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Distinguish between presbyopia and hypermetropia.

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Distinguish between presbyopia and hypermetropia.

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S.No. Hypermetropia Presbyopia
1. Only far-sightedness. It can be only far-sightedness or both far and short-sightedness.
2. Eye ball becomes short or the focal length increases. Ciliary muscles become weak and able to adjust the focal length.
3. Corrected by using convex lens. Corrected by using bifocal lens.
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