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US 2015/0146160 A1Published application
Contact lenses with improved oxygen transmission
AssigneeJohnson & Johnson Vision Care, Inc.
InventorsPhilippe F. Jubin, Pierre-Yves Gerligand, Fang Yuan, Radhakrishnan Damodharan, Noel A. Brennan
Life of this patent
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Abstract
Contact lenses may be designed with locally thinned regions to increase oxygen transmissibility to the eye. The locally thinned regions are preferably positioned outside of the optic zone and in the thicker peripheral zone. For a contact lens formed from a specific material, creating local thinner regions, for example, dimples in the back curve surface of the lens, provides an effective and efficient means for increasing oxygen diffusion.
Claims12
An ophthalmic device, the device comprising:
- contact lenses, each contact lens including an optic zone, a peripheral zone surrounding the optic zone, a front curve surface and a back curve surface;
- and
- at least one discrete thinned region in the peripheral zone configured to increase oxygen transmissibility in the discrete thinned region and an area surrounding the discrete thinned region, the at least one discrete thinned region covers from about five percent to about seventy-five percent of the surface area of the peripheral zone, has a depth of between five and three-hundred microns.
Dependencies are inferred from the claim text.