Menicon Co., Ltd.

Shin-etsu Chemical Co., Ltd.

Mitsubishi Gas Chemical Company, Inc.

Nitto-denko Corporation

Kowa Company Limited

Kazuhiko Nakada

Hiroaki Suzuki

Shoji Ichinohe

Toshio Yamazaki

Tsuyoshi Watanabe

Makoto Ichikawa

Tetsuji Kawai

Masahiko Minemura

Kazuharu Niwa

Akihisa Sugiyama

Takahiro Adachi

Haruyuki Hiratani

Yasuhiko Suzuki

Kenichi Ishihara

Yuuji Gotou

Misako Nishibayashi

Mamoru Hagiwara

Akihiro Yasuda

Masaki Baba

Ryo Matsushita

Kotaro Sakanishi

Yutaka Matano

Yasuhito Hishida

Chikako Nakamura

Akiko Okumura

Kunihisa Yoshida

Noriko Yoshimatsu

Atsuyuki Nakamura

Naomi Saito

Sadanori Ohno

Tatsuya Hayashi

Hideto Kato

Kazumi Higashi

Eri Ito

Kiichiro Matsushita

Akira Yamamoto

Kohsuke Satake

Yoshinori Yoshida

Kazuhide Fujita

Akinori Okumura

Hidenari Tanaka

Masahiro Matsumoto

Sadanori Oono

Koji Otani

Hiroko Nomura

Yoshiyuki Ikeda

Takahito Nakase

Yoshihiro Tomono

According to the present invention, a contact lens material being excellent in oxygen permeability and transparency, being capable of undergoing injection molding, having no water content and having flexibility is provided. The present invention also relates to a contact lens gel material having excellent oxygen permeability and transparency. Particularly, the present invention relates to a contact lens material comprising a polycarbonate resin derived from a bisphenol compound (A), a polysiloxane-substituted bisphenol compound (B) and a compound forming a carbonic acid ester.

Contact lens material

The present invention provides a hybrid soft contact lens including a central portion formed with a first hydrous soft material, and a peripheral portion formed with a second hydrous soft material, in which the first hydrous soft material is obtained by curing a first curable composition including a silicone-containing monomer. Preferably, the first hydrous soft material has a Young's modulus of no less than 3.0 MPa and no greater than 100 MPa, and the second hydrous soft material has a Young's modulus of no less than 0.20 MPa and less than 3.0 MPa.

Hybrid soft contact lens, and production method and hydration treatment method thereof

A method of producing a medical instrument whereby a highly hydrophilic and lubricant coating layer having a high durability can be formed by a simple technique and thus highly hydrophilic and lubricant properties can be imparted to a surface of a medical instrument. An intraocular lens insertion instrument having been subjected to a surface treatment as described above is also provided. The method includes preparing a coating solution by mixing at least a water-insoluble polymer having carboxyl group and a polyfunctional reactive compound with an organic solvent; applying this solution on the surface of the medical instrument; conducting crosslinking; and performing a chemical reaction process. The coating layer is made hydrophilic. The intraocular lens insertion instrument is made hydrophilic by forming the coating layer as described above on an inner surface of an insertion tube portion, crosslinking and then performing the chemical reaction process.

Method of producing medical instrument

According to the present invention, a contact lens material being excellent in oxygen permeability and transparency, being capable of undergoing injection molding, having no water content and having flexibility, as well as a contact lens gel material having excellent oxygen permeability and transparency can be provided. The present invention relates to a contact lens material comprising a polycarbonate resin derived from at least two compounds among compounds represented by a general formula (A), a general formula (B) and a general formula (C), a highly polar molecular weight control modifier (chain terminator) and a compound forming a carbonic acid ester, wherein the compound of the general formula (A) is essentially comprised, and to a production method thereof.

Method for producing polycarbonate material having excellent solubility and affinity, and contact lens material comprising the same

A transparent gel is disclosed which has an interpenetrating polymer network of a copolymer containing a polysiloxane structure and a polycarbonate structure and a hydrophilic polymer obtained by polymerizing a hydrophilic monomer. The transparent gel is useful as a cultivation substrate, a container for storage and an ophthalmic material, comprising an easily synthesizable and purifiable silicon-containing resin, wherein a gel strength, transparency, oxygen permeability, birefringence and other characteristics are excellent.

Transparent gel and contact lense from the same

It is an object to provide a novel system for supporting contact lens users, who has not been provided with an after-selling support sufficiently, which is able to provide an appropriate support to individual contact lens user so that he can use contact lenses with comfortable. In order to attain the object, an image signal of the user's currently used contact lenses () acquired by a user client apparatus () is transmitted via communication network means (), to a server apparatus () of a supporting entity (). The server apparatus () then obtains lens condition evaluation data, which are stored in memory means () and transmitted via the communication network means () to the user client apparatus () so that the user () can be provided with the lens condition evaluation data.

Contact lens user support system and support method

A method of disinfecting a contact lens is provided, including the steps of preparing a disinfecting liquid which contains hydrogen peroxide and at least one metal phthalocyanine compound dispersed or dissolved in an aqueous medium, immersing the contact lens in the disinfecting liquid, and irradiating the disinfecting liquid in which the contact lens is immersed with a light.

Method of disinfecting contact lens and disinfecting liquid for the method

A highly safe liquid preparation for contact lenses which contains 0.3 to 50 ppm of a polyamine having recurring units of the formula (I): wherein n is 0 or 1, and which has a high antibacterial effect even at low concentrations.

Liquid preparation for contact lenses

It is intended to provide a method of selecting a contact lens suitable for a wearer and/or a care system therefor, by which the occurrence of problems (for example, worsening in the feel during wearing, lowering in the oxygen permeability of the lens, shortening in the lens life, lowering in the visual acuity, corneal injury, etc.) can be minimized to thereby ensure a high safety for the eye, namely, a method which comprises collecting the lacrimal fluid of a wearer, detecting the protein content and/or the lipid content in the lacrimal fluid thus obtained (Step S), estimating the dirt adhesion characteristics of the wearer to a contact lens based on the protein content and/or lipid content thus detected, and then selecting a contact lens suitable for the wearer and/or a care system therefor from among a plurality of contact lenses and a plurality of care systems (Step S).

Method of selecting contact lens and/or care system therefor

A method of obtaining particulars or characteristics of an ophthalmic lens by detecting a fluorescent light which is emitted from the ophthalmic lens upon exposure to an excitation light (UV light). The particulars or characteristics of the ophthalmic lens include, for instance, identifying marks such as characters, figures, symbols, etc. which are formed in the ophthalmic lens to identify the ophthalmic lens, a thickness of the ophthalmic lens such as a contact lens and an intraocular lens, and an angular position of the ophthalmic lens, particularly of a special contact lens having circumferential portions having respective different thickness values.

Method of obtaining particulars of ophthalmic lens

It is an object of the present invention to provide an ophthalmic lens characterized in that it is capable of developing a color at a position where a light is irradiated, and to provide a marking method of the ophthalmic lens. It is another object of the present invention to provide an ophthalmic lens, which can form a clear and easily readable mark, without causing problems such as discoloration of the mark, caused by cleaning of the lens by rubbing, or deterioration of the mechanical strength of the lens, and to provide a marking method of the ophthalmic lens. The ophthalmic lens of the present invention is obtained by a polymerization of a polymerizable composition of monomers, which contains an alkyl (meth)acrylate as an essential polymerizable component, and this polymerization is carried out while the rhodamine derivative is present in the composition.

Lens for eye and method for marking thereof

An ocular lens material comprising a copolymer prepared by polymerization with heating of a monomer mixture and/or with irradiating a monomer mixture with ultraviolet ray by means of a molding method, the monomer mixture containing a polysiloxane macromonomer A, a Si-containing alkyl methacrylate B, a hydrophilic monomer C comprising NVP as C-1 and another hydrophilic monomer C-2, another monomer D and a crosslinkable monomer E comprising a crosslinkable monomer E-1 containing at least one group selected from acryloyl group, vinyl group and allyl group, and methacryloyl group, and a crosslinkable monomer E-2 containing at least two methacryloyl groups as main components, wherein (A+B)/C (weight ratio) is 30/70 to 70/30, A/B is 25/75 to 75/25, C-1/C-2 is 50/50 to 100/0, the amount of D is 0 to 20% by weight in the monomer mixture, which has high oxygen permeability, high mechanical strength, excellent surface wettability and low surface frictional property.

Ocular lens material

A method of marking an ophthalmic lens, including a step of irradiating the ophthalmic lens formed of a resin material with a laser radiation, such that the laser radiation is condensed at each of predetermined at least one spot within the ophthalmic lens, to form a whitened portion at the each of the predetermined at least one spot, for thereby providing the ophthalmic lens with a marking.

Method of marking ophthalmic lens by using laser radiation

A method of marking an ophthalmic lens, including a step of irradiating the ophthalmic lens formed of a resin material with a laser radiation of a femtosecond pulse width, such that the laser radiation is condensed at each of at least one predetermined spot within the ophthalmic lens, to form a whitened portion at the each of the at least one predetermined spot, for thereby providing the ophthalmic lens with a marking.

Method of marking ophhalmic lens by using laser radiation of femtosecond pulse width

A method of disinfecting a contact lens is provided, including the steps of preparing a disinfecting liquid which contains water-dispersible fine particles of a titanium oxide dispersed in an aqueous medium, immersing the contact lens in the disinfecting liquid; and irradiating the disinfecting liquid in which the contact lens is immersed, with a light.

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Nisshin, Japan

Kazuhiko Nakada