Question

VERY SHORT ANSWER TYPE QUESTIONS


1. What type of lens/method are followed to correct (a) Cataract (b) Myopia?


2. Name the defect of vision in which the eye-lens loses its power of

accommodation due to old age.


3. What is the far point of a person suffering from myopia?


4. What are the two other names of hypermetropia?


5. You friend can read a book perfectly well but cannot read the writing on

black-board unless she sits on the front row in class. Is she short-sighted or

long-sighted?


SHORT ANSWER TYPE QUESTIONS


1. Differentiate between Hypermetropia and Myopia.


2. What is presbyopia? Write two causes of this defect. Name the type of lens

which can be used to correct presbyopia.


3. What is astigmatism? Name the correction lens used.


4. How is the amount of light entering the eye controlled?


LONG ANSWER TYPE QUESTIONS


1. (a) What happens to the size of pupil of our eye in

(i) dim light, (ii) bright light ?

(b) Name the cells on the retina sensitive to

(i) bright light, (ii) dim light.


2. (a) Draw a simple diagram of the human eye and label clearly the cornea,

iris, pupil, ciliary muscles, eye lens, retina and optic nerve.

(b) Describe the working of the human eye with the help of the above diagram.​

Answer 1

Answer:

Friends please write it with proper spelling