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US 9,869,884 B2Granted
Contact lens
AssigneeInnovega, Inc.
InventorsWilliam E. Meyers, Jerome A. Legerton, Jay P. Marsh
Life of this patent
Estimating the term…
Abstract
A contact lens constructed to limit the water transmissibility of at least one area of the lens while maintaining at least a minimum oxygen transmissibility. The water transmissibility maximum and oxygen permeability minimum are achieved by a predetermined lens thickness of a single lens material or by the use of two or more material layers.
Claims31
A composite film comprising a primary material film and a secondary material film,
- where the composite film has a thickness, a permeability for oxygen, and a permeability for water;
- where the primary material film and secondary material film each has a thickness, a permeability for oxygen, and a permeability for water;
- where the thickness of the composite comprises the summed thicknesses of the primary material film and secondary material film, where the thickness of the primary material film and the thickness of the secondary material film are such that the difference between the permeability for oxygen of the composite film and the permeability for oxygen of the primary material film is less than the difference between the permeability for water of the composite film and the permeability for water of the primary material film.
A contact lens comprising a composite film,
- where the composite film comprises a layered primary material film and a layered secondary material film, where the composite film has a thickness, a permeability for oxygen, and a permeability for water;
- where the primary material film and secondary material film each have a thickness, a permeability for oxygen, and a permeability for water;
- where the thickness of the composite comprises the summed thicknesses of the primary material film and secondary material film, where the thickness of the primary material film and the thickness of the secondary material film are such that the difference between the permeability for oxygen of the composite film and the permeability for oxygen of the primary material film is less than the difference between the permeability for water of the composite film and the permeability of water of the primary material film.
Dependencies are inferred from the claim text.