Abstract: The present invention relates to a method and a lens detection station for detecting the presence or absence of an ophthalmic lens capable of absorbing UV-light, in particular a contact lens, in a receptacle. The method comprises the steps of: irradiating at least a portion of said receptacle where said ophthalmic lens is supposedly accommodated with UV-light, said receptacle having an absorbance for said UV-light which is significantly different from that of the ophthalmic lens, detecting UV-light coming from said irradiated portion of said receptacle where said ophthalmic lens is supposedly accommodated, analyzing said detected UV-light, and from said analysis of said detected UV-light determining the presence or absence of a said ophthalmic lens.

Abstract: A toric contact lens (1) having a front surface and a rear surface, one of said front and rear surfaces includes a toric optical zone and a lens edge surrounding the contact lens (1). The contact lens further has a ballast axis (3) and includes at least one ballast mark (41, 42, 43) identifying the position of the ballast axis (3). Each ballast mark (41, 42, 43) includes a one-dimensional dot pattern (5) having a lens identification code and being arranged to extend radially towards the lens edge at an angular position relative to the position of the ballast axis (3). The angular position of the one-dimensional dot pattern identifies the position of the ballast axis.

Abstract: A method for determining the presence of an electrical charge on a surface of an ophthalmic lens mold including the steps of exposing a sensor crystal of a sensor element to a surface of an ophthalmic lens mold on which an electrical charge generating an electrical field may be present, converting a light beam emitted from a laser light source into a linearly polarized measurement light beam by passing the light beam through the sensor element, processing the linearly polarized measurement light beam exiting the sensor element in a measurement unit, wherein the sensor crystal is selected from a non-centrosymmetrical crystallographic point group 43 m.

Abstract: A method for detecting the presence or absence of an ophthalmic lens (10), in particular of a contact lens, within a receptacle (1), including the steps of: detecting infrared radiation coming from at least a portion (3) of the receptacle (1) where the ophthalmic lens (10) is supposedly accommodated, analyzing the detected infrared radiation in a spectral portion in which absorbance (AL) of a material the ophthalmic lens is made of is significantly different from absorbance (AR) of a material the receptacle is made of, and from the analysis of the spectral portion detecting the presence or absence of the ophthalmic lens (10) within the receptacle.

Abstract: This invention is directed to a process for applying a symbol to a molded device which symbol on the molded device is visible as an indentation in the surface of the device. The process involves the step of applying the symbol as an elevation to the mold before using the mold for making the molded device. The process of the invention is characterized in that the elevation on the mold is produced by applying a material to the mold surface which material is liquid when being applied and which material is applied at a temperature higher than the temperature which is at or preferably below the melting point of the material, and which material solidifies at the temperature of the mold. The material applied to the mold and solidified on the mold surface as an elevation needs to remain solid during the process of using the mold for making the molded device. During the molding process the elevation of the symbol on the mold is transferred as an indentation of the symbol to the surface of the molded device.

Abstract: A method for determining the presence of an electrical charge on a surface of an ophthalmic lens mold (1, 10), the method including the steps of exposing a sensor crystal (22) of a sensor element (2) to a surface of an ophthalmic lens mold (1) on which an electrical charge generating an electrical field may be present, converting a light beam (31) emitted from a laser light source (3) into a linearly polarized measurement light beam (34) by passing the light beam (31) through the sensor element (2), processing the linearly polarized measurement light beam (34) exiting the sensor element (2) in a measurement unit (4), wherein the sensor crystal is selected from a non-centrosymmetrical crystallographic point group 43m.

Abstract: A method for detecting the presence or absence of an ophthalmic lens (10), in particular of a contact lens, within a receptacle (1), including the steps of: detecting infrared radiation coming from at least a portion (3) of the receptacle (1) where the ophthalmic lens (10) is supposedly accommodated, analyzing the detected infrared radiation in a spectral portion in which absorbance (AL) of a material the ophthalmic lens is made of is significantly different from absorbance (AR) of a material the receptacle is made of, and from the analysis of the spectral portion detecting the presence or absence of the ophthalmic lens (10) within the receptacle.

Abstract: An ophthalmic lens (1) has a front surface (2) and a rear surface, each of the front and rear surfaces comprising a central optical zone (4) which is surrounded by a peripheral zone (3). The ophthalmic lens (1) further comprises a unique lens identification code which is arranged in the peripheral zone (3) of one of said front and rear surfaces. The unique lens identification code has the form of an N×M dot matrix (5) comprising N rows and M columns of matrix elements (50), and the N×M dot matrix (5) represents a binary code.

Abstract: This invention is directed to a process for applying a symbol to a molded device which symbol on the molded device is visible as an indentation in the surface of the device. The process involves the step of applying the symbol as an elevation to the mold before using the mold for making the molded device. The process of the invention is characterized in that the elevation on the mold is produced by applying a material to the mold surface which material is liquid when being applied and which material is applied at a temperature higher than the temperature which is at or preferably below the melting point of the material, and which material solidifies at the temperature of the mold. The material applied to the mold and solidified on the mold surface as an elevation needs to remain solid during the process of using the mold for making the molded device. During the molding process the elevation of the symbol on the mold is transferred as an indentation of the symbol to the surface of the molded device.

Abstract: An ophthalmic lens (1) has a concave front surface (2) and a convex rear surface, each of the front and rear surfaces comprising a central optical zone (4) which is surrounded by a peripheral zone (3). The ophthalmic lens (1) further comprises a unique lens identification code which is arranged in the peripheral zone (3) of one of said front and rear surfaces. The unique lens identification code has the form of an N×M dot matrix (5) comprising N rows and M columns of matrix elements (50), and the N×M dot matrix (5) represents a binary code.