Abstract: A lens element worn in front of an eye of a person includes a refraction area having a refractive power based on a prescription for the eye of the person, and a plurality of at least three optical elements, wherein the optical elements are configured so that along at least one section of the lens the mean sphere of optical elements increases from a point of the section towards the peripheral part of the section.

Abstract: A lens element worn in front of an eye of a person includes a refraction area having a first refractive power based on a prescription for correcting an abnormal refraction of the eye of the person and a second refractive power different from the first refractive power and a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye so as to slow down the progression of the abnormal refraction of the eye.

Abstract: A lens element worn in front of an eye of a person includes a refraction area having a first refractive power based on a prescription for correcting an abnormal refraction of the eye of the person and a second refractive power different from the first refractive power and a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye so as to slow down the progression of the abnormal refraction of the eye.

Abstract: A lens element worn in front of an eye of a person includes a refraction area having a refractive power based on a prescription for the eye of the person, and a plurality of at least three optical elements, wherein the optical elements are configured so that along at least one section of the lens the mean sphere of optical elements increases from a point of the section towards the peripheral part of the section.

Abstract: A lens element intended to be worn in front of an eye of a person that includes a refraction area having a refractive power based on a prescription for the eye of the person, and a plurality of at least three non-contiguous optical elements, at least one optical element having a non-spherical optical function.

Abstract: Disclosed is a method implemented with a head-mounted device for identifying a distinct device within a given range distance of the head-mounted device, the head-mounted device includes a receiver adapted to receive wireless signals and a memory adapted to store data. The method includes: a tag data receiving step during which tag data identifying at least one electronic wireless tag placed on the distinct device are received by the receiver of the head-mounted device; a storing step during which the stored data including the tag data are stored in the memory of the head-mounted device; and an identification step during which the device is identified based on the stored data.

Abstract: A method for determining personalized near addition value for non-presbyopes, including measuring fusional amplitudes and phoria with at least one addition value, on both eyes of a person at a working distance; finding a mathematical function that predicts the change of a pair of fusional amplitudes and phoria as a function of addition value based on the addition value and the measured fusional amplitudes and phoria; and determining the near addition value according to a suitable relationship between the pair of fusional amplitudes and phoria on the mathematical function.

Abstract: Progressive multifocal ophthalmic lens having a power addition (Add) and an astigmatism prescription, and having a far vision point CM, a near vision point NV, and an intermediate vision point IV positioned between CM and NV. The resulting astigmatism in the far and near vision zones is smaller than or equal to the resulting astigmatism in the intermediate vision zone, wherein the resulting astigmatism is the difference between the prescribed astigmatism and the astigmatism generated by the working lens under usual wear conditions. The lens provides good optical quality images in the far and near vision zones, and the resulting astigmatism in the intermediate vision zone encourages the wearer to use the far and near vision zones rather than the intermediate vision zone, thus reducing the risk of increasing the degree of myopia of the wearer in the long term.

Abstract: A method of evaluating the efficiency of a myopia control product for a wearer, the method comprising: an initial myopia indicator providing step S1, during which the initial value of a myopia indicator of the wearer is provided, a myopia condition step S2, during which the wearer using the myopia control product is placed in myopia inducing conditions, a resulting myopia indicator determining step S3, during which the resulting value of the myopia indicator of the wearer is determined after the wearer has been placed in the myopia inducing conditions, an efficiency evaluation step S4, during which the efficiency of the myopia control product is evaluated by comparing the initial value of the myopia indicator and the resulting value of the myopia indicator.

Abstract: A method for determining personalized near addition value for non-presbyopes, including measuring fusional amplitudes and phoria with at least one addition value, on both eyes of a person at a working distance; finding a mathematical function that predicts the change of a pair of fusional amplitudes and phoria as a function of addition value based on the addition value and the measured fusional amplitudes and phoria; and determining the near addition value according to a suitable relationship between the pair of fusional amplitudes and phoria on the mathematical function.

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: 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: A method of evaluating the efficiency of a myopia control product for a wearer, the method comprising: an initial myopia indicator providing step S1, during which the initial value of a myopia indicator of the wearer is provided, a myopia condition step S2, during which the wearer using the myopia control product is placed in myopia inducing conditions, a resulting myopia indicator determining step S3, during which the resulting value of the myopia indicator of the wearer is determined after the wearer has been placed in the myopia inducing conditions, an efficiency evaluation step S4, during which the efficiency of the myopia control product is evaluated by comparing the initial value of the myopia indicator and the resulting value of the myopia indicator.

Abstract: The invention relates to a progressive multifocal ophthalmic lens comprising a power addition prescription Add and a complex surface, the complex surface comprising having far and near vision zone with resulting astigmatism smaller than Add/3 and an intermediate vision zone with resulting astigmatism greater than Add/3.

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: An indicating device (10, 100) for indicating the ametropia progression of a wearer over a predetermined period of time according to at least the type of ophthalmic lens the wearer may use. The device comprises first (12, 120) and second (14, 140) members connected together in a moveable manner. The first member (12, 120) has a first field (22, 220) including a plurality of values of input data and a second field (24, 240) including a plurality of values of output data representative of the ametropia of a wearer. The second member (14, 140) has at least a selection mean (40, 400) and an indication mean. The selection means (40, 400) is arranged to select among movement of the second member (14, 140) a value of the input data corresponding to a wearer.

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: An optical system having a transmission pattern comprising at least a first zone Z1 extending from at or about 380 nm to a first limit L1 between Z1, and a second zone Z2. A third zone Z3 extends from a second limit L2 between Z2 and Z3 to about 780 nm. L1 may be greater than or equal to or about 436 nm. Second limit L2 may be greater than L1 and smaller than or equal to or about 487 nm. The average transmission values T1, T2, T3, in each zone Z1, Z2, Z3 may be: T2>5*(T1+T3)/2, with T1 the average transmission over Z1, T2 the average transmission over Z2, T3 the average transmission over Z3. T1 and T3 may be greater than or equal to or about 3% and smaller than or equal to or about 70%. T2 may be greater than or equal to or about 75%.

Abstract: The invention relates to a method for characterizing a perception of blur by a subject (10) in order to determine a dioptric blur value for an image (C) observed by the subject. The image has a blur generated by the low-pass filtering of the image components in accordance with the respective space frequencies of said image components. An indication of the perception thereof of blur in the image is provided by the subject and is associated with the dioptric blur value. Several images associated with different dioptric blur values are used for defining a dioptric blur threshold value for the subject that corresponds to a blur perception criterion. The invention can be used for adjusting the design of a progressive lens for the subject in accordance with the sensitivity to said visual blur of said object.

Abstract: A method for producing an ophthalmic spectacle lens makes it possible to fit out a wearer of lenses in a manner which is customized as a function of a perception of blur by said wearer. The lens is selected so that the wearer has the impression of having a field of sharp vision which has a reference width. This reference width is determined on the basis of a first lens which complies with the wearer's ophthalmic prescription and a reference threshold value of the blur. It is thereafter associated within the lens which is provided for the wearer with a threshold value of the blur which is perceived by this wearer.