Question

The black pigment in the eye, which reduces the internal reflection is located in
A. Retina
B. Iris
C. Choroid
D. Cornea

Answer 1

Hint: Our eyeball is divided into the fibrous, inner and vascular layers. These layers have different functions and structures. The fibrous layer is the outermost layer. It consists of the cornea and sclera and they provide shape to the eye and support deeper structures. The vascular layer of the eye lies beneath the fibrous layer. It consists of the choroid, iris and ciliary body and the inner layer is formed by the retina.

Complete answer:
The black pigment in the eye that reduces internal reflection is the choroid. The dark-colored melanin pigment in the choroid limits reflections within the eye which could degrade vision, by absorbing light. It is rich in blood vessels that bring nutrients and oxygen to nourish the eyeball. Choroid supplies nutrients to the eye as it is highly vascular. The choroid coat forms iris in the front of the eye. It is pigmented and also responsible for our eye color.
The choroid is modified to form the iris and the ciliary body in front of the eye. The external coat of the eyeball is called sclerotic, but there is a transparent connective tissue present in front of the sclerotic, which is known as cornea. In front of the choroid, a pigmented part called iris is present. Retina is a light-sensitive tissue lining back of the eye. It is the thin innermost coat of the eyeball and it is a light sensitive nervous layer. Retina receives light that the lens has focused, convert and convert into neural signals, and also send these neural signals to the brain for visual recognition.

Hence, the correct answer is option (C).

Note: Retina has a vital role in vision; its damage can cause permanent blindness. Retina can be abnormally detached from its usual position; and it may prevent the retina from processing or receiving light. This restricts our brain from receiving this information, which leads to blindness.