Identify the eye having defective vision from the following diagrams. Write thetype of defect in vision. How this defect can be removed?
Identify the eye having defective vision from the following diagrams. Write thetype of defect in vision. How this defect can be removed?
Ans: – (A) Short-sightedness which removed by using diverging lens.
(B) No defect
(C) Long-sightedness which removed by using converging lens.
Three students Riya, Tiya and Jiya in a class are using sphericals of power +2D,+4D and –2D. What type of defect in vision they have?
Ans: – As we know the positive power will show the defect of longsideness so Riya, Tiya, has this problem where as Jiya have shortsideness problem as his power is negative
How does the focal length of the eye changes when a lens is used to correctthe defect of vision in case of (i) short sightedness and (ii) long or for sightedness.
Ans: – The focal length will be increased in shortsideness and decrease in case of long sightedness problem.
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