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Solved 2016 Question Paper ICSE Class 10 Biology — Question 6

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Question 1(f)

Given below is a diagram depicting a defect of the human eye, study the same and then answer the questions that follow: [5]

Given below is a diagram depicting a defect of the human eye, study the same and then answer the questions that follow. Name the defect shown in the diagram. What are the two possible reasons that cause this defect? Name the type of lens used to correct this defect. With the help of a diagram show how the defect shown above is rectified using a suitable lens. ICSE 2016 Biology Solved Question Paper.

(i) Name the defect shown in the diagram.

(ii) What are the two possible reasons that cause this defect?

(iii) Name the type of lens used to correct this defect.

(iv) With the help of a diagram show how the defect shown above is rectified using a suitable lens.

Answer

(i) Myopia / short sightedness.

(ii) Two possible reasons that cause Myopia are:

  1. Eye ball is lengthened from front to back.
  2. Lens is too curved / rounded

(iii) Concave lens

(iv) Below diagram shows how a concave lens can be used to rectify Myopia:

With the help of a diagram show how the defect shown above is rectified using a suitable lens. ICSE 2016 Biology Solved Question Paper.