Abstract: A method of cleaning and disinfecting a contact lens comprising immersing a contact lens in a treating solution, applying a direct current to the treating solution with repeatedly reversing a positive electrode and a negative electrode of a pair of electrodes plural times to generate peroxide and raise the temperature of the treating solution so that the interval of time before reversing is different from or equal to the interval of time after reversing to 50.degree. to 100.degree. C., and bringing the contact lens into direct contact with bubbles generated on the electrodes. Since this method is excellent in electrical safety and cleaning and disinfecting effects, contact lenses can be easily cleaned and disinfected.

Abstract: A liquid composition for contact lenses, which comprises from 0.01 to 5% (W/V) of a protease, from 5 to 30% (W/V) of a polyhydric alcohol, from 1 to 5% (W/V) of an alkali metal salt and from 0.5 to 20% (W/V) of a surfactant.

Abstract: A method for imparting a hydrophilic nature to a contact lens, which comprises dipping a contact lens in a solution containing a water-soluble amino group-containing polymer in an amount effective to impart a hydrophilic nature to the contact lens and a crosslinking agent in an amount effective to crosslink the amino group-containing polymer, and forming a hydrophilic layer of the amino group-containing polymer crosslinked on the surface of the contact lens.

Abstract: A method for cleaning and preserving a contact lens, characterized by using a treating solution containing an effective amount of a serine protease derived from bacteria belonging to genus Bacillus, a metal chelating agent, and boric acid and/or borax which stabilizes the serine protease at room temperature and having the osmotic pressure adjusted to a level of from 200 to 600 mOsm/kg-water, which method comprises dispensing the treating solution at the time of treatment, and immersing a contact lens in the dispensed treating solution.

Abstract: A cleaning-preserving aqueous solution for contact lenses, which contains, as a surfactant, a tetra-fatty acid polyoxyethylene sorbitol of the formula 1: ##STR1## wherein a+b+c+d+e+f=20 to 50, and four among R.sub.1 to R.sub.6 are C.sub.12-18 saturated or unsaturated fatty acid residues and the remaining two are hydrogen atoms, and which has a physiological osmotic pressure and has a pH adjusted to a level of from 4 to 9.

Abstract: An method for cleaning and disinfecting a soft contact lens, characterized by immersing the soft contact lens in a treating solution which does not generate any hypohalite during electrolysis, supplying a direct current, and raising the temperature of the treating solution; and a treating solution for a soft contact lens, characterized by containing a treating agent mainly composed of boric acid and borax in a concentration of at most 2.2 w/v % and having an electrical conductivity of at most 8 mS/cm are disclosed.

Abstract: A method for cleaning a contact lens, which comprises diluting an enzyme-containing aqueous solution containing an effective amount of serine protease and from 30 to 95% by weight of glycerol with a diluting solution containing from 0.05 to 5% by weight of an anionic surfactant having no polyoxyethylene glycol unit and from 0.005 to 0.1% by weight of ethylenediamine tetraacetate to a glycerol concentration of not higher than 5% by weight, to obtain a treating solution, and immersing a contact lens in the treating solution.

Abstract: A detergent for a contact lens comprising 40 to 80% by weight of fine particles of a water-soluble compound which has a salt value of at most 0.65 and a solubility in water of 3 to 30 at 30.degree. C. and at most 40 at 60.degree. C., with the product of the salt value and the solubility at 30.degree. C. being at most 10, and 100% of which passes a JIS standard sieve of a nominal size of 75 .mu.m, and 60 to 20% by weight of a pasting agent containing as a major component an aqueous dispersion of a gel composed of an acrylic acid compound having a recurring unit represented by the general formula (I): ##STR1## wherein R.sub.1 represents hydrogen atom and/or methyl group, R.sub.2 represents at least one member selected from hydrogen atom, sodium atom, potassium atom, lithium atom, NH.sub.

Abstract: A contact lens treating vessel equipped with an electromagnetic induction coil and a rectifier for converting an alternating current into a direct current, and an apparatus for treating contact lenses comprising a treating apparatus body for supplying electric power and the vessel which can be attached to or detached from the apparatus body, wherein the apparatus body is equipped with a magnet-generating coil and the vessel is equipped with an electromagnetic induction coil.

Abstract: A liquid composition for contact lenses, having from 5 to 40% (w/v) of glycerol and from 4 to 20% (w/v) of boric acid and/or a borate incorporated to a solution containing an effective amount of a protease, in such a ratio that the boric acid and/or the borate is from 10 to 100 parts, preferably 10-20 parts, by weight per 100 parts by weight of the glycerol.

Abstract: An method for cleaning and disinfecting a soft contact lens, characterized by immersing the soft contact lens in a treating solution which does not generate any hypohalite during electrolysis, supplying a direct current, and raising the temperature of the treating solution; and a treating solution for a soft contact lens, characterized by containing a treating agent mainly composed of boric acid and borax in a concentration of at most 2.2 w/v % and having an electrical conductivity of at most 8 mS/cm are disclosed.

Abstract: A method for tinting a water-absorptive contact lens to have a mark tinted thereon, which comprises superimposing on a water-absorptive contact lens in the dry state a screen provided with a tinting pattern corresponding to the mark to be tinted on the contact lens, applying to the contact lens through the tinting pattern of the screen a dye solution containing a vat dye and an alkaline reducing agent, followed by insolubilizing the vat dye.

Abstract: A graft copolymer produced by polymerizing 2-hydroxyethyl methacrylate, or monomer mixture containing the monomer, by using initiator produced by copolymerizing (A) N-vinyllactam or styrene and (B) peroxy-fumarate or combination of the peroxy-fumarate and diester of fumaric acid, the peroxy-fumarate being represented by the formula (I): ##STR1## wherein R1 is a linear alkyl, branched alkyl or cycloalkyl group containing not more than 18 carbon atoms, or an aromatic hydrocarbon group containing 6 to carbon atoms; and R2 is a linear alkyl, branched alkyl or cycloalkyl group containing not more than 13 carbon atoms, or a phenyl group.A solution for treating a contact lens, including the above graft copolymer and a solvent dissolving the copolymer.

Abstract: A hard contact lens material comprising a copolymer made of at least two kinds of fumaric acid diester at least one of which is a dialkyl fumarate as main components. The hard contact lens material has high oxygen permeability, transparance and excellent physical properties.

Abstract: A polymer-type polymerization initiator produced by copolymerizing (A) 40 to 60 mole % of an N-vinyllactam and (B) 60 to 40 mole % of at least one fumarate containing a peroxy group, the peroxy-fumarate (B) being represented by the following formula: ##STR1## wherein R1 is a linear alkyl, branched alkyl or cycloalkyl group containing not more than 18 carbon atoms, or an aromatic hydrocarbon group containing 6 to 18 carbon atoms; and R2 is a linear alkyl, branched alkyl or cycloalkyl group containing not more than 13 carbon atoms, or a phenyl group.The peroxy-fumarate (b1) may be used in combination with (b2) at least one diester of fumaric acid selected from the group consisting of alkyl fluoroalkyl fumarate, alkyl silicon-containing-alkyl fumarate, fluoroalkyl silicon-containing-alkyl fumarate, bis(fluoroalkyl) fumarate, and bis(silicon-containing-alkyl) fumarate, a mole ratio of the peroxy-fumarate to the diester of fumaric acid falling within a range of 9 to 1 to 1 to 9.

Abstract: A polymer-type polymerization initiator produced by copolymerizing (A) 40 to 60 mole % of an N-vinyllactam and (B) 60 to 40 mole % of at least one fumarate containing a peroxy group, the peroxy-fumarate (B) being represented by the following formula: ##STR1## wherein R1 is a linear alkyl, branched alkyl or cycloalkyl group containing not more than 18 carbon atoms, or an aromatic hydrocarbon group containing 6 to 18 carbon atoms; and R2 is a linear alkyl, branched alkyl or cycloalkyl group containing not more than 13 carbon atoms, or a phenyl group.The peroxy-fumarate (b1) may be used in combination with (b2) at least one diester of fumaric acid selected from the group consisting of alkyl fluoroalkyl fumarate, alkyl silicon-containing-alkyl fumarate, fluoroalkyl, silicon-containing-alkyl fumarate, bis(fluoroalkyl) fumarate, and bis(silicon-containing-alkyl) fumarate, a mole ratio of the peroxy-fumarate to the diester of fumaric acid falling within a range of 9 to 1 to 1 to 9.

Abstract: A device for dispensing a liquid, including a container having an interior space accommodating the liquid, a first valve attached to the container, a delivery path having one end submerged in the liquid and extending through the container such that the other end is outside the container, and a second valve disposed in the delivery path for closing and opening the delivery path. The first valve permits a pressurized gas to flow therethrough into the container to raise the pressure within the container, but inhibits a discharge flow of the pressurized gas and the liquid therethrough out of the interior space. The liquid is delivered out of the container through the delivery path, due to the raised pressure within the interior space. The device has a micro-porous membrane filter disposed in a portion of the delivery path which is located upstream of the second valve, as viewed in the direction of delivery of the liquid.

Abstract: A method for preparing a soft ocular lens, which comprises machining a machinably hard polymer blend body composed essentially of a soft lens material and a hard polymer into an ocular lens shape, and removing the hard polymer from the shaped product.

Abstract: A hard contact lens material comprising a copolymer made of at least two kinds of fumaric acid diester at least one of which is a dialkyl fumarate as main components. The hard contact lens material has high oxygen permeability, transparance and excellent physical properties.

Abstract: An optically transparent hydrogen forming material comprising a copolymer of an optically transparent polyester having a molecular weight of 1,000 to 100,000 and at least one of polymerizable group in its molecule and N-vinyllactam. The hydrogel forming material has an excellent optical property, high gas-permeability and excellent mechanical property.