Combined contact lens and method of manufacturing same

Details Combined contact lens and method of manufacturing same Combined contact lens and method of manufacturing same

G - Physics

02

C

18/106, 26/197,

G02C 7/04 (2006.01)

Patent

CA 1043598

ABSTRACT OF THE DISCLOSURE The invention relates to a combined contact lens comprising a zone of hydrophilic material, an aperture in the center of the zone, and a solid body of an optically transparent material fixed in the a?erture. The solid body is made as a rod bonded chemically with the zone. In accordance with the invention, the hydrophilic material is a hydroxyl-containing monomer, and the rod is a polymer which is inactive in water but which swells in the solution of the hydroxyl-containing monomer. The hydrophilic material is chemically bonded to the polymer by fusion. The invention also relates to a method for manufacturing the contact lens which consists of polymerizing a hydroxyl-containing monomer in the presence of a polymerization initiator, a solvent, and a linking agent in a mould. A rod is disposed in the center of the mould, and the rod is made from a polymer inactive in water but swelling in the solution of the starting hydroxyl-containing monomer. Thereby, a blank is formed which consists of a peripheral zone of a hydrophilic material chemically bonded to the rod.

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