Progressive Addition Lens for a Wearer
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United States of America Patent
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Issued Date -
Apr 2, 2015
app pub date -
Mar 25, 2013
filing date -
Mar 23, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A progressive addition lens for a wearer, the optical lens having an addition lower by at least 0.5 diopter to the prescribed addition value of the wearer, wherein for a pupil diameter of 4 mm the modulation transfer function is greater or equal to 0.1 when measured for a spatial frequency comprised between 0 and 20 cycles per degree
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