Power of spectacles used by a person is 1.25d name the defects of vision he is suffering from
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Answer:
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The person having a positive power spectacles is suffering from
hypermetropia (farsightedness).
1. A person suffering from hypermetropja can see distant objects clearly as the image of a distant object is formed on the retina, but cannot see nearby objects clearly as the image of a nearby object would be formed behind the retina instead of on the retina.
2. A convex lens converges the rays of light passing through it.
3. When spectacles of convex lenses of appropriate power are used, the rays of light coming from a nearby object are converged to proper extent before they are incident on the eye lens.
Therefore, after the converging action of the eye lens, the image of a nearby object is formed on the retina of the eye and hence the nearby object can be seen clearly.