Multi-focal lenses with segmented boundaries
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United States of America Patent
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Oct 30, 2012
Grant Date -
Oct 27, 2011
app pub date -
Apr 22, 2010
filing date -
Apr 22, 2010
priority date (Note) -
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Abstract
The invention provides multi-focal segmented lenses with boundaries that include at least one blended portion and at least one sharp portion. The lenses may possess, for example, the aesthetic advantage of blended multi-segment or progressive lenses while largely retaining the functional advantage of multi-segment lenses with sharp segment boundaries.
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