Hoya Corporation

Chacott Kabushiki Kaisha

Makoto Tsuchiya

Yuuichi Yokoyama

Hideyuki Futamura

Hidetoshi Iwamoto

Masashi Nomura

Shigeharu Onozuka

Masanori Daicho

The present invention relates to a process for producing a cyanopsia-correctable intraocular lens, which process is characterized by, in polymerizing a monomer capable of forming a transparent lens material upon polymerization to obtain an intraocular lens, adding, as an essential component, at least one member of yellow, yellowish brown and orange colorants and, as an optional components, an U.V. absorber and a crosslinking monomer. The intraocular lens obtained by the present invention has a light absorption characteristic close to that of human crystalline lens and is effective for correction of cyanopsia.

Process for producing cyanopsia-correctable intraocular lens

Contact lens

A brief in which there is provided a shaping portion in a front portion of the brief for shaping the formation of a swell at the front of the brief at the position corresponding to the male genitalia. The shaping portion has a concave inner surface and a convex outer surface and is composed of a three-layer construction including an outer cloth, an inner cloth, and a soft synthetic resin layer. There is provided a concave portion for receiving the male genitalia at the inner surface of the shaping portion and the outer surface of the shaping portion is formed with a convex formation, and there is provided a fixing portion at the open ends of the concave portion. The shaping portion has a hard synthetic resin layer inside the shaping portion, and a receiving bag is mounted inside the resin layer to insert a shaping member into the receiving bag.

Brief

The present invention relates to a high water content soft contact lens containing 50-70% of water, obtained by copolymerizing five particular monomers at particular proportions. The high water content soft contact lens of the present invention has excellent durability to stain removers, a high mechanical strength and excellent shape retention.

High water content soft contact lens

A copolymer composed mainly of at least one monomer component selected from fluorine-containing (meth)acrylates and silicone-containing (meth)acrylates and a siloxane oligomer having a polymerizable functional group at the molecular terminals is useful as an oxygen-permeable hard contact lens material with excellent impact resistance.

Growing community of inventors

Honjo, Japan

Makoto Tsuchiya