Distinguish between:
Farsightedness and Nearsightedness
a.
Answers
Explanation:
nearsighted person sees near objects clearly, while objects in the distance are blurred. Farsightedness is the result of the visual image being focused behind the retina rather than directly on it. ... A farsighted person sees faraway objects clearly, while objects that are near are blurred.
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Answer:
Farsightedness:
1. This problem arises due to slight flattering of the eyeball.
2. The curvature of the cornea and eye lens decreases so that the converging power becomes less.
3. The distance between the eye lens and the retina decreases.
4. The near point of the eye shifts farther away from the eye.
5. A person suffering from this defect can see distant objects clearly but is unable to see nearby objects.
6. It can be corrected by using spectacles having convex lenses of suitable focal length.
Nearsightedness :
1. This problem arises due to slight elongation of the eyeball.
2. The curvature of the cornea and eye lens increases so that the converging power becomes more.
3. The distance between the eye lens and retina increases.
4. The far point of the eye shifts closer to eye.
5. A person suffering from this defect can see nearby objects clearly but is unable to see distant objects.
6. It can be corrected by using spectacles having concave lenses of suitable focal length.
Explanation:
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