question_answer

(a) Write the function of each of the following parts of human eye: Cornea; iris; crystalline lens; ciliary muscles.

(b) Millions of people of the developing countries of world are suffering from corneal blindness. These persons can be rules by replacing the defective cornea with the cornea of a donated eye. A charitable society of your city has organized a campaign in your neighbourhood in order to create awareness about this fact. If you are asked to participate in this mission how would you contribute in this noble cause?

(i) State the objective of organising such campaigns.

(ii) List two arguments which you would give to motivate the people to donate their eyes after death.

(iii) List two values which are developed in the persons who actively participate and contribute in such programmes.

Answer:

(a)         Cornea: Refracts the rays of light falling on the eye.

Iris: Controls the size of the pupil.

Crystalline lens: Focuses the image of the object on the retina.

Ciliary muscles: Holds the eye lens and adjusts its focal length.

(b)       (i) These campaigns are organised to make people aware and realise their duties towards society.

(ii) Following arguments can be given:

? One person can give sight to two people.

? Our eyes can live even after our death.

(iii) Values: Concern for others. Social welfare.