Abstract: A vision simulation, on assumption that spectacles are worn, is performed for a first model designed by setting a target additional power of a desirable value at a position corresponding to a fitting point on a principal meridian. A correction amount is computed for correcting the difference between a simulation value obtained for the additional power at the position corresponding to the fitting point on the principal meridian through the vision simulation and the target additional power. A second model is designed by replacing the additional power with a value obtained by the addition of the calculated correction amount to the target additional power.

Abstract: A technology concerning a pair of spectacle lenses for binocular vision. In each of the pair of spectacle lenses for binocular vision, when an inner horizontal direction of each of the spectacle lenses is a direction toward the nose of a user who wears the spectacle lenses, and an outer horizontal direction of the spectacle lenses is a direction toward an ear of the user, a portion for viewing an object at finite distance is provided in each of the pair of spectacle lenses for binocular vision and a shape of a base in prism is formed in the position such that a line of sight of a user viewing an object through the portion is directed to a direction that is different from a direction from the object.

Abstract: A pair of spectacle lenses for binocular vision. In each of the pair of spectacle lenses for binocular vision, when an inner horizontal direction of each of the spectacle lenses is a direction toward the nose of a user who wears the spectacle lenses, and an outer horizontal direction of each of the spectacle lenses is a direction toward an ear of the user, a portion for viewing an object at finite distance is provided and a shape of a base out prism is formed in the position such that a line of sight of a user viewing an object through the portion is directed to a direction that is different from a direction from the object.

Abstract: A technology concerns a spectacle lens to suppress unnecessary convergence. In the spectacle lens, when an inner horizontal direction of the spectacle lens is a direction toward the nose of a user who wears the spectacle lens, and an outer horizontal direction of the spectacle lens is a direction toward an ear of the user, a shape of a base in prism is formed in a portion in which power continuously changes and through which a main line of sight, influenced by convergence of the user of the spectacle lens, passes such that at least a part of a base out prism, which may be generated in the portion, is cancelled.

Abstract: There is provided a progressive addition lens for spectacles including a distance portion and a near portion having different powers, wherein an equivalent spherical power of the distance portion is plus; and a first lens and a second lens having different addition powers from each other, and a difference between vertical surface power in the distance portion and vertical surface power in the near portion on an object-side surface of the first lens, and a difference between vertical surface power in the distance portion and vertical surface power in the near portion on an object-side surface of the second lens are the same.

Abstract: Progressive addition lens includes a near portion having a power for viewing a near field, a distance portion having a power for viewing a distance field further than the near field, and an intermediate portion connecting the distance portion and the near portion. The progressive addition lens includes an aspherical object-side surface and an aspherical eyeball-side surface and is formed in rotational symmetry with respect to a center of design of the progressive addition lens. The object-side surface includes a first stable region formed in rotational symmetry with respect to the center of design and including the center of design, and an aspherical region arranged outside of the first stable region to contact the first stable region and formed in rotational symmetry with respect to the center of design. A Peak to Valley value of a mean surface refractive power in the first stable region is 0.12 D or less.

Abstract: A progressive addition lens includes a portion having a power for viewing a near field, a portion having a power for viewing a distance field further than the near field, and an portion connecting the distance portion and the near portion. The progressive addition lens includes an aspherical object-side surface and an aspherical eyeball-side surface and is formed in rotational symmetry with respect to a center of design of the progressive addition lens. The object-side surface includes a first stable region formed in rotational symmetry with respect to the center of design and including the center of design, and an aspherical region arranged outside of the first stable region to contact the first stable region and formed in rotational symmetry with respect to the center of design. A PV value (Peak to Valley) of a mean surface refractive power in the first stable region is 0.12 D or less.

Abstract: A progressive-lens designing system includes a manufacturer-side terminal installed in a lens manufacturer connected to a shop-side terminal installed in a spectacle shop or any other location via a network. The manufacturer-side terminal includes an optimization coefficient setting section that uses a variety of data received from the shop-side terminal to set an optimization coefficient for each target object in specific work, a dioptric power computing section that computes target dioptric power for each target object, a lens designing section that performs lens design, and an order processing section that performs order processing when receiving an order placed from the shop-side terminal.

Abstract: There is provided a progressive addition lens for spectacles including a distance portion and a near portion having different powers, wherein an equivalent spherical power of the distance portion is plus; and a first lens and a second lens having different addition powers from each other, and a difference between vertical surface power in the distance portion and vertical surface power in the near portion on an object-side surface of the first lens, and a difference between vertical surface power in the distance portion and vertical surface power in the near portion on an object-side surface of the second lens are the same.

Abstract: A progressive-power lens has one surface which satisfies the following expressions CY(DP)=CT(DP) CY(P)>CT(P) where CT(DP) denotes a vertical direction curvature at the distance reference point, CY(DP) denotes a horizontal direction curvature, CY(P) denotes a horizontal direction curvature at a point on the principal meridian which is located further on the near portion than the progressive start point, and CT(P) denotes a vertical direction curvature at the point.

Abstract: Spectacle lenses that allow a wearer to view an object in a more comfortable manner include a pair of lenses for the left and right eyes. The power of one of the pair of lenses is shifted toward the positive side with respect to the power of the other lens, and object-side average surface power (base curve) of the one lens is smaller than object-side average surface power (base curve) of the other lens. The power (dioptric power) is principal meridian power along a principal meridian of each of the lenses, and the base curve is in the direction along the principal meridian.

Abstract: A progressive power lens including a distance portion for visual recognition of a far working distance, a near portion for visual recognition of a near working distance, and an intermediate portion provided between the distance portion and the near portion, the intermediate portion including a position of an amount of intermediate inset in which a visual line when the intermediate working distance is visually recognized passes an eyeball side surface of the progressive power lens, and addition at intermediate position for viewing an intermediate working distance smaller than the far working distance and larger than the near working distance being set to the position of the amount of intermediate inset.

Abstract: A progressive-power lens has one surface which satisifies the following expressions CY(DP)=CT(DP) CY(P)>CT(P) where CT(DP) denotes a vertical direction curvature at the distance reference point, CY(DP) denotes a horizontal direction curvature, CY(P) denotes a horizontal direction curvature at a point on the principal meridian which is located further on the near portion than the progressive start point, and CT(P) denotes a vertical direction curvature at the point.

Abstract: A progressive-power lens has one surface which satisfies the following expressions CY(DP)=CT(DP) CY(P)<CT(P) where CT(DP) denotes a vertical direction curvature at the distance reference point, CY(DP) denotes a horizontal direction curvature, CY(P) denotes a horizontal direction curvature at a point on the principal meridian which is located further on the near portion than the progressive start point, and CT(P) denotes a vertical direction curvature at the point.

Abstract: A progressive power lens including a distance portion for visual recognition of a far working distance, a near portion for visual recognition of a near working distance, and an intermediate portion provided between the distance portion and the near portion, the intermediate portion including a position of an amount of intermediate inset in which a visual line when the intermediate working distance is visually recognized passes an eyeball side surface of the progressive power lens, and addition at intermediate position for viewing an intermediate working distance smaller than the far working distance and larger than the near working distance being set to the position of the amount of intermediate inset.

Abstract: Spectacle lenses that allow a wearer to view an object in a more comfortable manner include a pair of lenses for the left and right eyes. The power of one of the pair of lenses is shifted toward the positive side with respect to the power of the other lens, and object-side average surface power (base curve) of the one lens is smaller than object-side average surface power (base curve) of the other lens. The power (dioptric power) is principal meridian power along a principal meridian of each of the lenses, and the base curve is in the direction along the principal meridian.

Abstract: A lens order system, includes: a server unit, including: a data recognizer that recognizes lens design detail data relating to design details of a lens; an image storage that stores object image data relating to an image of an object; an image recognizer that recognizes the object image data based on the lens design detail data; and an order reception section that recognizes order data relating to an order for a designed lens and generates order reception data, and a terminal unit connected with the server unit in a data transmittable manner, the terminal unit including: a data acquiring section that acquires the lens design detail data; a lens design section that designs the lens based on the lens design detail data; an image processor that superposes lens image data relating to an image of the designed lens designed by the lens design section on the object image data sent from the server unit and generates processed image data in which a superposing portion of the object image data and the lens image data i

Abstract: A lens order system, includes: a server unit including: a data recognizer that recognizes lens design detail data on setting details of a lens; an image data recognizer that recognizes image data on an image; a lens design section that designs the lens based on the lens design detail data; an image processor that creates processed image data in which lens image data on an image of the designed lens is superposed on the image data and a superposing portion of the image data and the lens image data is image-processed to show a vision of the image data through the designed lens; and an order reception section that recognizes order data on an order of the designed lens and generates order reception data; and a terminal unit connected with the server unit in a data transmittable manner, the terminal unit including: a data acquiring section that acquires the lens design detail data; a display controller that recognizes and displays on a display the processed image data sent from the server unit; and an order sectio

Abstract: A progressive-lens designing system includes a manufacturer-side terminal installed in a lens manufacturer connected to a shop-side terminal installed in a spectacle shop or any other location via a network. The manufacturer-side terminal includes an optimization coefficient setting section that uses a variety of data received from the shop-side terminal to set an optimization coefficient for each target object in specific work, a dioptric power computing section that computes target dioptric power for each target object, a lens designing section that performs lens design, and an order processing section that performs order processing when receiving an order placed from the shop-side terminal.

Abstract: A progressive power lens that prevents degradation in optical characteristics invited by deviation of a pantoscopic angle from the standard value. The lens includes an outer refractive surface and an inner refractive surface, at least one of which is a progressive surface. Because the amount and direction of aberrations generated in distance and near portions are different, correction is given to either or both of the surface powers of the outer and inner surfaces of the lens such that the distance and near portions are differently corrected.