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The Human Eye and Colourful World
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28/08/2021 7:04 pm
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What is presbyopia? Write two causes of this defect. Name the type of lens which can be used to correct presbyopia.
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28/08/2021 7:04 pm
Presbyopia is that defect of vision due to which an old person cannot see the nearby objects clearly due to loss of power of accommodation of the eye.
Causes: Gradual weakening of the ciliary muscles and diminishing flexibility of the eye lens.
It can be corrected by using convex lenses.