Question

(i) Write the function of each of the following parts of human eye : Cornea; iris; crystalline lens; ciliary muscles (ii) Millions of people of the developing countries of world are suffering from corneal blindness. These persons can be cured by replacing the defective cornea with the cornea of a donated eye. A charitable society of your city has organized a campaign in your neighborhood 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 ? (a)State the objective of organizing such campaigns. (b) List two arguments which you would give to motivate the people to donate their eyes after death (c) List two values which are developed in the persons who actively participate and contribute in such programmes.

Answer 1

Explanation:

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Answer 2

Function of: Cornea; iris; crystalline lens; ciliary muscles.

1. Cornea – A transparent part of the eye that covers the front eye region and pupil is called as Cornea. It is responsible for eye focus and it acts as an agent to the light that enters eye.  
2. Iris -  It is a thin, circular color region of eye which is responsible for controlling the diameter & size of the pupil .
3. Crystalline lens – It is responsible for light rays entering into the eye and forms image on the retina.  
4. Ciliary muscles – It is responsible to control the focal length of the lens as per the image fell on the retina, hence one can have clear vision on an object.

Millions of people of the developing countries of world are suffering from corneal blindness. These persons can be cured by replacing the defective cornea with the cornea of a donated eye.

(a) Organizing campaigns help creating awareness among the people and can educate them that how one’s eye help others after death.

(b) - You can see one, seeing the world through your beloved one’s eyes after death.

       - Donating eyes to others is as equal to gifting someone with new world.

(c) Duly signed by the participant in the ‘eye donation’ agreement that he is ready to donate his eyes after death.