Silicone hydrogel contact lenses having non-uniform morphology
AssigneeJohnson & Johnson Vision Care, Inc.
InventorsAzaam Alli, Donald E. Riederer, Alexander Guzman, Bernardo Santa Maria
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Abstract
Described is a silicone hydrogel contact lens having non-uniform morphology. The contact lens may be made from a reactive mixture comprising: a silicone-containing component; a hydrophilic component; a non-reactive polymeric internal wetting agent; and a polymerization initiator, the contact lens having an oxygen permeability of at least about 60 barrers, and wherein the molar ratio in the lens of the polymeric non-reactive internal wetting agent to silicone, without a surface treatment, is greater in the lens's surface than in its bulk.
Claims22
A silicone hydrogel contact lens that is a reaction product of a reactive mixture comprising:
- a silicone-containing component;
- a hydrophilic component;
- a non-reactive polymeric internal wetting agent;
- and a polymerization initiator, wherein at least one of the silicone-containing component and the hydrophilic component contains a methacrylate, the contact lens having an oxygen permeability of at least about 60 barrers, and wherein the molar ratio in the lens of the polymeric non-reactive internal wetting agent to methacrylate, without a surface treatment, is greater in the lens's surface than in its bulk.
A method for manufacturing a contact lens, the method comprising:
- (a) providing a reactive mixture comprising a silicone-containing component;
- a hydrophilic component;
- a non-reactive polymeric internal wetting agent;
- and a polymerization initiator, wherein at least one of the silicone-containing component and the hydrophilic component contains a methacrylate;
- and
- (b) polymerizing the reactive mixture to form the contact lens;
- wherein the method is conducted under conditions such that the contact lens has a molar ratio of the polymeric non-reactive internal wetting agent to methacrylate, without a surface treatment, that is greater in the lens's surface than in its bulk.
Dependencies are inferred from the claim text.