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प्रश्न
A student sitting in the last row of the class-room is not able to read clearly the writing on the blackboard.
Name the type of defect he is suffering from.
उत्तर
The student is suffering from myopia (short-sightedness)
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संबंधित प्रश्न
Explain two possible reasons of myopia. How can it be corrected? Explain with a suitable diagram.
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What type of spectacle lens should he use to correct the defect?
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A person is unable to see distinctly the objects closer than 1 m. Name the defect of vision he is suffering from. Draw ray diagrams to illustrate the cause of the defect and its correction by suitable lens.
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Tears
Name the following:
The photosensitive pigment present in the rod cells of the retina.
Name an old age eye defect. Why is it caused?
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The diagram given below represents the cross-section of the human eye:
(i) Name the parts labeled 1—12.
(ii) What is the function of the part marked ‘10’?
(iii) What would happen if part ‘5’ is damaged or cut?
Draw ray diagram showing myopic eye.
