Question

What is the function of the sclera?

a. It nourishes the cornea.

b. It is jelly like substance responsible for the shape of the eye by providing pressure.

c. It is the tough outer layer allowing the eye to maintain its shape.

d. It contains the blood vessels and melanin.

e. It is the light sensing part, containing the photoreceptors.

Answer 1

Ans:

Sclera is the white portion of the eye that is opaque,tough and fibrous.It is continous with the cornea's stroma layer.It is less active metabolically and hence has less blood supply and itself lacks blood vessels.Following are the functions of sclera:

1. Sclera and intraocular pressure together, helps in maintaining the shape of the eyeballs.
2. Its tough and fibrous nature protects the eye from damages due to external forces.
3. It's sturdy attachment with extraocular muscles provides flexibility to the eyeballs.

From all the above facts about Sclera we can conclude that all the answer options except (C) are incorrect.

Hence, the answer is (C)It is the tough outer layer allowing the eye to maintain its shape.