Abstract: An optical article including one or more photochromic compounds selected from group consisting of compound represented by general formula 1 and compound represented by general formula 2. In general formula 1, R1 to R8, and B1 and B2 each represent hydrogen atom or substituent, and at least either of B1 and B2 represents monovalent group represented by general formula 3; in general formula 2, R9 to R16, and B3 and B4 each represent hydrogen atom or substituent, and at least either of B3 and B4 represents monovalent group represented by general formula 3; and in general formula 3, Ar1 represents aryl group or heteroaryl group, R18 represents hydrogen atom or substituent, Ar1 and R18 may be coupled to form ring structure via single bond or divalent linking group, and * represents bonding position to adjacent carbon atom.

Abstract: A spectacle lens can inhibit ametropia of the eyes and ensure full visibility. The spectacle lens comprises: first refraction areas and second refraction areas. Each first refraction area has a first refraction force that may be based on a prescription for correcting the ametropia of the eyes. Each second refraction area has a refraction force different from the first refraction force and may function to focus images on the positions except the retina of the eyes, to inhibit the development of the ametropia. Near the central part of the lens, the second refraction areas form a plurality of independent island-shaped areas, and the first refraction areas form the areas beyond the areas of the second refraction areas.

Abstract: The photochromic compound is represented by General Formula 1 . R30 and R31 each independently represent a linear or branched alkyl group having 2 or more carbon atoms, which is unsubstituted or has one or more substituents; a cyclic alkyl group having 3 or more carbon atoms which is unsubstituted or has one or more substituents; or represents a group represented by - (R100) nR101 which is unsubstituted or has one or more substituents, R100 represents an alkyleneoxy group, R101 represents an alkyl group, n represents an integer of 1 or more, a total number of carbon atoms of n alkyleneoxy groups represented by R100 and alkyl groups represented by R101 is 2 or more, R32 to R35 each independently represent a hydrogen atom or a substituent other than an electron-attracting group, and R36, R37, B7 and B8 each independently represent a hydrogen atom or a substituent.

Abstract: Provided are a spectacle lens and a technique associated therewith, wherein, when ? is a wavelength, r is a ratio of a total area of defocus regions to an overall area in plan view of a portion in which a plurality of defocus regions are provided in the spectacle lens, w is an amount of progression of a wavefront in each of the defocus regions relative to a base region, an average value of cos(2?w/?) in one defocus region is obtained in each of the plurality of defocus regions, c(?) is a gross average of the plurality of average values, an average value of sin(2?w/?) in one defocus region is obtained in each of the plurality of defocus regions, s(?) is a gross average of the plurality of average values, and f(?) is equal to{1-r+r·c(?)}2 + {s(?)}2, a sign of {f(?×1.01)-f(?)} is inverted at least once when the wavelength ? is increased within a range of 0.45 µm ? ? ? 0.65 µm.

Abstract: Provided is a photochromic compound represented by the following General Formula 1. In General Formula 1, Az represents a monovalent azine ring group which is unsubstituted or has a substituent, L represents a divalent or higher linking group, D represents a photochromic dye structure, a and c each independently represent an integer of 1 or more, b represents 0 or an integer of 1 or more; and when there are a plurality of Az's in General Formula 1, the plurality of Az's may be the same as or different from each other, and when there are a plurality of L's in General Formula 1, the plurality of L's may be the same as or different from each other.

Abstract: A method for producing a spectacle lens from a lens material and includes: a marking step of marking an identification mark for identifying the spectacle lens, and a processing information mark which is used to process a lens blank and includes a tray identification 2D code, a tray identification code, a shape line and a position mark by forming a hole or a groove in a convex surface of the lens material by laser; and a concave surface machining processing step of reading the processing information mark, and machining a concave surface of the lens blank based on the read processing information mark.

Abstract: The present invention relates to [1] a polymerizable composition for optical member containing a polymerizable component and a urethaneurea compound having a structural unit derived from tolylene diisocyanate in an amount of 0.1 to 10 parts by mass based on 100 parts by mass of a total amount of the polymerizable component; [2] a production method of an optical member, including a step of injecting the polymerizable composition of [1] into a molding die, and a step of polymerizing the polymerizable composition; and [3] a spectacle lens including a spectacle lens substrate obtained by the production method of [2].

Abstract: A technology for inhibition of myopia progression adapted to the RPR of the wearer is provided. A spectacle lens and related technology are provided that include a base area that causes a beam that enters through an object-side surface to exit through an eye-side surface and converge on a retina via the eye, and a plurality of defocus areas that each contact the base area and have a characteristic whereby a beam that passes through at least a portion of the defocus area is incident on the retina as a diverging ray, and, in not less than half of the plurality of defocus areas, at least one of a defocus power and a size of each defocus area is set, so as to compensate for a change in retinal spot size due to relative peripheral refraction (RPR) that depends on an eccentricity angle of the eye of the wearer.

Abstract: A spectacle lens can inhibit ametropia of the eyes and ensure full visibility. The spectacle lens comprises: first refraction areas and second refraction areas. Each first refraction area has a first refraction force that may be based on a prescription for correcting the ametropia of the eyes. Each second refraction area has a refraction force different from the first refraction force and may function to focus images on the positions except the retina of the eyes, to inhibit the development of the ametropia. Near the central part of the lens, the second refraction areas form a plurality of independent island-shaped areas, and the first refraction areas form the areas beyond the areas of the second refraction areas.

Abstract: The present invention is a method for producing a spectacle lens from a lens material, and includes: a marking step (step S10) of marking an identification mark for identifying the spectacle lens, and a processing information mark which is used to process a lens blank and includes a tray identification 2D code, a tray identification code, a shape line and a position mark by forming a hole or a groove in a convex surface of the lens material by laser; and a concave surface machining processing step (step S13) of reading the processing information mark, and machining a concave surface of the lens blank based on the read processing information mark.

Abstract: An optical article, such as a spectacle lens, includes, on a substrate, a photochromic layer containing a photochromic dye and a resin component, and a protective film. The indentation hardness of the photochromic layer in the thickness direction is less than or equal to the indentation hardness of the surface of the substrate. The result of multiplying the indentation hardness of the protective film in the thickness direction and the thickness of the protective film is five-hundredths or more times and one or less times the result of multiplying the indentation hardness of the photochromic layer in the thickness direction and the thickness of the photochromic layer.

Abstract: The photochromic composition contains one or more compounds represented by General Formula A, one or more compounds represented by General Formula B, and one or more compounds represented by General Formula C is provided. In General Formula A, R1 to R6, B1, and B2 each independently represent a hydrogen atom or a substituent. In General Formula B, R7 to R12, B3, and B4 each independently represent a hydrogen atom or a substituent, and R13 and R14 each independently represent an electron-donating group. In General Formula C, R15 to R20, B5, and B6 each independently represent a hydrogen atom or a substituent, and one of R21 and R22 represents a hydrogen atom and the other represents an electron-donating group.

Abstract: The present invention provides an eyeglass lens and its related techniques, the eyeglass lens including: a base region that causes a luminous flux that has entered from an object-side face to exit from an eyeball-side face, and to enter an eye and converge on a retina; and a plurality of defocus regions that are in contact with the base region and that are each configured such that a luminous flux that passes through at least a part of the corresponding defocus region enters the retina as diverging light, in which a defocus spot angle (DSA) of the luminous flux that causes a light spot having a size mainly for cones is set in a defocus region located near the center of the eyeglass lens, and a defocus spot angle (DSA) of the luminous flux that causes a light spot having a size mainly for rods is set in a defocus region located near the periphery of the eyeglass lens.

Abstract: A pair of progressive power lenses and related techniques thereof are provided, wherein a power distribution on a horizontal cross-section of the right eye lens has a peak at a position that is away from a main gaze line, and a power distribution on a horizontal cross-section of the left eye lens has a peak at a position that is away from a main gaze line in a direction opposite to that of the right eye lens.

Abstract: One embodiment according to the present disclosure relates to a spectacle lens containing a compound in which the transmittance of light with a wavelength of 410 nm is 5% or less and the transmittance of light with a wavelength of 430 nm is 70% or more under the following transmittance measurement conditions. transmittance measurement conditions: for a sample containing a standard resin from curing 50.28 parts by mass of a mixture of 2,5-bis(isocyanatomethyl)-bicyclo[2.2.1]heptane and 2,6-bis(isocyanatomethyl)-bicyclo[2.2.1]heptane and a mixture of 25.50 parts by mass of pentaerythritol tetrakis(3-mercaptopropionate) and 24.22 parts by mass of 1,2-bis(2-mercaptoethylthio)-3-mercaptopropane and 0.55 parts by mass of the above compound with respect to 100 parts by mass of the standard resin, the sample having a thickness of 1.6 mm at the measurement point, the transmittance of light with a wavelength of 410 nm and 430 nm is measured with a spectrophotometer.

Abstract: An eyeglasses lens evaluation device includes a fixation point setting part to set a fixation point on an evaluation target space and set a line of sight passing position on eyeglasses lenses when a wearer wears the eyeglasses lenses and looks at the fixation point, an apparent position calculating part to calculate an apparent position of each of a plurality of evaluation points set on the evaluation target space in a state where the wearer wears the eyeglasses lenses and fixates the wearer's eyes on the fixation point via the line of sight passing positions, a difference calculating part to calculate, for each of the plurality of evaluation points, a difference between the apparent position and a reference position, and an evaluation index calculating part to calculate an evaluation index by taking statics of the difference for each of the plurality of evaluation points calculated by difference calculating part.

Abstract: Provided is an eyeglass lens including: a first region formed such that light transmitted therethrough is focused at a predetermined position in an eye; and a plurality of second regions formed such that light transmitted therethrough is focused at a position defocused from the predetermined position, wherein the plurality of second regions have negative spherical aberration.

Abstract: An amount obtained by multiplying a vector amount obtained by Fourier transform of a wavefront of a spectacle lens by a preset predetermined vector amount is adopted as an evaluation index of the spectacle lens, and the evaluation index is evaluated based on the evaluation index.

Abstract: The present invention provides an eyeglass lens and its related techniques, the eyeglass lens including: a base region that causes a light flux that has entered from an object-side face to exit from an eyeball-side face, and to enter an eye and converge at a position A on a retina; and a plurality of defocus regions that are in contact with the base region, wherein the defocus regions each include a first portion and a second portion, a refractive power of the first portion is within ±0.12 D of the refractive power of the base region, and a light flux that passes through the second portion of the defocus region is incident on the position A as diverging light.

Abstract: A progressive power lens and a technique associated therewith, wherein CF and AxF are achieved in a distance portion and CN and AxN are achieved in a near portion in a state in which: a basic progressive surface on which no astigmatic power is set in the distance portion, the near portion, and an intermediate portion; a curvature distribution of a set ? (k1?, k2?) of two principal curvatures having different sizes that is uniformly added to the distance portion, the near portion, and the intermediate portion, and that achieves CF and AxF in the distance portion; and a curvature distribution of a set ? (k1?, k2?) of two principal curvatures having different sizes that is different from the curvature distribution of the set ?, and in which an absolute value (lk1?-k2?l) of a principal curvature difference increases in a predetermined direction, are combined.