Question

The colored portion of an eye which is visible is known as
a. Cornea
b. Pupil
c. Lens
d. Iris

Answer 1

Hint: The human eye is a sense organ that responds to light and allows us to see. It has a number of components such as the cornea, iris, pupil, lens, retina, macula, optic nerve, and many more. The rod and cone cells are also present in the human eye. They provide pigment that allows vision.

Complete answer:
The iris is a colored part of the eye. The function of an iris is to control the amount of light that enters the eye by adjusting the size of the pupil. The pupil is described as a hole-shaped opening present in the middle of the eye.
The cornea is described as a transparent window of the eye that is present within the opaque sclera. The function of the cornea is to refract the light rays.
Moreover, the lens capsule is a clear membrane-like structure that serves to refract and focus light rays on the retina.
The pigmentation of the iris varies from light brown to black in humans. It depends on the concentration of the melanin pigment in the eye, in the epithelium and the cellular density of stroma.

Hence, the correct answer is option (D).

Note: The space present between the cornea and the lens is called the aqueous chamber. It contains a thin watery fluid which is known as an aqueous chamber. On the contrary, the space between the lens and the retina is known as the vitreous chamber. This chamber is filled with a transparent get which is known as a vitreous chamber.