ICSE-X-Biology
08: The Nervous System
- #4Given below is a diagram depicting a defect of the human eye. Study the same and answer the questions that follow:
(a) Name the defect shown in the diagram (b) Give two possible reasons for this defect (c) Name the parts labelled 1 to 4 (d) Name the type of lens used to correct this eye defect (e) Draw a labelled diagram to show how the above mentioned defect is rectified using the lens named above.Ans : (a) Myopia (b) The two possible reasons for myopia are either the eye ball is lengthened from front to back or the lens is too curved. (c) 1-vitreous humour, 2-blind spot, 3-lens, 4-pupil (d) Concave lens (e)
- #4-aName the defect shown in the diagramAns : Myopia
- #4-bGive two possible reasons for this defectAns : The two possible reasons for myopia are either the eye ball is lengthened from front to back or the lens is too curved.
- #4-cName the parts labelled 1 to 4Ans : 1-vitreous humour, 2-blind spot, 3-lens, 4-pupil
- #4-dName the type of lens used to correct this eye defectAns : Concave lens
- #4-eDraw a labelled diagram to show how the above mentioned defect is rectified using the lens named above.Ans :