Pupil-only photochromic contact lenses displaying desirable optics and comfort
AssigneeJohnson & Johnson Vision Care, Inc.
InventorsDonnie J. Duis, Yongcheng Li, Leilani K. Sonoda, Holly L. Grammer
Life of this patent
Estimating the term…
Abstract
A method for making a hydrogel, photochromic contact lens including supplying a first lens composition comprising a contact lens monomer and a photochromic material to a front contact lens mold and supplying a second lens composition to said contact lens mold wherein the viscosity of said first composition is at least about 1000 cp greater than the viscosity of said second contact lens composition, and the makeup of said second composition matches the of said first composition to reduce strain between said compositions of the resulting lens.
Claims10
A hydrogel contact lens comprising:
- a pupillary region containing a pupil hydrogel composition containing a photochromic dye and an outer region formed from the reaction of a substantially clear monomer composition wherein said pupillary region is photochromic and concentric with said outer region;
- and said hydrogel contact lens comprises a modulus of less than about 200 psi and a center sagittal depth within 100 microns of design sagittal depth, wherein the photochromic dye is formed from a compound selected from the group consisting of:
Dependencies are inferred from the claim text.