Eyesight testing apparatus
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United States of America Patent
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Nov 12, 2013
Grant Date -
Apr 5, 2012
app pub date -
Sep 30, 2011
filing date -
Sep 30, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
An eyesight testing apparatus includes an imaging device for virtual imaging a test object located within a focal length of the imaging device and imaged at different distances into eyes of a subject located in a focal point of the imaging device, an optical deflection device arranged in a beam path between the imaging device and the test object to deflect the beam path by 180°, wherein the deflection device is displaceable in the direction of the beam path and the test object is not, a monitor device that generates the test object and that comprises a single monitor, optical components lying in the beam path sized so that both eyes are able to take part in a test, and so a partial beam path is formed for each eye, and a blocking device arranged in the beam path, which comprises two LCD blocking elements for the partial beam paths.
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