Tomei Sangyo Kabushiki Kaisha

Akira Nakagawa

Yoshiko Oi

Kaoru Kamiya

Teruyo Komura

Satoko Kondo

Kisaki Maezawa

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.

Method for cleaning or preserving a contact lens by means of liquid

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.

Method for cleaning, preserving and disinfecting contact lenses

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.

Method for imparting a hydrophilic nature to a contact lens

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.

Cleaning-preserving aqueous solution for contact lenses and method for

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.

Method for cleaning a contact lens

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.

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Nagoya, Japan

Akira Nakagawa