Abstract: An ocular lens material containing a polymer having a maleimide derivative-.alpha.-methylstyrene unit and N,N-dimethylacrylamide unit, which is excellent in optical property, has a high water-absorptive property and a high mechanical strength and further only shows an extremely small size change based on pH change of a solution under the hydrated state, and which can be preferably used for, in particular, water-absorptive contact lenses and the like, and a process for producing the same.

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 cleaning and disinfecting method for a contact lens comprising immersing a contact lens in a treating solution containing a hypohalogenous acid and applying a direct current to the treating solution with repeatedly reversing a positive electrode and a negative electrode plural times, or comprising immersing a contact lens in a solution for treatment containing a halide and applying a direct current to the solution for treatment with repeatedly reversing a positive electrode and a negative electrode plural times. According to the cleaning and disinfecting methods, a contact lens can be cleaned up and disinfected by excellent disinfecting ability and cleaning ability of the hypohalogenous acid, and after that, the hypohalogenous acid can be immediately reduced and detoxicated.

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 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: 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: Herein disclosed is a tiltable hanger apparatus including an overhead track assembly and a work-carrying assembly movable below and along the overhead track assembly. The work-carrying assembly is composed of a main carrier frame suspended from the overhead track assembly, an auxiliary carrier frame supported by the main carrier frame and arranged to be tiltable with respect to the main carrier frame in a fore-and-aft direction of the work-carrying assembly, and a hanger frame supported by the auxiliary carrier frame and angularly movable with respect to the auxiliary carrier frame about an axis normal to a plane perpendicular to the fore-and-aft direction of the work-carrying assembly. The auxiliary carrier frame is caused to tilt with respect to the main carrier frame in a fore-and-aft direction of the work-carrying assembly by the aid of a first set of guide rollers and rails.