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What if the subjects were not seeing optimally but reported no symptoms?

April 26, 2017optimally reported seeing Subjects symptoms

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What if the subjects were not seeing optimally but reported no symptoms?

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It did not matter whether the subjects reported symptoms, or whether the miscorrection was small (0.5D) or large (1.0D). Productivity was significantly affected. Even individuals with no visual problems may still be losing productivity and accuracy at the computer.