Patent 7304117 was granted and assigned to Bausch & Lomb on December, 2007 by the United States Patent and Trademark Office.
Novel azo-based reactive yellow dyes and a process for manufacturing and using ocular devices having blue light absorption properties. Intraocular lenses so produced block blue light from reaching the retina of an eye implanted with the IOL. By blocking blue light from reaching the retina, the IOL thereby prevents potential damage to the retina.