When the muscles of the eye remain tensed for a significant period of time, eyestrain results how

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When the muscles of the eye remain tensed for a significant period of time, eyestrain results how much is this a concern for a person using?
(a) A microscope,
(b) A telescope,
(c) A simple magnifier.

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Physics

ISBN: 978-0077339685

2nd edition

Authors: Alan Giambattista, Betty Richardson, Robert Richardson

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Question Posted: Jun 06, 2016 06:16 AM

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When the muscles of the eye remain tensed for a significant period of time, eyestrain results how

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The muscles in the eye are completely relaxed when ...View the full answer

Physics

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