Question

Which part of the donor eye is used for grafting in order to cure certain cases of blindness in Humans?
A. Retina
B. Lens
C. Cornea
D. The entire eyeball

Answer 1

Hint: Blindness is the inability to see anything, including light and rays.
Partial blindness means shorter vision. For example, blurry vision or the inability to distinguish the shapes of objects. Blindness is cured by grafting.

Complete step by step answer:
-Cornea is the eye’s clear and protective outer layer. Along with the sclera it serves as a barrier against dirt particles and microbial germs that can cause eye damage.
-A cornea transplant is often referred to as corneal graft. It can be used to improve vision, cure blindness, relieve pain and to treat severe infection in the eyes.
-To treat blindness, the donor's eye is used for grafting on the part that is cornea (part of human eye)
-Corneal transplantation is a surgical procedure where a damaged or unhealthy cornea is replaced by donated corneal tissue .
-The cornea is the transparent front part of the eye that covers the iris, pupil and anterior chamber of human eye’s.
- Cornea, the main focusing part in the eye. It is the very clear front surface of the eye. Like a small hole, it allows light to enter the eye.
-Vision could be markedly reduced or lost if the cornea becomes cloudy , scarred or damaged. This condition is known as corneal blindness.
-Eye donation is an act of donating eyes after death. Only corneal blinds can be benefited through this process, not other blindness disorders.

Hence the correct option is C.

Note:
1. Retina is a thin layered tissue which is located near the optic nerve. It’s main function is to receive light and convert it to neural signals.
2. The eyeball is a spherical organ, which houses the structures responsible for vision. It was found in a bony cavity within the facial skeleton known as the bony orbit.