SILICONE HYDROGEL LENSES WITH WATER-RICH SURFACES

摘要

THE INVENTION IS RELATED TO A HYDRATED SILICONE HYDROGEL CONTACT LENS HAVING A LAYERED STRUCTURAL CONFIGURATION: A LOW WATER CONTENT SILICONE HYDROGEL CORE (OR BULK MATERIAL) COMPLETELY COVERED WITH A LAYER OF A HIGHER WATER CONTENT HYDROGEL TOTALLY OR SUBSTANTIALLY FREE OF SILICONE. A HYDRATE SILICONE HYDOGEL CONTACT LENS OF THE INVENTION POSSESSES HIGH OXYGEN PERMEABILITY FOR MAINTAINING THE CORNEAL HEALTH AND A SOFT, WATER-RICH, LUBRICIOUS SURFACE FOR WEARING COMFORT.