What are presbyopia and astigmatism ?
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Astigmatism is an irregularity in the overall shape of the eye or the curvature of the cornea (the clear outer coating of the eye). Presbyopia occurs when the lens of the eye is no longer able to change shape. This typically takes place around age 40.
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Answer:
Explanation:
Astigmatism is an irregularity in the overall shape of the eye or the curvature of the cornea (the clear outer coating of the eye). Presbyopia occurs when the lens of the eye
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