A method for producing a molding mold for use in the production of a spectacle lens in which a minute protrusion is formed on one surface thereof includes preparing a master mold that has a base material and a coating portion coating the base material and having a surface formed into a shape corresponding to the shape of the one surface of the spectacle lens; cutting a recess corresponding to the protrusion into the surface of the coating portion; producing a transfer mold by performing electroforming on the coating portion in which the recess has been cut, the transfer mold having a surface that is complementary to the surface of the coating portion; and producing a first mold by performing electroforming on the surface of the transfer mold, the first mold having a surface that is complementary to the surface of the transfer mold.

A lens element adapted for a person including a holder including a refraction area having a refractive power based on a prescription for correcting an abnormal refraction of the person, a plurality of optical elements placed on at least one surface of the holder to at least one of: slow down, retard, or prevent a progress of the abnormal refraction of an eye of the person, and at least one layer of at least one coating element covering at least a zone of at least one optical element and at least a zone of the holder on which the optical elements are placed, wherein said at least one layer of at least one coating element adds an optical power of 0.1 diopter in absolute value in specific wearing conditions when measured over said zone of the optical element covered by said at least one layer of at least one coating element.

A pressure-sensitive adhesive tape for molding a plastic lens having a substrate and a pressure-sensitive adhesive layer formed on a surface of the substrate. The pressure-sensitive adhesive layer includes an acrylic copolymer having a functional group and a crosslinking agent capable of reacting with the functional group; the acrylic copolymer has a weight-average molecular weight (M.sub.w) of 1,100,000 or more and a molecular-weight polydispersity (M.sub.w/M.sub.n) of 10.0 or less; the pressure-sensitive adhesive layer has an elution percentage of 48.0% or less when immersed for two hours in toluene the temperature of which being adjusted to 80° C.; the pressure-sensitive adhesive tape exhibits a shift length of 0.15 mm or more and 0.50 mm or less after 800 minutes in a creep test; and the plastic lens has a refractive index of 1.59 or more.

A method for manufacturing an optical lens includes pressing a fluid-state optical material by using a solid-state optical material to inject the fluid-state optical material molten from the solid-state optical material into a cavity. The solid-state optical material is molten only at the part adjacent to the cavity to form the fluid-state optical material, which facilitates transport of the optical material and minimizes residual waste. The pressing force applied to the solid-state optical material can be controlled to hence control the moving rate of the solid-state optical material, thereby precisely controlling the injection volume and injection rate of the fluid-state optical material.

Apparatuses and methods for multistage molding of contact lenses containing low oxygen permeable components or oxygen impermeable components. Components may be embedded within a contact lens by forming a device on a polymer substrate, molding a spacer onto a male mold, bonding the device to the spacer, removing the polymer substrate, and molding the remainder of the contact lens.

A method of producing a lens with an embedded foil, comprising the steps of positioning a foil (10) on a foil fixation holder, providing adhesive attachment dots (41) on the foil (10) on surface portions (12) opposite to the foil fixation holder, positioning the front mould (30) ensuring the contact of the attachment dots (41) with a surface (31) of the front mould (30), retracting the foil fixation holder and positioning a back mould (120) opposite to the front mould (30). Then the front mould (30) and the rear mould (120) are connected with a sealing bridging element (90) to build an assembly in order to form a mould cavity (45, 155) with a pouring opening, wherein the edge (11) of the foil (10) is spaced apart (112) from the bridging element (90) and the assembly comprises passages between the attachment dots (141), the foil (10) and the front mould backside (31) allowing pouring a monomer into the entire mould cavity (45, 155) before curing the monomer and decomposing the assembly as well as cutting the lens with the embedded foil from the polymer block.

Provided is a technique by which it is possible to reduce the thickness of a polarized lens for spectacles that has a rotationally symmetric aspherical surface formed on an object-side surface thereof, in the same manner as for a normal lens. Provided is a polarized lens for spectacles, including: a first lens substrate having an object-side surface on which a convex surface that is a rotationally symmetric aspherical surface is formed; a second lens substrate having an eyeball-side surface; and a polarized film disposed between the first lens substrate and the second lens substrate and having a convex shape toward the object-side surface, wherein an in-plane distribution of a distance W between the object-side surface and the polarized film has concentricity.

A molding device for casting an optical article with a thermoset resin the optical article defining two opposed main surfaces, one of which being formed by an optical functional wafer, the molding device comprising:—a. a molding element (2) forming a rear or a front part of a casting mold—b. a gasket (3) intended to surround the molding element—c. an initially curved wafer (4) defining a predetermined curvature depending on one of the two main surfaces of the optical article to be molded—d. a closing element (6) defining in a closing position in which the peripheral part of the wafer on the gasket is pinched, a pouring space between the molding element, the gasket and the wafer—e. spacing means (9) interposed between the wafer and the molding element to define an internal volume between the wafer and the closing element, the spacing means, wafer and closing element being configured to form a set hermetic to the resin to be poured into the molding device the closing member occupies a closing position.

A spectacle lens manufacturing system includes resin material filling means which fills a lens mold with a lens material (heat-curable resin material), and at least a portion of the lens mold is formed by a three-dimensional printer. The lens mold includes a front lens mold having a rear surface that defines a front surface of a spectacle lens, a rear lens mold having a front surface that defines a rear surface of the spectacle lens, and a side peripheral lens mold having an inner surface that defines a side periphery of the spectacle lens. The side peripheral lens mold is formed by the three-dimensional printer.

A lens-mold producing method includes a position and posture determining step of specifying positions and postures, in space coordinates, of a first mold having a molding surface for forming one optical surface of a lens and a second mold having a molding surface for forming the other optical surface, a mold holding step of rotating and/or inclining, based on the positions and postures in the space coordinates, at least one of the first and second mold, maintaining a rotation angle and/or an inclination angle of a reference plane of the first mold with respect to a reference plane of the second mold, and holding the first and second mold, and an assembling step of arranging the molding surfaces of the first and second mold so as to face each other, fixing outer peripheries of the first mold and the second mold, and assembling a lens mold.