A multi-layered element (10) for manufacturing spectacle frames (1) comprising at least one layer of polymeric material (5). The multi-layered element (10) is a front piece (2) or a side piece (3) of a spectacle frame (1). Moreover, the multi-layered element (10) comprises at least one layer of metallic material (6) joined to the layer of polymeric material (5) by means of a layer of adhesive material (7). The invention also relates to a spectacle frame (1) comprising one or more multi-layered elements (10) and a method for manufacturing a multi-layered element (10).

A method for purifying powdered silicon carbide is in the form of a starting material to form a silicon carbide having a purity of at least 99.9%. This method has the following method steps: providing a starting material having a grain size of less than 100 μm and a silicon carbide content with at least 98% purity; and heating the starting material in a vacuum or oxygen-free atmosphere to a temperature above 1700° C. over a period of at least 8 minutes.

A method for purifying powdered silicon carbide is in the form of a starting material to form a silicon carbide having a purity of at least 99.9%. This method has the following method steps: providing a starting material having a grain size of less than 100 μm and a silicon carbide content with at least 98% purity; and heating the starting material in a vacuum or oxygen-free atmosphere to a temperature above 1700° C. over a period of at least 8 minutes.

A device and method for altering the appearance of any eyeglasses by generating and applying an eyewear appliqué. Users may alter the façade of eyeglasses without the cost of new glasses. Users may create a profile including a frame scan file from a camera or scanner and specific design elements to create a vector file that is processed by the appliqué application to produce an appliqué with alternative design elements. The appliqué application produces an appliqué from the scan file and user preferences. The appliqué is peeled from the release liner to and then pressed onto the user's frame to create the newly designed eyewear appliqué and custom look. The adhesive used in the production process allows the eyewear appliqués to be removed from frames and reapplied multiple times. The user can easily remove an eyewear appliqué by peeling and replacing it with another for an alternative look.

This invention refers to armless spectacles made from a sheet of material that includes at least a second folding line in stabilisation means. The invention proposes several methods of ensuring the second line and offering even greater rigidity. The spectacles can be converted from a non-functional state into a functional assembled state suitable for use by manipulating the configuration of at least one stabilising means in the bridge area. The spectacles have an enhanced rigidity thus increasing the overall stability of the spectacles during use. They can be presented basically flat for storage or transport and be easily manipulated to achieve the configuration for use. The spectacles may further present enhanced fastening and handling means that increase fastening stability as well as easy placement and removal of the spectacles on and from the nose, which further enhances reliability during use.

This invention refers to armless spectacles made from a sheet of material that includes at least a second folding line in stabilisation means. The invention proposes several methods of ensuring the second line and offering even greater rigidity. The spectacles can be converted from a non-functional state into a functional assembled state suitable for use by manipulating the configuration of at least one stabilising means in the bridge area. The spectacles have an enhanced rigidity thus increasing the overall stability of the spectacles during use. They can be presented basically flat for storage or transport and be easily manipulated to achieve the configuration for use. The spectacles may further present enhanced fastening and handling means that increase fastening stability as well as easy placement and removal of the spectacles on and from the nose, which further enhances reliability during use.

Glasses that are provided with biosensors for detecting signals and are in contact with the user's head are described, which glasses comprise a front frame (2) for supporting respective lenses (4), a pair of sides (6) articulated to the frame on laterally opposing sides, and a nasal-bearing device (8), each of the sides (6) extending in a longitudinal extension direction and comprising a side body (6a) extending into an end side portion (6b) in which a particular sensor (25) that makes contact with the head is integrated, and in which the end side portion (6b) comprises a pair of branches (26a, 26b), which extend from a common end (27), which is connected to the side body (6a), in the longitudinal extension direction of the side (6) in a manner spaced apart from one another, one (26a) of the branches being provided with an internal cavity (29) for housing a core (30) made of a conductive metal material and both the branches (26a, 26b) being made of a resiliently pliable and electrically conductive material.

Glasses that are provided with biosensors for detecting signals and are in contact with the user's head are described, which glasses comprise a front frame (2) for supporting respective lenses (4), a pair of sides (6) articulated to the frame on laterally opposing sides, and a nasal-bearing device (8), each of the sides (6) extending in a longitudinal extension direction and comprising a side body (6a) extending into an end side portion (6b) in which a particular sensor (25) that makes contact with the head is integrated, and in which the end side portion (6b) comprises a pair of branches (26a, 26b), which extend from a common end (27), which is connected to the side body (6a), in the longitudinal extension direction of the side (6) in a manner spaced apart from one another, one (26a) of the branches being provided with an internal cavity (29) for housing a core (30) made of a conductive metal material and both the branches (26a, 26b) being made of a resiliently pliable and electrically conductive material.

A method and device for determining an optical equipment adapted to a wearer and comprising an optical lens and a spectacle frame, the method including providing data relative to the wearer comprising optical requirements of the wearer, providing an optical cost function related to an optical function parameter of the optical lens and being defined based at least on part of the data relative to the wearer, providing a comfort cost function related to a comfort parameter, providing a mechanical interaction cost function that varies as a function of a geometrical parameter of spectacle frame and a geometrical parameter of optical lens, and determining an optical equipment that minimizes a global cost function, the global cost function being a weighted sum of all cost functions.

An eyeglass managing system determines process parameters for manufacturing at least part of an eyeglass including a lens and a frame. In this eyeglass managing system, an electronic system includes: —a receiving unit adapted to acquire lens data describing an initial lens and frame data describing an initial frame; —a processing unit adapted to identify, based on the lens data and on the frame data, modification parameters deriving from the interaction between the initial lens and the initial frame; and—a transmitting unit adapted to transmit a list of proposed modifications based on the identified modification parameters. The receiving unit is further adapted to acquire a response to at least one proposed modification; the processing unit is further adapted to determine, based on the acquired response, process parameters of an additive manufacturing process for manufacturing the lens or the frame.