Question

Cornea is a transparent spherical structure which
(A) Reflects light
(B) Scatters light
(C) Refracts light
(D) None of these

Answer 1

Hint: Since the Cornea is one of the major layers of the eye, its function is to ensure that the major portion of light rays enter into the eye and hit the retina in order to see the things around the person. So, in simple words the cornea makes light to bend and hit the retina wall for image formation.

Complete answer:
• The cornea of our eye is made up from a transparent material which acts as a medium for light rays to pass through it.
• The main function of the cornea is to refract the light rays so that the rays converge to form an image on the walls of the retina.
• Thus, after the image is formed on the retina wall the optic nerve sends signals to the brain and the brain processes the image (by inverting and magnifying the image formed at the retina wall).
• The cornea, iris and the lens of the eye work together in order to refract the light.

• Here in the above diagram, it shows how the cornea refracts or in simple terms converges the light rays to the retina wall so that the image is formed properly.
Therefore, option (C) is correct.

Note:
• Cornea is made from a transparent material, it doesn’t contain any particulate matter in itself.
• It doesn’t reflect or scatter light respectively, but sometimes the cornea of our eye becomes defective, it becomes translucent or could not refract the light properly in such cases the images formed on the retina wall becomes blurred leading to vision defect in a person.
• If the cornea becomes completely opaque the person becomes blind as the light is being stopped from reaching the retina.