Abstract: The invention provides methods and lenses for reducing asthenopia related symptoms associated with proprioceptive disparity. In certain aspects, lenses of the invention include a distance portion and a near portion, and a progressive increase in minus power from the distance portion to the near portion. Additionally, lenses of the invention may include a prism and a progressive reduction in optical power, in which the prism and the progressive reduction are varied independently. In one embodiment, a lens is provided that has a base-in prism and that provides an increase in minus power from the distance vision portion of the lens to a near vision portion of the lens (i.e., a progressive reduction).

Abstract: An intraocular lens in which deterioration in contrast is suppressed even when the optical axis of the intraocular lens is decentered from the optical axis of the eyeball when the intraocular lens is inserted into the eye while the advantage of a conventional aberration reduction type intraocular lens that the image is seen clearly is sustained by employing such a power distribution as respectively having at least one positive power deviation region (E1) having a power larger than that represented by the reference power distribution and at least one negative power deviation region (E2) having a power smaller than that represented by the reference power distribution in the central region of the intraocular lens assuming that a power distribution being set to cancel the spherical aberration of cornea when the intraocular lens is inserted into the eye is the reference power distribution.

Abstract: Aspects of the present invention provide an ophthalmic lens comprising at least one regressive and at least one non-regressive rotationally symmetric optical design element. The regressive and non-regressive optical design elements can be combined so as to form a desired optical power profile for the lens while simultaneously exploiting the different relative orientation of the astigmatic vectors of the constituent regressive and non-regressive design elements, thereby resulting in reduced unwanted astigmatism. The regressive and non-regressive rotationally symmetric optical design elements can be positioned on different lens surfaces and in optical communication or can be collapsed onto the same lens surface. The regressive and non-regressive rotationally symmetric optical design elements can each contribute to the total add power of an ophthalmic lens.

Abstract: Ophthalmic lens comprising: a primary zone on a first face; a secondary zone on the first face between said primary zone and the peripheral edge of the lens; first and second regions forming a partition of the secondary zone, which are contiguous and alternate with a pitch. A spectacle eyeglass obtained from said lens produces a first ophthalmic correction in the primary zone and in the first regions, and a second ophthalmic correction in the second regions different from said first ophthalmic correction. An active system of vision comprises an occultation device comprising: a selection device for selecting the wearer's viewing state; an optical occultation system to occult alternatively a first group and a second group according to the wearer's viewing state selected by the selection device, the first group comprising at least the primary zone and the first regions, and the second group comprising at least the second regions.

Abstract: Aspects of the present invention provide progressive addition lenses (PALs) and techniques for designing PALs that result in improved visual performance for the wearer. PALs of the present invention can have vision zones with widths that are more in line with the actual or functional sizes used by wearers. PALs of the present invention can also introduce controlled amounts of unwanted astigmatism into one or more vision zones. By allowing vision zones to include manageable levels of astigmatism, the resulting PAL can avoid the harsh build-up of astigmatism typically found in conventional PALs at the periphery of the channel and viewing zones. Further, PALs of the present invention can be designed using a merit function to achieve an optimized iterative design that accounts for astigmatism vector orientation and not simply astigmatism magnitude as is the case with conventional PAL design.

Abstract: An apparatus for and methods of determining that the placement and alignment of progressive add lenses (PALs) in a subject's frame are correct. Namely, a PAL verification tool includes a chart and light source, wherein the chart is viewed by the subject and the light source is worn by the subject during a PAL verification process. The PAL verification method may include the steps of positioning the subject with respect to a near fixation point, the subject viewing the near fixation point with one eye and bringing it into best and clearest vision, measuring and recording a first head position with respect to the near fixation point, the subject viewing the near fixation point with the other eye and bringing it into best and clearest vision, measuring and logging a second head position with respect to the near fixation point, and determining the amount and direction of the difference in the first and second head positions and correlating to an amount and direction of PAL misalignment.

Abstract: Embodiments of the invention pertain to a method for producing a spectacle lens with optimal correction across the entire lens that take the patient's complete measured wavefront into account. Specific embodiments also consider one or more additional factors such as vertex distance, intermediate power, add power, segmental fitting height, pantoscopic tilt, and use conditions. The lens wavefront can be achieved by optimizing a corrected wavefront, where the corrected wavefront is the effect of the patient's measured wavefront and/or the lens wavefront. The optimization of the corrected wavefront can involve representing the measured wavefront and/or the lens wavefront on a grid. In an exemplary embodiment, the grid can lie in a plane. During the optimization, a subset of the grid can be used for the representation of the measured wavefront at a point on the grid so that the portions of the measured wavefront that contribute to the corrected wavefront at that point on the grid are taken into account.

Abstract: Ophthalmic lenses and spectacles for enhanced experience due to right-handedness or left-handedness.

Abstract: Embodiments of the present invention relate to a multifocal lens having a diffractive optical power region and a progressive optical power region. Embodiments of the present invention provide for the proper alignment and positioning of each of these regions, the amount of optical power provided by each of the regions, the optical design of the progressive optical power region, and the size and shape of each of the regions. The combination of these design parameters allows for an optical design having less unwanted astigmatism and distortion as well as both a wider channel width and a shorter channel length compared to conventional PALs. Embodiments of the present invention may also provide a new, inventive far-intermediate distance zone and may further provide for increased vertical stability of vision within a zone of the lens.

Abstract: Lenses are designed using wavefront measurements amenable to correction factors for near and far vision as well as pupil size to slow or stop myopia progression.

Abstract: Aspects of the present invention provide a lens comprising a non-rotationally symmetric aspheric optical element, surface or feature and a rotationally symmetric aspheric optical element, surface or feature. The non-rotationally symmetric aspheric optical feature can be a progressive power region. The non-rotationally symmetric aspheric optical feature and rotationally symmetric aspheric optical feature can be in optical communication when located on different surfaces of a lens or can be collapsed to occupy a single surface of a lens. The non-rotationally symmetric aspheric optical feature and rotationally symmetric aspheric optical feature can each contribute to the add power of a lens. Distortion (e.g., astigmatism) of a lens of the present invention can be reduced (e.g., globally and/or locally) by optically combing the non-rotationally symmetric aspheric optical feature with the rotationally symmetric aspheric optical feature.

Abstract: A method for producing a series of base lenses, which cover a predetermined power range, wherein each base lens of the series has a base power different from the base powers of the other base lenses of the series, and has at least one diffractive base grating, the method comprising: specifying the base powers of each base lens of the series and calculating the base grating of each base lens of the series so as to minimize the color fringe of the respective base lens with the specified base power in a predetermined region of the spectacle lens.

Abstract: The visual perception of a lens wearer is not only along the gaze direction, but also has a non-zero transverse extension, which is called perceptual span. Perceptual span is skewed to extend further in the reading direction, i.e., the line portion to be read next relative to the line portion that was just read. A technique is provided that determines a pair of progressive ophthalmic lenses that take such perceptual span into account.

Abstract: A method for retarding the progression of myopia in a human eye, the method comprising: providing (41) a concentric annular multi-zone refractive lens including: at least one correcting zone of optical power for correcting (42) refractive error, and at least one defocusing zone for projecting (43) at least one non-homogenous defocused image in front of at least a part of retina to inhibit myopic eye growth, the at least one defocusing zone having at least one less negative power; wherein the correcting and defocusing zones are alternated (45) in the lens and the zones are connected (46) to each other through integrated progressive transition curves.

Abstract: A progressive power lens 10 for spectacles has a distance portion 11 and a near portion 12 of different powers. A surface power OMHP in a horizontal direction on an object-side surface along a principal meridian 14 or a vertical reference line passing through a fitting point Pe, a surface power OMVP(y) in a vertical direction of the object-side surface, the absolute value IMHP of a surface power on an eye-side surface, and the absolute value IMVP of a surface power in a vertical direction on the eye-side surface satisfy the following condition. OMHP(y)>OMVP(y) IMHP(y)>IMVP(y) OMHP(y)?OMVP(y)=IMHP(y)?IMVP(y) In the conditions, y is a coordinate along the principal meridian or the vertical reference line.

Abstract: A process for determining a pair of personalized progressive ophthalmic lenses. and a computer program product associated to these processes. Right-handed persons and left-handed persons behave very differently when executing certain near vision tasks, such as writing on a sheet of paper. However, current lens designs do not take into account these behaviour differences. The comfort of wearing a pair of ophthalmic lenses can be improved for the wearer for whom the lenses are intended by adapting his near vision according to his handedness.

Abstract: A method comprising: performing eye exam to a subject having a first and second eye; determining a prescription for the first and second eyes, the prescription describing focal power for each of the first eye and the second eye for at least three distances; and providing the prescription to a machine that produces progressive glasses that comprise a first and second lenses, wherein the first and second lenses each having at least three focal portions associated with the at least three distances that are located in a same height in the glasses thereby enabling clear vision for the subject in the first eye and the second eye with respect to the at least three distances.

Abstract: A photochromic polyurethane laminate that is constructed to solve certain manufacturing difficulties involved in the production of plastic photochromic lenses is disclosed. The photochromic laminate includes at least two layers of a resinous material and a photochromic polyurethane layer that is interspersed between the two resinous layers and which contains photochromic compounds. The polyurethane layer is formed by curing a mixture of a solid thermoplastic polyurethane, at least one isocyanate prepolymer, at least one photochromic compound, and a stabilizing system.

Abstract: A method of generating a target surface {tilde over (S)}( ?) of an optical lens for the manufacture of the optical lens according to optical lens parameters ?, the method comprising: providing a set of L first surface difference data E(?j) each first surface difference data E(?j) corresponding to the surface difference between a pre-calculated surface S?jpc(??j) (j=1, . . . , L) and an initial surface S?jini (j=1, . . . , L), from which the target surface will be generated, according to the expression: E(?j)=S?jpc(??j)?S?jini (j=1, . . . , L) where ?j (j=1, . . .

Abstract: A method and apparatus for creating a progressive spectacle lens design by transforming a starting design. The starting design is defined to include specification of a principal line, specifications for target astigmatism values A(u=0,y) along the principal line, and specifications for the course of a base target isoastigmatism line, which is described by a one-dimensional function of the form uG(y)=ƒ(y). The method and apparatus transform the starting design by modifying the course of the base target isoastigmatism line uG(y)?u?G(y), and calculating the target astigmatism values A(u,y) of the spectacle lens design by an interpolation between the target astigmatism values A(u=0,y) on the principal line and the target astigmatism values A(u?G(y),y) on the modified base target isoastigmatism line. Furthermore, the method and apparatus are provided to create the spectacle lens for the wearer on the basis of the progressive spectacle lens design.

Abstract: A progressive addition lens for a wearer, the optical lens having an addition lower by at least 0.5 diopter to the prescribed addition value of the wearer, wherein for a pupil diameter of 4 mm the modulation transfer function is greater or equal to 0.

Abstract: A method for designing a progressive lens is disclosed. The method includes obtaining a wavefront measurement of an eye, determining an initial design for the progressive lens based on the wavefront measurement, determining information about how changes in one or more higher order aberrations of the eye affect a second order correction for the aberrations of the eye based on information derived from the wavefront measurement, modifying the initial design of the progressive lens to provide a final progressive lens design, and outputting the final lens design.

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: An eyeglass lens, comprising: a hidden mark defining a predetermined reference point; and refractive portions arranged along a meridian extending substantially in a vertical direction via the predetermined reference point, and wherein the refractive portions comprises: a first refractive portion located on a lower side of the predetermined reference point and having a first refractive power; a second refractive portion located on an upper side of the predetermined reference point and having a second refractive power smaller than the first refractive power; and an intermediate refractive portion in which refractive power continuously decreases, and an aberration distribution in the first refractive portion is substantially symmetrical in a left and right direction with respect to the meridian extending in the vertical direction, and an aberration distribution in the second refractive portion is asymmetrical in the left and right direction with respect to the meridian shifted to an ear side.

Abstract: There is provided a progressive addition lens, including: a distance portion and a near portion; an object side surface including a first toric surface element; and an eyeball side surface including a second toric surface element that cancels the first toric surface element, wherein the first toric surface element is the element in which a vertical surface power OVPf1 at a distance reference point which is previously defined in the distance portion on the object side surface, is larger than a horizontal surface power OHPf1 at the distance reference point, and OVPf1 is not less than a vertical surface power OVPn1 at a near reference point which is previously defined in the near potion on the object side surface.

Abstract: A progressive lens comprising a progressive ophthalmic surface including a main progression meridian dividing the surface into a nasal portion and a temporal portion and passing through at least one fitting point Py of ordinate Yp in a coordinate system centered on a reference point O(0; 0). For the points located at an ordinate Yp on either side of said fitting point Py, the points of ordinate Yp being contained inside a 50 mm diameter disc centered on the reference point O: 0.5 ? ? MaxgradCyl Ny ? ? 1 - MaxgradCyl Ty ? ? 1 MaxgradCyl Ny ? ? 1 + MaxgradCyl Ty ? ? 1 ? ? 0.2 where: MaxgradCylNy1 is the absolute value of the maximum cylinder gradient of all the points located at said ordinate Yp in the nasal portion of the surface; and MaxgradCylTy1 is the absolute value of the maximum cylinder gradient of all the points located at said ordinate Yp in the temporal portion of the surface.

Abstract: Method for determining movement data representing the movement of a machining tool of an optical lens 3D machining device for machining a surface of an optical lens, wherein the method comprises: a machining tool data providing stage, a surface data providing stage, a machining rule providing stage, a 3D surface determining stage in which the 3D surface corresponding to the surface consisting of all the positions of the reference point of the machining tool that allow the profile of the cutting edge of the machining tool to tangent the derivable surface of the optical lens is determined, a movement data determining stage.

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: The invention provides methods and lenses for reducing asthenopia related symptoms associated with proprioceptive disparity. In certain aspects, lenses of the invention include a distance portion and a near portion, and a progressive increase in minus power from the distance portion to the near portion. Additionally, lenses of the invention may include a prism and a progressive reduction in optical power, in which the prism and the progressive reduction are varied independently. In one embodiment, a lens is provided that has a base-in prism and that provides an increase in minus power from the distance vision portion of the lens to a near vision portion of the lens (i.e., a progressive reduction).

Abstract: There is provided a spectacle lens, including: specific first and second reference points, and eye point between the first and second reference points on a meridian, with each point defined on a meridian; and a power variation portion where power is continuously varied from the first reference point to the second reference point, wherein a variation rate of an addition power is substantially zero in a circle of radius 4 mm with the first reference point as a center, and/or in a circle of radius 4 mm with the eye point as a center.

Abstract: The invention provides an ophthalmic lens comprising one or more oblique prismatic component, wherein the lens slows myopia progression and/or treats or prevents myopia or a disease or condition associated with myopia. The one or more oblique prismatic components may be base-down or base-down and base-in or base up and base-in. The one or more oblique prismatic components may be central and/or in a distance and/or near zone of the ophthalmic lens. The invention also provides an ophthalmic lens comprising a central base-down prism in a distance zone wherein the lens slows myopia progression and/or treats or prevents myopia or a disease or condition associated with myopia. Also provided is an optical device comprising one or more ophthalmic lenses and a method of slowing myopia progression and/or treating or preventing myopia or a disease or condition associated with myopia including using one or more ophthalmic lenses.

Abstract: There is provided a lens that includes a corridor having a width greater than or equal to about 6 millimeters. The lens has astigmatism less than or equal to about 0.5 diopter within the corridor. There is also provided an item of eyewear that includes such a lens, and a method for representing a surface of an ophthalmic lens.

Abstract: A method for determining a progressive ophthalmic lens, comprising determining first, second and third intermediate values of regression as the strongest regression that can be applied on the front surface of the lens while keeping a mean sphere value in at least a portion of the lower part of the rear surface of the lens less or equal to, respectively, first, second and third predetermined values; and determining a value of regression (d) for the front surface as the maximum value among the first, second and third intermediate values of regression.

Abstract: An apparatus for eye sight enhancement includes a lens having a first mode with a first optical power and a second mode with a second optical power, an actuator device adapted to vary a mode of the lens from the first mode to the second mode and from the second mode to the first mode, a fixing device adapted to fix the lens in a mounting position, a sensor device adapted to determine a focusing distance, and a processor adapted to control an operation of the actuator device depending on the focusing distance.

Abstract: The invention relates to a finished or semi-finished lens which comprises: a disc containing all the points of the lens that have the same abscissa and the same ordinate as points located within a circle in the reference plane having a diameter of 30 millimeters and centered on the prism reference point; a progression length of less than 14.5 millimeters; a first specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the nasal area and in the disc; and a second specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the temporal area and in the disc; a first ratio between: the maximum gradient of the cylinder for the points of the lens that have the same abscissa and the same ordinate as the points located on segments connecting the mounting cross to the first and second specific points, and surface addition of less than 0.

Abstract: Ophthalmic lens comprising: a primary zone on a first face; a secondary zone on the first face between said primary zone and the peripheral edge of the lens; first and second regions forming a partition of the secondary zone, which are contiguous and alternate with a pitch. A spectacle eyeglass obtained from said lens produces a first ophthalmic correction in the primary zone and in the first regions, and a second ophthalmic correction in the second regions different from said first ophthalmic correction. An active system of vision comprises an occultation device comprising: a selection device for selecting the wearer's viewing state; an optical occultation system to occult alternatively a first group and a second group according to the wearer's viewing state selected by the selection device, the first group comprising at least the primary zone and the first regions, and the second group comprising at least the second regions.

Abstract: The present invention relates to a method for transforming an initial progressive ophthalmic surface which has to be manufactured by a manufacturing method, the transformation method comprising: a step of selecting a manufacturing method intended to be implemented, in which said manufacturing method introduces a reproducible surface defect, a step of selecting a predictive model of said reproducible surface defect, a step of selecting an initial progressive ophthalmic surface S intended to be manufactured, a step of determining (S1), during which there is determined, by means of said predictive model, a surface defect value D which would be introduced if the initial progressive ophthalmic surface S were produced by said manufacturing method, a transformation step (S2), during which said initial progressive ophthalmic surface S is transformed into a transformed progressive ophthalmic surface S* by compensating the defect value D determined during the step (S1), such that the subsequent manufacture of the tr

Abstract: A contact lens is provided. It is a rigid gas permeable, corneal-scleral progressive, multifocal, vision lens that covers the cornea and a portion of the sclera of an eye. It is particularly beneficial for use on patients who have undergone refractive surgery and/or on patients experiencing presbyopia. The lens is designed to have dual touch contact with an eye. One contact point is the central portion of the cornea and the other contact point is a portion of the sclera.

Abstract: Information is stored in an optical element in the form of a glass or plastic body embodied as spectacles lens, spectacles lens blank or spectacles lens semi-finished product. The information in the form of data is stored on or in the glass or plastic body by creating at least one marking with a marking system. The marking can be read by a reading apparatus. The marking system has an interface for reading information individualizing the optical element. The marking is created permanently by the marking system on or in the optical element at a definition point of a local body-specific coordinate system set by two points on or in the optical element. In this body coordinate system, the manufacturer specifies the position of the lens horizontal and/or the far and/or the near and/or the prism reference point.

Abstract: The invention relates to a method for determining an ophthalmic lens wherein: a first and a second reference axes (?1, ?2) are determined, the first reference axis being set to a value comprised between [???20°, ??+20°] with ?? being the mean axis of astigmatism over a first temporal portion (Portion 1), and the second reference axis being set to a value comprised between [yN?20°, YN+20°] with YN being the mean axis of astigmatism over a second nasal portion (Portion 2); a combined reference axis (?) is determined as a linear combination of the first and second reference axes; over the first portion, the sphere value along the combined reference axis is superior to the sphere value along a perpendicular axis to the combined reference axis (Formula I); and over the second portion, the sphere value along the combined reference axis is superior to the sphere value along a perpendicular axis to the combined reference axis (Formula I).

Abstract: An individual spectacle lens design for a progressive spectacle lens exhibiting an individual vertical position of the distance and/or the near reference points, which can be variably adjusted, is calculated. A starting design exhibiting a predefined vertical position of the distance and/or the near reference points is determined; the individual spectacle lens design is calculated having the desired, individual vertical position of the distance and/or near reference points. The calculation of the individual spectacle lens design includes calculating the target value for the spatial distribution of at least one optical property of the individual spectacle lens by a mapping and a transform, where the starting design has a corresponding target value.

Abstract: A progressive-power spectacle lens design method, the progressive-power spectacle lens including a distance portion, a near portion, and a progressive portion provided between the distance portion and the near portion, the method comprising: decreasing a distance along a principal meridian from a fitting point to a progression start point and increasing a length of a progressive corridor defined by the progression start point and a progression end point when addition power is large, whereas increasing the distance along the principal meridian from the fitting point to the progression start point and decreasing the length of the progressive corridor when the addition power is small, wherein the distance from the fitting point to the progression end point is fixed irrespective of the addition power.

Abstract: A progressive ophthalmic lens element is disclosed. The progressive ophthalmic lens element includes an upper viewing zone, a lower viewing zone, a corridor, and a peripheral region disposed on each side of the lower viewing zone. The upper viewing zone includes a distance reference point (DRP) and a fitting cross, and provides a first refractive power for distance vision. The lower viewing zone, which is for near vision, provides an addition power relative to the first refractive power. The corridor connects the upper and lower zones and provides a refractive power varying from that of the upper viewing zone to that of the lower viewing zone. Each peripheral region includes a zone of positive power relative to the addition power which provides therein a positive refractive power relative to the refractive power of the lower viewing zone.

Abstract: Methods for optimizing postural prism to be added to a pair of ophthalmic multifocal lenses (lenses) adapted to a wearer and to slow down myopia progression are described. The method includes an initial pair of lenses in a providing step S1. In a postural prism adding step S2, a same postural prism is added to each lens. In a gazing step S3, the wearer gazes at a first distance target through the lenses with the added postural prism. A gazing direction determining step S4 determines the wearer's gazing direction during S3. Steps S2 to S4 may be repeated while changing the added postural prism, wherein the added postural prism is smaller than or equal to a maximum prism value. Steps S2 to S4 may be repeated to determine the smallest added postural prism for which the wearer's gazing direction in step S4 passes through the first vision zone.

Abstract: There is provided a progressive addition lens capable of improving both of astigmatism and power error on a peripheral part of a distance area, including a distance area used for a distance vision, and other area different from the distance area, wherein at least one of an eyeball side surface of a wearer and an object side surface in the progressive addition lens is formed into an aspheric form, and when a prescription value T to be obtained from formula “S+C/2” expressed by a prescribed spherical power S and a cylindrical power C, is minus, the area where a power deviation ?D of a spherical equivalent power D from the prescription value T goes negative, exists on principal sight line in the distance area.

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: In one aspect, the invention is directed to a multifocal ophthalmic lens having a first region having first focal properties, and a second region having second focal properties and including a progressive region. The second region may further include, for example, a portion that is a reading region. The second region has two side edges and there are first and second transition regions between the first region and the side edges of the second region. The transition regions each have a width that is less than a selected width. This gives the lens designer more freedom to provide a wider second region without extending into lower left and lower right regions of the lens.

Abstract: Contact lenses incorporating asymmetric radial power profiles that increase the radial dioptric power from the center to the margin of the optical zone of the lenses may be utilized to prevent and/or slow myopia progression. The power profiles vary along different meridians.

Abstract: A method comprising: performing eye exam to a subject having a first and second eye; determining a prescription for the first and second eyes, the prescription describing focal power for each of the first eye and the second eye for at least three distances; and providing the prescription to a machine that produces progressive glasses that comprise a first and second lenses, wherein the first and second lenses each having at least three focal portions associated with the at least three distances that are located in a same height in the glasses thereby enabling clear vision for the subject in the first eye and the second eye with respect to the at least three distances.

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.