A method to make dyed functional film comprising the steps of providing a soluble polymer material; adding an appropriate solvent to the polymer material to make a soluble polymer solution; providing a soluble dye; adding an appropriate solvent to the dye to make a soluble dye solution; adding the dye solution to the polymer or PVA solution, and introducing the dyed polymer or PVA solution to a solution casting device; removing a thin dyed functional film from the casting device; and letting the dyed functional film dry and solidified.

A device and method of making the device is described. In some implementations, an eyeglass lens is colored so that it is semi-opaque or opaque and approximates the color of a particular user's skin. In an example, the lens can be colored by placing an adhesive material on the front or rear surface of the lens. In an additional or alternative example, the lens can be colored by dyeing the lens material. In an additional or alternative example, the lens can be colored by painting the lens material. The colored lens blocks the view of passersby of the ocular region of the wearer and is itself inconspicuous because the approximate skin color camouflages its presence.

A method of applying a contact lens to an eye of a subject can include: applying an ophthalmic composition to the contact lens, wherein the ophthalmic composition includes a colorant that temporarily colorizes the contact lens; and positioning the colorized contact lens onto a correct position of the eye while visualizing the colorized contact lens. A method of removing a contact lens from an eye of a subject can include: applying an ophthalmic composition to the contact lens while located on the eye of the subject, wherein the ophthalmic composition includes a colorant that temporarily colorizes the contact lens; and removing the colorized contact lens from the eye while visualizing the colorized contact lens.

Methods for tinting or decoloring a lens include inserting a lens into a reception unit of a lens holder, providing an immersion bath containing a fluid, immersing the lens holder into the fluid; and rotating the lens holder around a rotation axis to a predetermined maximum rotation angle, wherein the rotation axis is located outside the lens and generally perpendicular to a plane of the lens. A lens obtainable by such methods, a lens having a tint or a decolorization, a lens holder, and a tinting device allowing for more complex (gradient) tints are also disclosed. The present disclosure further relates to a corresponding computer program.

A method of preparing and using a contact lens is disclosed. In one step, a light-absorbing dye solution, comprising a light-absorbing dye disposed in a solution, is dispensed onto a contact lens. In another step, the light-absorbing dye is reacted with the contact lens so that the contact lens permanently contains the light-absorbing dye. The transmission of light of a certain wavelength through the contact lens is reduced due to the reacted light-absorbing dye permanently contained within the contact lens.

There is provided a polarizer excellent in heat resistance. A polarizer according to an embodiment of the present invention includes a resin film containing iodine, wherein an end portion of the resin film has formed therein a high-concentration portion having a concentration of a substance that forms a counter ion of iodine higher than that of another portion.

Methods for tinting or decoloring a lens include inserting a lens into a reception unit of a lens holder, providing an immersion bath containing a fluid, immersing the lens holder into the fluid; and rotating the lens holder around a rotation axis to a predetermined maximum rotation angle, wherein the rotation axis is located outside the lens and generally perpendicular to a plane of the lens. A lens obtainable by such methods, a lens having a tint or a decolorization, a lens holder, and a tinting device allowing for more complex (gradient) tints are also disclosed. The present disclosure further relates to a corresponding computer program.

An ophthalmic contact lens configured to treat color vision deficiency is presented herein. The contact lens includes a tinted region containing either or both of a first dye that is configured to absorb at least 50% of incident light in a spectral band between 480 nanometers to 500 nanometers and a second dye that is configured to absorb at least 50% of incident light in a spectral band between 550 nanometers to 580 nanometers. A method of manufacturing such a contact lens and a process of forming an ophthalmic contact lens by an additive manufacturing process is also presented.

There is provided a polarizer excellent in heat resistance. A polarizer according to an embodiment of the present invention includes a resin film containing iodine, wherein an end portion of the resin film has formed therein a high-concentration portion having a concentration of a substance that forms a counter ion of iodine higher than that of another portion.

A method for tinting glass lenses, comprising the immersion of a glass lens in a bath comprising at least one salt constituted by a cation selected from the group constituted by a transition metal, a metal of the p block of the periodic table, a rare earth metal, and by an anion selected from the group constituted by a halide, a sulfate, a nitrate; the tinting salt is mixed with another salt constituted by a cation selected from the group constituted by an alkaline metal, an alkaline earth metal, and by an anion selected from the group constituted by a halide, a sulfate, a nitrate.