A lens comprises an internal cavity structure formed by dissolution of a soluble insert material. The internal soluble material may dissolve through a body of a lens such as a contact lens in order to form the cavity within the contact lens. The cavity within the lens can be shaped in many ways, and corresponds to the shape of the dissolved material, such that many internal cavity shapes can be readily fabricated within the contact lens. The insert can be placed in a mold with a pre-polymer material, and the pre-polymer material cured with the insert placed in the mold to form the lens body. The polymerized polymer may comprise a low expansion polymer in order to inhibit expansion of the lens when hydrated. The polymer may comprise a hydrogel when hydrated. The soft contact lens material comprises a sufficient amount of cross-linking to provide structure to the lens and shape the cavity.

A method for determining whether a sealing area (13) of a primary packaging container (1) for an ophthalmic lens is unacceptable for properly sealing a foil to the sealing area (13) comprises the steps of taking an infrared image (7) of the primary packaging container (1); determining in the infrared image (7) a plurality of individual pixels (700-709) which are arranged along an area (73) corresponding to the sealing area (13) of the primary packaging container (1); determining from the infrared image (7) the temperature (T.sub.0, T.sub.1, T.sub.2) of the individual pixels (700-709), and determining that the sealing area (13) is unacceptable in case the following conditions are fulfilled: a) the temperature (T.sub.1) of each individual pixel of a predetermined number of coherently arranged individual pixels (700, 703, 706) is lower than a reference temperature (T.sub.0), and b) the difference between the temperature (T.sub.1) of each individual pixel (700; 703; 706) of the coherently arranged pixels (700, 703, 706) and the reference temperature (T.sub.0) exceeds a predetermined threshold.

A contact lens package includes a first package layer, a second package layer, a lens receiving area defined between the first and second package layers, and first and second seal portions. The first seal portion extends around a first portion of the lens receiving area. The second seal portion extends around a second portion of the lens receiving area. The second seal portion has different sealing properties than the first seal portion. The first seal portion may include a releasable seal between the first and second package layers, and the second seal portion may include a permanent seal between the first and second package layers.

The invention relates to a pad printing instrument comprising an ink supply system capable of control the temperature, viscosity and colorant concentration of an ink in an ink cup. Such controls are achieved by continuously adding and mixing a cold ink having a composition identical to the ink in the ink cup but having a lower temperature. The continuous addition of a small amount of a cold ink into the ink cup could compensate heat generated by the friction between the ink cup and a clich and could minimize the evaporation of a diluent in the ink and change in the concentration of colorants in the ink and ink viscosity. The invention also relates to use of a pad printing instrument comprising an ink supply system of the invention for producing colored hydrogel or silicone hydrogel contact lenses.

An injection molded lens, to which the hot runner according to an embodiment of the present invention includes: a primary sprue; a primary runner which has a central portion connected to the primary sprue and an extension portion extending radially from the central portion; a secondary sprue of which one end is connected to the extension portion of the primary runner; a secondary runner which has a top thereof connected to the other end of the secondary sprue, has an annular shape and a thin plate shape, and has a plurality of protrusions formed on an outer circumference thereof; a plurality of gates which are connected to ends of the plurality of protrusions of the secondary runner; and a plurality of cavities connected to the plurality of gates. An injection molded lens, to which the hot runner according to another embodiment of the present invention includes: a primary sprue; a primary runner which has a central portion connected to the primary sprue and an extension portion extending radially from the central portion; a secondary sprue of which one end is connected to the extension portion of the primary runner; a secondary runner which has a top thereof connected to the other end of the secondary sprue, has a polygonal shape and a thin plate shape, and has a plurality of protrusions formed on an outer circumference thereof; a plurality of gates which are connected to ends of the plurality of protrusions of the secondary runner; and a plurality of cavities connected to the plurality of gates.

A lens comprises an internal cavity structure formed by dissolution of a soluble insert material. The internal soluble material may dissolve through a body of a lens such as a contact lens in order to form the cavity within the contact lens. The cavity within the lens can be shaped in many ways, and corresponds to the shape of the dissolved material, such that many internal cavity shapes can be readily fabricated within the contact lens. The insert can be placed in a mold with a pre-polymer material, and the pre-polymer material cured with the insert placed in the mold to form the lens body. The polymerized polymer may comprise a low expansion polymer in order to inhibit expansion of the lens when hydrated. The polymer may comprise a hydrogel when hydrated. The soft contact lens material comprises a sufficient amount of cross-linking to provide structure to the lens and shape the cavity.

A modular production line for the production of contact lenses comprises at least three separate modules: a manufacturing module (MM), an inspection module (IM), and a packaging module (PP). The modular production line further comprises fixedly arranged transfer interfaces between the individual modules (MM, IM, PP) for transferring the lenses from a preceding module to a subsequent module. The manufacturing module (MM) comprises a plurality of manufacturing stations (300, 301, 302, 310, 320, 321, 322, 330, 331, 340, 341, 342, 350, 351, 352) which are grouped to form a plurality of individual manufacturing units (30; 31; 32; 33; 34; 35) arranged in a closed loop. Reusable male and female molds (212, 112) are transported through the manufacturing stations of the manufacturing units, and each manufacturing unit (30; 31; 32; 33; 34; 35) comprises a plurality of the manufacturing stations (300, 301, 302, 310, 320, 321, 322, 330, 331, 340, 341, 342, 350, 351, 352). A plurality of transfer robots (36) is provided, each transfer robot (36) of the plurality of transfer robots (36) being arranged at a location between two manufacturing units (30; 31; 32; 33; 34; 35) to transfer the reusable molds from one manufacturing unit to the other manufacturing unit.

A method of producing an optical device from a volume of a curable composition, includes the following steps: polymerizing a first portion of the volume by irradiating an external surface of the volume with a light irradiation, thereby increasing a transmittance of the first portion for the light irradiation; polymerizing a second portion of the volume by irradiating the second portion with the light irradiation through the external surface and the polymerized first portion, wherein the light irradiation has a light intensity varying over the external surface between a first light intensity and a second light intensity distinct from the second light intensity. A corresponding system is also described.

The present specification provides a functional contact lens including: a lens substrate having a spherically curved surface so as to be worn on an eyeball; and a functional layer provided on at least one surface of the lens substrate and including a graphene sheet, and a method for manufacturing the same.

A machine for transferring a preformed functional film onto a curved face of an ophthalmic substrate, including: a first device for receiving and holding the substrate; a second device for receiving the film, the first device and/or second device configured to hold the film by applying a pressure force to the periphery thereof; a first mechanism for moving the devices, configured to place the curved face such that it faces the film, a second mechanism for moving the devices, configured to bring into contact the center of the film with the center of the curved face and to apply the film with the substrate to radially spread, from the center of the film up to the periphery thereof, a conformal contact between the film and the curved face; and a control and command unit configured to control at least the second mechanism when the film and the substrate are in contact.