (iii) Neural coat.
2. The choroid layer is the part of the pigmented layer or pigmented coat of the eyeball.

Explanation of the incorrect options:

Option B:

1. It is the innermost layer of the human eye.
2. This layer is made up of nervous tissue and connective tissue.
3. It is also known as the neural coat of the eyes.
4. Two types of photosensitive cells can be found in the retina- rod cells and cone cells.

Option C:

1. The sclera is the outer covering layer of the eyeball.
2. It is present in the posterior portion, comprising about five-sixth parts of the external layer.
3. It is a comparatively tough, translucent, and thick layer that is composed of white collagenous connective tissue.

Option-D :

1. A depressed region is present at the centre of the retina.
2. It is yellowish and so, known as a yellow spot.
3. The clearest and brightest image is formed in this region.
4. This region is also known as fovea or fovea centralis.

Final answer: The choroid forms the pigmented layer in the eye.