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US Patent 9345401 Handheld vision tester and calibration thereof

Patent 9345401 was granted and assigned to Vital Art And Science, Llc. on May, 2016 by the United States Patent and Trademark Office.

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Patent abstract

In one aspect, there is provided an embodiment of a calibration system for use with a vision tester having a display. In this particular embodiment, the calibration system comprises a calibration stand and a reflective surface. The calibration stand is configured to hold the vision tester. The reflective surface is coupled to the calibration stand and is oriented substantially parallel to the display. The calibration stand is configured to hold the display of the vision tester at a fixed distance from the reflective surface.

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