What is long-sightedness? List two causes for development of long-sightedness. Describe with a r...

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What is long-sightedness? List two causes for development of long-sightedness. Describe with a ray diagram, how this defect may be corrected using spectacles.
Or
What is hypermetropia? State the two causes of hypermetropia. With the help of a ray diagram, show
(i) the eye defect hypermetropia, (ii) correction of - hypermetropia by using a lens.
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