A person is able to see objects clearly only when these are lying at distance between 50 cm and 300 cm from his eyes. Answer the below questions by reading the above information.
1. Name the defect of vision he is suffering from.
(i) Myopia
(ii) Hypermetropia
(iii) Both A and B
2. The far point of the person is 300 cm that's less than infinity so he will be suffering from which defect ?
(i) Myopia
(ii) Hypermetropia
3. The near point of the person is 50 cm that is more than 25 cm so he will be suffering from which defect?
(i) Myopia
(ii) Hypermetropia
4 What is the term bifocal lenses mean ?
(i) Lenses with upper concave and lower convex surface.
(ii) Lenses with lower concave and upper convex surface.
5. Which lens is used for the clear vision of a person who is suffering from both myopia and hypermetropia ?
(i) Cylindrical lens
(ii) Bifocal lens
