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The Picture Given Here Shows a Person Wearing 'Half-moon' Spectacles. What Sort of Eye-defect Do Do You Think He Has? Why Are These Particular Spectacles Useful to Him? - CBSE Class 10 - Science

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Question

The picture given here shows a person wearing 'half-moon' spectacles. What sort of eye-defect do do you think he has? Why are these particular spectacles useful to him?

Solution

As the person is wearing half-moon spectacles, he should be suffering from the eye defect called long-sightedness, or hypermetropia, because his spectacles are fitted with convex lens. The convex lenses form the images of nearby objects at the near point of his eye, and he can, therefore, see these objects clearly.

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Solution The Picture Given Here Shows a Person Wearing 'Half-moon' Spectacles. What Sort of Eye-defect Do Do You Think He Has? Why Are These Particular Spectacles Useful to Him? Concept: Defects of Vision and Their Correction.
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