V-Shape Progressive Lens Design
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United States of America Patent
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Issued Date -
Aug 11, 2011
app pub date -
Dec 9, 2010
filing date -
Dec 10, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Progressive lens designs are provided with various features relative to the corridor width, corridor length, and relative positioning of areas of maximum gradient power progression and maximum gradient, that differ from conventional progressive lens designs. Progressive lenses according to the invention may include a “V-shaped” cylinder map, a relatively low position of maximum gradient of power progression, and/or a large vertical separation between vertical position of maximal cylinder and vertical position of maximum gradient of power progression.
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