Ophthalmic devices having a highly selective violet light transmissive filter and related methods
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United States of America Patent
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Oct 9, 2007
Grant Date -
Nov 3, 2005
app pub date -
Apr 26, 2005
filing date -
Apr 30, 2004
priority date (Note) -
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Abstract
Ophthalmic devices are provided having a violet-light vertical cut-off filter abruptly absorbs light between the wave lengths of between approximately and 400 nm and 450 nm such that a curve when plotted as percent transmission versus wavelength has the shape as depicted in FIG. 2. In one embodiment the ophthalmic devices are made from acrylates and the light absorbing compound is an Eastman Yellow 035 MA dye.
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