Question

Where does the image of an object is formed in a human eye?
${\text{A}}{\text{.}}$ Cornea
${\text{B}}{\text{.}}$ Retina
${\text{C}}{\text{.}}$ Pupil
${\text{D}}{\text{.}}$ Iris

Answer 1

- Hint- Here, we will proceed by discussing little about the eye and then, we will write about each of the parts of the eye mentioned in the options given in the problem along with their functions.

Complete step-by-step solution -

The eye is made up of a number of parts, including the iris, pupil, cornea, and retina. The eye has six muscles which control the eye movement, all providing different tension and torque. The eye works a lot like a camera, the pupil provides the focus-stop, the iris the aperture-stop, the cornea resembles a lens.
The way that the image is formed is much like the way a convex lens forms an image.
Cornea- The cornea is the transparent part of the eye that covers the front portion of the eye. It covers the pupil, iris, and anterior chamber (the fluid-filled inside of the eye). The cornea’s main function is to refract, or bend, light. The cornea is responsible for focusing most of the light that enters the eye.
Retina- The retina is a thin layer of tissue that covers the inside wall at the back of the eye and acts like the film of a camera to capture light signals that are then transmitted via the optic nerve to the brain to create vision. When healthy, the centre of the retina, or the macula, allows us to see detail clearly.
Pupil- The pupil is the opening in the centre of the iris. The function of the pupil is to allow light to enter the eye so it can be focused on the retina to begin the process of sight. Typically, the pupils appear perfectly round, equal in size and black in colour. The black colour is because light that passes through the pupil is absorbed by the retina and is not reflected back (in normal lighting).
Iris- The iris is a flat and ring-shaped membrane behind the cornea of the eye with an adjustable circular opening in the centre called a pupil. This is the structure that provides an individual with eye colour.
Therefore, the image of an object in a human eye is formed at the retina of the eye.
Hence, option B is correct.

Note- The image of the object formed on the retina with light rays converging most at the cornea and upon entering and exiting the lens. Rays from the top and bottom of the object are traced and produce an inverted real image on the retina. The distance to the object is drawn smaller than scale.