Focal Length Adjustment
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United States of America Patent
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Issued Date -
May 26, 2016
app pub date -
Jun 13, 2014
filing date -
Jun 14, 2013
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Abstract
A pair of spectacles comprises a pair of variable focal length lenses; an image acquisition system adapted to acquire images of each of a user's eyes; and a controller adapted to analyze the images to monitor the degree of vergence of the user's eyes, and to adjust a focal length of the variable focal length lenses to a value derived directly from the monitored degree of vergence.
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