Abstract: A method for designing an eyeglass lens includes an eyeball model construction step of determining a value of a parameter of each of a plurality of optical elements, and constructing an eyeball model, an aberration acquisition step of making a light ray incident at a predetermined angle with respect to a visual axis of the eyeball model to obtain an off-axis aberration in a paracentral portion and a peripheral portion of a retina of the eyeball model by an optical simulation, an aspherical coefficient value calculation step of disposing an eyeglass lens on a front side of the eyeball model and performing the optical simulation to obtain an aspherical coefficient value acting in a direction of reducing the off-axis aberration, and an aspherical shape determination step of determining an aspherical shape of the eyeglass lens based on the aspherical coefficient value.

Abstract: A wavelength swept light source includes a sawtooth waveform as a main waveform and an exponential component of the sawtooth waveform to the controlled voltage of the electro-optic deflector. The controlled voltage is controlled so that, as an oscillation wavelength to be swept is swept towards a longer wavelength side, a change rate of the oscillation wavelength is increased.

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: There is provided a data server capable of improving a quality of a spectacle lens as a finished product and reducing a cost, even if a semi-finished lens having a complicated shape is used, the data server including: a specification data acquisition unit configured to acquire specification data of a semi-finished lens transmitted from a first terminal; a specification data storage unit configured to store the specification data acquired by the specification data acquisition unit; and a specification data output unit configured to output the specification data stored in the specification data storage unit, to a second terminal.

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 includes an eyeball-side surface including a distance portion and a near portion having different values of dioptric power. An intermediate portion connects the distance portion and the near portion to each other. An object-side surface of the progressive-power lens includes a first region extending along a principal meridian and having a spherical shape having first curvature, a second region facing the distance portion and having a spherical shape having second curvature equal to the first curvature, and a third region located outside the first region and below the second region and having third curvature greater than the first curvature.

Abstract: A progressive-power lens having an eyeball-side surface including a distance portion and a near portion having different values of dioptric power and an intermediate portion that connects the distance portion and the near portion to each other, and an object-side surface including a spherical first region having a first curvature and extending along a principal meridian, a spherical second region having a second curvature equal to the first curvature and facing the distance portion, and a third region located outside the first region and below the second region and having a third curvature smaller than the first curvature.

Abstract: In a wavelength swept light source using a polygon mirror in a well-known art, an oscillation wavelength roughly linearly varies in an upwardly slight convex shape with respect to time. On the other hand, in a wavelength swept light source of SS-OCT, the wavelength is required to vary so that a wavenumber (inverse of wavelength) linearly varies on a time axis. The wavelength swept light source of the well-known art has had a drawback that such wavelength variation cannot be implemented; non-linear distortion occurs in a resultant OCT image; and thereby, a point spread function cannot be kept sharp.

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: An accommodation ability acquisition unit, a near vision prescription range acquisition unit, a lens database storing design parameters of progressive-power lenses in response to addition power with respect to each of plural types, an accommodation ability computation unit computing used accommodation ability for near vision, a necessary addition power computation unit computing necessary addition power for near vision, a range computation unit computing the maximum distance ranges and the maximum near ranges when lenses are worn based on the necessary addition power in lenses selected as lenses having design elements of a set condition equal to or more than the necessary addition power of the plural types stored in the lens database, and an output control unit allowing a display device to display the maximum distance ranges and the maximum near ranges with respect to the lenses of the design types selected by a selecting unit in juxtaposition are provided.

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 having an eyeball-side surface including a distance portion and a near portion having different values of dioptric power and an intermediate portion that connects the distance portion and the near portion to each other, and an object-side surface including a spherical first region having a first curvature and extending along a principal meridian, a spherical second region having a second curvature equal to the first curvature and facing the distance portion, and a third region located outside the first region and below the second region and having a third curvature smaller than the first curvature.

Abstract: A progressive-power lens includes an eyeball-side surface including a distance portion and a near portion having different values of dioptric power. An intermediate portion connects the distance portion and the near portion to each other. An object-side surface of the progressive-power lens includes a first region extending along a principal meridian and having a spherical shape having first curvature, a second region facing the distance portion and having a spherical shape having second curvature equal to the first curvature, and a third region located outside the first region and below the second region and having third curvature greater than the first curvature.

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 method of designing a progressive power lens group as a set of progressive power lenses, each having a first refractive section having a refractive power for seeing an object located at a predetermined distance, a second refractive section having a refractive power for seeing an object located at a near distance, and a progressive section with its refractive power progressively changing from the first refractive section to the second refractive section, the progressive power lens group satisfying: a condition where the first refractive sections differing in refractive power can be selected; a condition where at least two additions can be selected for the first refractive section having an identical refractive power; a condition where refractive indexes of materials of the progressive power lenses are identical; and a condition where design concepts of the progressive power lenses are standardized, the method includes designing the progressive power lenses so that for the progressive power tenses identical i

Abstract: A central processing unit of a calculation server apparatus includes a reference design data selection unit for selecting reference design data from a plurality of reference design data stored in reference design data storage of storage memory, and an arrange design unit 123 for processing the reference design data so acquired on the basis of prescription data. The reference design data has point groups having coordinates of points and obtained by dividing a progressive surface as a reference into a lattice form.

Abstract: It has been difficult to manufacture an inside surface progressive-power lens which is as thin as an outside surface progressive-power lens due to a limited configuration of an object-side refractive surface of the inside surface progressive-power lens. However, a thin progressive-power lens with less blur and distortion can be provided at a reduced cost by forming its object-side refractive surface from an aspherical surface which is symmetric with respect to a rotational axis and has a smaller curvature at a distance reference point than that at a near reference point, and by forming an eyeball-side refractive surface from a combination of a progressive surface, an astigmatic refraction surface and an “as-worn” corrective aspherical surface.

Abstract: A method for providing design data and a system for providing design data that enable a lens processor to manufacture a desired inner-surface progressive addition lens corresponding to prescription data. A design data providing system is a system such that a design data creator provides design data of an inner-surface progressive addition lens to a lens processor in the case where the lens processor has agreed upon a contract to the effect that the lens processor receives provision of the design data of the inner-surface progressive addition lens from the design data creator on the condition that the lens processor pays a consideration. The design data providing system has a server device as a host computer device, a terminal computer device, and a network for connecting the server device to the terminal computer device.