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Answer:
Hypermetropia: This type of error is called Hypermetropia if the eye can see distant objects clearly but not near objects.
This happens when a near point moves away from a person's eyes.Hypermetropia is seen when the size of the eyeball is smaller than normal or the focal length of the lens of the eye is increased.Suppose, N is near point of normal eye. For hypermetropia, the reflection of the point N is not formed in the retina but in the back of the retina and the eye forms the reflection of the nearest N' point in the retina by applying maximum adaptation. N' is hypermetropia near the point of the eye.[picture:a]
Remedy:
This error can be eliminated by using glasses with raised lenses of appropriate focus length. The focal length of the convex lens will be such that, after refraction by the lens, the odd image of point N is formed at point N'.[picture:b]
Explanation:
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