Why are bifocals needed mainly by older persons and not generally by younger people?

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Conceptual Physics

ISBN: 978-0321909107

12th edition

Authors: Paul G. Hewitt

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Question Posted: May 02, 2010 05:39 AM

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Why are bifocals needed mainly by older persons and not generally by younger people?

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As people get older their eyes can no longer accommodate as well It b...View the full answer

Conceptual Physics

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