UV/HEVL-filtering contact lenses
AssigneeAlcon Inc.
InventorsFrank Chang, Troy Vernon Holland, Adam K. Sniady, Houliang Tang
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Abstract
Described herein is UV/HEVL-absorbing contact lens of the invention comprises a bulk hydrogel material that comprises repeating units of at least one UV-absorbing vinylic monomer, repeating units of at least one UV/HEVL-absorbing vinylic monomer, and derivatives of a reactive Cu(II)-porphyrin present in selected amounts and at a selected ratio. A UV/HEVL-filtering contact lens of the invention not only can provide Class I UV protection against UVA and UVB rays (i.e., filtering more than 90% of UVA and 99% of UVB rays) but also can mimics the natural crystalline lens of a human eye in providing HEVL protection.
Claims20
A UV/HEVL-filtering contact lens, comprising a bulk hydrogel material that comprises:
- (1) repeating units of at least one hydrophilic vinylic monomer;
- (2) repeating units of at least one vinylic crosslinker;
- (3) repeating units of at least one UV-absorbing vinylic monomer that absorbs UV lights between 280 nm and 380 nm;
- (4) at least one UV/HEVL-absorbing vinylic monomer that absorbs UV lights between 280 nm and 380 nm and HEVL between 380 nm and 450 nm;
- and
- (5) derivatives of at least one Cu(II)-porphyrin, wherein the derivatives are covalently attached to the bulk hydrogel material and have an absorption peak in a region from 395 nm to 435 nm (i.e., a Soret peak or band) in visible absorption spectrum,
- wherein said components (3), (4) and (5) are present in the bulk hydrogel material in amounts and at a ratio for rendering the UV/HEVL-filtering contact lens to have a UVA % T of less than less 10%, UVB % T of less than 1%, a HEVL % T of about 60% or less, a % T at 420 nm of about 40% or less, and a % T of about 80% or greater at any wavelength between 450 nm and 500 nm.
Dependencies are inferred from the claim text.