Silicone hydrogel contact lenses having non-uniform morphology

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.