FIELD: medicine.
SUBSTANCE: invention relates to silicone hydrogel contact lens. Contact lens possesses layered structural configuration and gradient of water content from internal to external part of silicone hydrogel contact lens. Lens includes silicone hydrogel core or volumetric material, fully covered with external hydrogel layer, possessing thickness, equal not less than 0.1 mcm, measured by means of atomic power microscopy on section from posterior surface to anterior surface of silicone hydrogel contact lens in completely hydrated condition. External hydrogel layer mainly does not contain silicon. Content of water in external hydrogel layer is not less than 1.2 times larger than content of water in silicone hydrogel volumetric material in completely hydrated condition.
EFFECT: invention provides increased time of contact lens wearing.
42 cl, 9 dwg, 11 tbl, 33 ex
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