1A colour vision test circle is filled with coloured dots, and some of the dots form a number. Can you see the number inside it? What would it mean if you could not?
2What is a cataract? How does it form?
3Name three things that increase the chance of cataract before old age.
4Describe how cataract surgery is done.
5Why is Dr. Sanduk Ruit remembered in the treatment of cataract?
6Explain how we see a blue object as blue.
7What is colour blindness? What are its causes?
8What is night blindness? Why does a lack of vitamin A cause it?
9Differentiate between rod cells and cone cells.
10Spectacles correct short-sightedness. Why can they not cure a cataract?