Question

What is cataract? Explain with diagram. How is it treated? Mention two causes. [3 marks]

Answer 1

• Sometimes, particularly in old age, eyesight becomes foggy. It is due to the eye lens becoming cloudy. When this happens, a person is said to have cataract. [1 mark]
• It is possible to treat this defect by surgery. The opaque lens is removed and a new artificial lens is inserted. Modern technology has made this procedure much simpler and safer. [1 mark]
• It develops at old age and in diabetes person. [1 mark]