Photochromic blue light filtering materials and ophthalmic devices
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United States of America Patent
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Issued Date -
Nov 17, 2005
app pub date -
May 4, 2005
filing date -
May 13, 2004
priority date (Note) -
Abandoned
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Abstract
Polymeric compositions have photochromic and blue-light filtering ability and are useful in the manufacture of ophthalmic medical devices. The polymeric compositions comprise a photochromic material incorporated into polymeric host materials and are activatable by blue light having a first wavelength range to become photochromic, and are thereby capable of absorbing blue light in a second wavelength range. Methods of making the compositions comprise incorporating a photochromic material into a polymeric host material.
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