Abstract: The present application relates to a method of manufacturing a polymeric cast substrate, the method comprising the steps of: providing a casting mold assembly containing two unsealed mold parts each having an inside surface and an outside surface, the inside surface of at least one of the unsealed mold parts comprising a composition comprising a UV absorbing agent; arranging the inside surfaces of the mold parts opposite to each other and closing the casting mold assembly so that the inside surfaces of both mold parts form together the molding cavity; filling a polymerizable composition in the molding cavity; curing the polymerizable composition in the mold assembly to obtain a polymeric cast substrate. The present application further relates to an optical article, preferably a lens, comprising a polymeric cast substrate manufactured according to this method, and also relates to an eyewear comprising such optical article.

Abstract: The present disclosure relates to a method for manufacturing a lens comprising the following steps: ?a. Providing a mass m anyi of at least one allyl monomer or allyl oligomer, ?b. Providing a radical initiator composition comprising benzoyl peroxide (BPO) in mixture with water, ?c. Mixing said at least one allyl monomer or allyl oligomer with the radical initiator composition to obtain a polymerizable composition, ?d. Stripping the water from the polymerizable composition to obtain a dried polymerizable composition, e. Providing a mold assembly and filling the mold assembly with the dried polymerizable composition, f. Curing the dried polymerizable composition in the mold assembly to obtain the lens. The invention also provides a polymerizable composition for the manufacture of a lens that is characterized by reduced yellowing.

Abstract: Disclosed is a polymerizable liquid composition for the manufacture of an optical article, including: a) at least one allyl monomer or allyl oligomer, b) at least one initiator for the polymerization of the allyl monomer or allyl oligomer, and c) at least one lake pigment including an organic ionic colorant and at least one compound including metal atoms having a charge opposite to that of the organic ionic colorant, d) wherein the lake pigment is not contained in nanoparticles, which are not the lake pigment itself, if the lake pigment is in the form of particles dispersed in the composition.

Abstract: A composite mold for manufacturing a thermoset optical article which is usable as an ophthalmic lens substrate and which comprises a microstructured main surface, to a method for manufacturing such a thermoset optical article, and to a method for obtaining the composite mold. The composite mold (1) comprises:·—a mineral first outer mold part (2) having a first inner surface (2a), and·—an organic molding film (4) detachably bonded to the first inner surface (2a) and having a microstructured pattern configured to directly form said microstructured main surface after casting the thermosetting material (6) in contact with the organic molding film (4). The organic molding film (4) is hydrophobic at least on said microstructured pattern, and has a thickness of between 10 nm and 5001-1m.

Abstract: The invention relates to a polymerizable composition intended to form a polymer composition for an optical material, such as a substrate of an ophthalmic lens, to this polymer composition obtained by polymerizing the polymerizable composition and having a refractive index of from 1.54 to 1.58, to an ophthalmic lens comprising this polymer composition and to a method for manufacturing this optical material. The polymerizable composition has a refractive index of from 1.54 to 1.58, the polymerizable composition comprising: —at least one non-aromatic polyisocyanate compound comprising at least two —NCO groups; —at least one non-aromatic polythiol compound comprising at least two —SH groups; —at least one polyol, According to the invention, said at least one polyol comprises a polyether polyol.

Abstract: An ophthalmic lens including a substrate-independent adhesive primer for joining a functional element to a lens substrate. In particular, the ophthalmic lens includes at least one polymerized lens substrate including at least one thermoset monomer, a functional component including at least one thermoplastic layer, a surface of the at least one thermoplastic layer facing the polymerized lens substrate, and a primer coating deposited onto the surface of the at least one thermoplastic film facing the polymerized lens substrate.

Abstract: The present invention relates to a method of fast curing a polythiourethane based transparent casted substrate. comprising in a preferred embodiment providing a first component A comprising a polythiourethane pre-polymer Al having isocyanate or isothiocyanate end groups. providing a second component B comprising a polythiourethane pre-polymer BI having thiol end groups. mixing together first and second components A and B and filling a molding cavity of a casting mold assembly with the resulting mixture. curing said mixture to obtain a transparent substrate, wherein at least one latent catalyst that is heat-activatable is added in the process prior to curing step 4). and said catalyst is subsequently activated to accelerate the polymerization reaction forming the polythiourethane based transparent substrate.

Abstract: Disclosed is a method for the manufacturing of an optical element having a refractive index above 1.59 by additive manufacturing to the optical element obtained by such a method and to an ophthalmic lens including such an optical element.

Abstract: The present invention relates to ophthalmic lenses comprising an oxazolone, a preparation method thereof and the use of an oxazolone in an ophthalmic lens to absorb blue light.

Abstract: Disclosed is a method for the manufacturing of an optical element having a refractive index above 1.59 by additive manufacturing to the optical element obtained by such a method and to an ophthalmic lens including such an optical element.

Abstract: A mold for manufacturing a thermoset optical article having a high refractive index, a method for manufacturing the mold, and a method for manufacturing the article. The mold (1) is configured for manufacturing a thermoset optical article capable of being a poly thiourethane-based lens substrate having a refractive index of from 1.54 to 1.74, by casting a thermosetting material (6) into a molding cavity (5) of the mold, the mold comprising a mineral first mold part (2) having a mineral first inner surface (2a) modified by an organosilane mold-release agent. The modified first inner surface (4) comprises a product of a dehydration-condensation reaction of a hydrolysate of an aqueous alcohol solution of the organosilane mold-release agent applied to the mineral first inner surface (2a) and cured thereon, and the modified first inner surface (4) is devoid of a coating layer of particles and is configured to be directly in contact with the cast thermosetting material.

Abstract: The present disclosure relates to ophthalmic lenses for correction of myopia. In particular, the present disclosure relates to an ophthalmic lens, comprising a first layer having microstructures on a first surface of the first layer, the microstructures on the first surface of the first layer being formed in a pattern, a material of the first layer being a thermoplastic material; and a second layer formed on the first surface of the first layer, wherein a glass transition temperature of the first layer is higher than a glass transition temperature of the second layer.

Abstract: The present invention relates to a cross-linkable composition comprising an epoxy oligomer comprising at least six hydroxy groups, to a coating obtained by curing the cross-linkable composition and to an optical lens comprising said coating on a surface thereof, in particular on the edge surface thereof. The invention also relates to a method of preparing a coating for an optical lens and to a method of coating a surface of an optical lens, in particular the edge surface of an optical lens.

Abstract: Disclosed are optical elements that contains two or more near infrared absorbers and methods of producing the same. Two near infrared absorbers with different near infrared wavelengths absorption ranges and residual colors are mixed with a precursor of an optical substrate. The resulting mixture is subsequently processed to produce optical elements that have a broad near infrared wavelength absorption range and a neutral residual color.

Abstract: Disclosed is a polymerizable liquid composition for the manufacture of an optical article, including: a) at least one allyl monomer or allyl oligomer, b) at least one initiator for the polymerization of the allyl monomer or allyl oligomer, and c) at least one lake pigment including an organic ionic colorant and at least one compound including metal atoms having a charge opposite to that of the organic ionic colorant, d) wherein the lake pigment is not contained in nanoparticles, which are not the lake pigment itself, if the lake pigment is in the form of particles dispersed in the composition.

Abstract: Disclosed is a method of manufacturing an ophthalmic lens having at least one optical function, including the determination of a transmission spectrum in a wavelength range from 280 to 2000 nm, the determination of a matrix including at least two compounds absorbing light having a wavelength from 280 to 2000 nm, with regard to the determined transmission spectrum, and additively manufacturing the matrix.

Abstract: The invention relates to nanoparticles of a composite material comprising a light absorbing agent dispersed in a matrix of a mineral oxide, to a method for the preparation of such nanoparticles, to the use of said method to modify the hue of nanoparticles of composite material comprising a light absorbing agent, and to an ophthalmic lens comprising such nanoparticles.

Abstract: A composite mold for manufacturing a thermoset optical article which is usable as an ophthalmic lens substrate and which comprises a microstructured main surface, to a method for manufacturing such a thermoset optical article, and to a method for obtaining the composite mold. The composite mold (1) comprises:·—a mineral first outer mold part (2) having a first inner surface (2a). and ·—an organic molding film (4) detachably bonded to the first inner surface (2a) and having a microstructured pattern configured to directly form said microstructured main surface after casting the thermosetting material (6) in contact with the organic molding film (4). The organic molding film (4) is hydrophobic at least on said microstructured pattern, and has a thickness of between 10 nm and 5001-1m.

Abstract: The invention relates to an optical article having a substrate made of an optical material comprising a polymer matrix and an improved light transmission in the visible range. The substrate comprises an external layer in which particles are embedded into the polymer matrix, the refractive index of the particles Rp being lower than the refractive index of the polymer matrix Rs.

Abstract: The present invention relates to an optical material cutting blue light, comprising at least one UV absorber that at least partially blocks light having a wavelength ranging from 400 to 450 nm, at least one absorbing dye A having its maximum absorption wavelength in the range from 520 nm to 640 nm, the optical material being made of a material chosen from polythiourethane materials, polyurethane urea materials, materials resulting from the polymerization or copolymerization of polyepisulfide monomers or oligomers, and materials resulting from the polymerization or copolymerization of allylic monomers or oligomers, the optical material having a colorimetric coefficient b* as defined in the CIE (1976) L*a*b* international colorimetric system that is lower than or equal to 6, and a hue angle h higher than or equal to 120° and lower than or equal to 180°, for an optical material thickness of 2 mm.