Hybrid contact lens system and method of fitting
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United States of America Patent
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May 27, 2008
Grant Date -
Apr 12, 2007
app pub date -
Oct 11, 2005
filing date -
Oct 11, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A hybrid contact lens comprises a substantially rigid zone having an aspheric base curve with a given apical radius and a substantially flexible hydrophilic peripheral portion coupled to the substantially rigid zone, the peripheral portion having one of a plurality of radii, wherein a conic constant of the substantially rigid zone varies with apical radius, so as to provide a nearly constant deviation between the aspheric shape of the base curve and a sphere having a radius equal to the apical radius, regardless of the length of the apical radius.
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