A functional dyed lens for spectacles is obtained by dyeing at least one of the surfaces of an undyed plastic lens, and in the functional dyed lens, a dyeing density defined as a difference in luminous transmittance from the undyed plastic lens is 2% or more but 4% or less, and a difference in average transmittance from the undyed plastic lens in a wavelength region of 530 nm to 570 nm is 3% or more but 5% or less.

The method of manufacturing of this invention is capable of providing an eyeglass lens free from uneven coloring or peeling of a colored layer having a gradation pattern.

Designs, apparatus and methods to form contact lenses with aesthetic elements on demand are described. In some examples, the method of defining the aesthetic aspect includes printing patterns. Other examples include photochromic or thermochromic elements which may provide patterning on exposure to electromagnetic irradiation. In some further examples, energized components in contact lenses may provide aesthetic characteristics.

A dyeing device dyes a resin body by vaporizing and depositing a sublimation dye adhered to a dyeing base to a resin body and fixing the dye to the resin body. The dyeing device lowers the pressure inside a closed chamber that closes the periphery of the resin body by a pump. In the state where the adhesion surface of the dyeing base to which the dye is adhered faces the resin body without contact, by heating the dye adhered to the dyeing base inside the closed chamber of which the pressure is lowered, the dye is sublimated, vaporized, and deposited on the resin body. The pressure inside the closed chamber is raised higher than the pressure at the vaporizing and depositing time. By irradiating the resin body on which the dye is vaporized and deposited with electromagnetic wave, the resin body is heated and the dye is and fixed.

Described herein is a cost-effective and time-efficient method for making contact lenses having a hydrophilic surface and a reduced uptake of cationic compounds, e.g. from care solutions. The method is based on conducting one of the process steps in the presence of an amino-C2-4-alkyl (meth) acrylamide or an C1-4 alkyl-amino-C2-4-alkyl (meth) acrylamide.

A method for manufacturing a dye-attached substrate provided with a dye section that includes a sublimable dye to be deposited on a resin body includes a printing step of printing a plurality of units of the dye sections, the dye section for dyeing one resin body or one set of resin bodies constituting one unit, lined up in a longitudinal direction of a long thin substrate, by discharging ink that includes the sublimable dye on the substrate using a printing device, a piece creating step of creating a piece of the substrate that includes the plurality of units of the dye sections, by cutting the substrate on which the dye section is printed, and a drying step of drying the ink of the plurality of units of the dye sections included in the piece of the substrate.

A colored hard contact lens printing method for printing an iris design on the whole surface of a hard contact lens, the method includes: a preparation step of preparing a hard contact lens, a centering jig, and a composition for printing so as to print an iris design on the hard contact lens; a printing step of mounting the hard contact lens on the centering jig and printing the iris design by using the composition for printing; and a post-treatment step of post-treating the hard contact lens having the iris design printed thereon. Therefore, the present invention prints iris designs of various colors and patterns on the outer circumference of the front surface of the hard contact lens by using the composition for printing, thereby providing an effect of manufacturing a colored hard contact lens having iris designs of various colors and patterns on the front surface thereof.

The invention is related to a method for producing silicone hydrogel contact lenses with a stable lubricious hydrogel coating thereon providing a low surface friction. A method of the invention comprises forming a plasma-reactive hydrophilic polymer hybrid base coating having reactive functional groups on a silicone hydrogel contact lens and heating the silicone hydrogel contact lens with the hybrid base coating in an aqueous solution of a water-soluble and thermally crosslinkable hydrophilic polymeric material to form a stable lubricious hydrogel coating thereon.

A polarized ophthalmic lens has a polarization gradient with a primary light transmission gradient. The lens also includes a secondary light transmission gradient, the secondary light transmission gradient being complementary to the primary light transmission gradient such that the lens exhibits uniform light transmission.

A method of forming an ophthalmic contact lens using an additive manufacturing apparatus is presented herein. The method providing a first solution comprising HEMA, PEGDA, and a photoinitiator, forming a support structure on a planar print bed of the additive manufacturing apparatus by depositing a first plurality of layers of the first solution and curing the first plurality of layers, and forming an ophthalmic contact lens on the support structure by depositing a second plurality of layers of the first solution and curing the second plurality of layers. The second plurality of layers are arranged such that a disc of the ophthalmic contact lens is oriented generally perpendicular to the planar print bed of the additive manufacturing apparatus.