Biology
The diagram given below depicts a defect of the human eye which has been corrected by using a suitable lens. Answer the following questions:
(i) Name the defect that has been corrected. Which type of lens has been used for the correction?
(ii) Mention one cause for the above defect.
(iii) Where would the image have formed if the above lens was not used for correction?
(iv) Name the three concentric layers of the eyeball.
(v) Draw a neat, labelled diagram of a neuron.
Sense Organs
ICSE 2020
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Answer
(i) Myopia is the defect that has been corrected. Concave lens has been used.
(ii) Lens is too curved.
(iii) The image would have been formed in front of retina if the above lens was not used for correction.
(iv)
- Outer- Sclera
- Middle- Choroid
- Inner - Retina
(v) Diagram of a neuron with the parts labelled is shown below:
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