Configuring ophthalmic lenses that reduce oblique aberrations based on a wearer's accommodative demand values is disclosed. The accommodative demand values include A_(rel−) and A_(rel+) depend on object vergence L. The accommodative demand values are considered to and ensure no or reduced eye strain to the wearer. An improved merit function Φ′ is calculated based on the accommodative demand values. In the calculation, accommodative term A is a smooth and continuous function of both the object distance L and the spherical component of the power error. This ensures the accommodative demand values are well below maximum relative accommodations available to the wearer to prevent eye fatigue. The calculation may also include a smooth and continuous thresholding function ƒ that optimizes the merit function. The calculation may also include evaluation of the power error associated with various object vergencies for every direction of sight.

A method for determining a postural and visual behavior of a person, the method comprising:—a person image receiving step during which a plurality of images of the person are received,—a context determining step during which the plurality of images of the person are analyzed so as to determine context data representative of the context in which the person is on each image of the plurality of images,—an analyzing step during which the plurality of images of the person are analyzed so as to determine at least one oculomotor parameter of the person,—a postural and visual behavior determining step during which a postural and visual behavior of the person is determined based at least on the at least one oculomotor parameter and the context data.

A vision inspection and correction method, which uses an image adjustment software/device to separate the eyes of the inspected person on an independent display screen, and the visual mark seen by the same vision is designed to be misaligned; through the guidance and interaction of the inspector and the inspected person, the inspector can adjust the image operation to zoom in or out, shift, focus, diverge, and rotate, etc., so that the inspected person's binocular images can be clearly distinguished and adjusted. Then, the binocular images are aligned, and the inspector will implant the correction parameters during the image adjustment process into 3D projectors, VR (virtual reality), AR (augmented reality device), MR hybrid reality device and other equipment to adjust the binocular digital image parameters, so users have, or can provide to a lens maker, personalized adjustment for comfortable images of both eyes.

A binocular visual function measurement method including a visual target presentation step of a right eye image viewed by the right eye of a measurement subject and a left eye image viewed by the left eye of the measurement subject to the measurement subject on a single portable display screen; a presentation control step of changing positions where the right eye image and the left eye image are presented, relative to each other; a timing detection step of detecting a timing at which the measurement subject is unable to fuse the right eye image and the left eye image when the presentation positions are changed; and a parameter value calculation step of calculating a predetermined parameter value regarding a binocular visual function of the measurement subject based on a relationship between the relative positions of the right eye image and the left eye image when the timing is detected.

Provided are stereoscopic eyeglasses capable of reducing visual fatigue in binocular stereoscopic display by a simple configuration. In stereoscopic eyeglasses, in order to expand a tolerance of match between vergence and accommodation enabling comfortable stereovision in eyeglasses-using stereoscopic display, wide-focus lenses ranging in focal length are incorporated so as to overlap optical filters in light transmission directions, and accordingly, visual fatigue to be caused by vergence-accommodation conflict during stereoscopic image observation is reduced.

Provided is technology that makes it possible to measure visual behavior with respect to objects that are at different distances in the depth direction, while reducing burden on a subject. A method for measuring visual behavior of a subject to design an eyeglass lens includes: a step (a) of ascertaining a head rotation amount that is generated by the subject in a sagittal plane of the subject when gazing at each of a plurality of gaze points that are set at predetermined distances different from each other in a forward depth direction; and a step (b) of determining an eyeball rotation amount that is generated by the subject when gazing at each of the plurality of gaze points, based on the head rotation amount.

Provided is technology that makes it possible to design a progressive power lens appropriate for visual behavior of a subject. A method for designing a progressive power lens includes: a step (a) of determining a relationship between a line-of-sight passage position on a surface of a progressive power lens through which a line of sight of a subject wearing the progressive power lens passes and a reactive accommodation amount that the subject exhibits when the line of sight passes through the line-of-sight passage position, based on visual behavior of the subject; a step (b) of judging whether or not the reactive accommodation amount is within an appropriate range; a step (c) of determining a correction method for correcting the progressive power lens based on a result of judgement made in the step (b); and a step (d) of correcting a design of the progressive power lens based on the correction method determined in the step (c).

A method for manufacturing a lens element intended to be worn in front of an eye of a wearer, the method comprising obtaining a lens member comprising a holographic recording medium disposed on a first surface of the lens member, the holographic recording medium being configured to be able to convert an interference pattern into a holographic optical element, obtaining wearer prescription data relating at least to the prescription of the wearer, manufacturing a second surface of the lens member based on the wearer prescription data, and recording a holographic optical element within the holographic recording medium so as to provide an additional optical power of opposite sign to the prescribed optical power so as to slow down the progression of the abnormal refraction of the eye.

A method for determining an ophthalmic lens adapted to a wearer, the method including: receiving wearer data including at least the ophthalmic prescription of the wearer; receiving a set of object points associated with target optical performances based on the wearer data; determining an ophthalmic lens adapted to the wearer, the ophthalmic lens providing optical performances, for light rays propagating from the set of object points to the center of rotation of the eye of the wearer passing through the ophthalmic lens, the closest to the target optical performances.

A progressive addition lens design method includes adjusting a lens surface shape to bring a difference between a first state when an object at a first location in a wearer's front and on the wearer's medial plane is visually recognized and a second state when an object at a second location positioned on the first location side in the horizontal direction at a constant height in the vertical direction is visually recognized in a plane parallel to a frontal plane and includes the first location at the time the lens is worn closer to a difference between a third state when an object at the first location is visually recognized and a fourth state when an object at the second location is visually recognized at the time a reference single focal lens corresponding to the progressive addition lens is worn or at the time equivalent to a naked eye.