摘要:
The invention relates to an apparatus (100) for determining the diameter of an ophthalmic compensation lens to be mounted onto a glasses frame, or for controlling the mounting of an ophthalmic compensation lens onto a glasses frame. According to the invention, the apparatus comprises: an electronic tablet having a screen (111); a glasses frame holder (120, 121, 122) having an opening and being suitable for holding said glasses frame in a predetermined position, one surface of the glasses frame being placed near the surface of the screen (111); a means for storing at least one graphic image comprising at least one graphic reference mark associated with the ophthalmic compensation lens and/or with the patient who is to wear the ophthalmic compensation lens mounted onto said frame; a means intended for processing said image and capable of generating a projected image; a means for displaying said projected image onto the screen; and a means for aligning said frame with regards to the projected image displayed on the screen.
摘要:
The invention relates to a method for determining at least one optical design parameter for a progressive ophthalmic lens intended to be fitted in a frame chosen by a wearer, depending on the visual behaviour of the latter, comprising the following steps: a) the wearer is placed in a situation in which he carries out a visual task at a first working distance; b) during this visual task, at least two gaze directions of the wearer at this first working distance are determined in a frame of reference of the head of the wearer; c) a relative position of a surface related to said frame or to an ophthalmic lens intended to be fitted in said frame is determined in this frame of reference of the head of the wearer; d) for each gaze direction at the first working distance determined in step b) the intersection between this gaze direction at the first working distance and said surface is determined so as to establish a map of these points of intersection on this surface; and e) said sought-after optical design parameter is deduced from this map.
摘要:
A method for providing a personalized optical system for a wearer wherein the optical system characterizes a spectacle ophthalmic lens comprising the following steps: a) providing a visual performance level (VPL) value of at least one eye of the wearer; b) providing a set of rules linking at least the visual performance level of step a) with at least one optical criterion chosen among one or both of the two following optical criteria groups consisting of central vision optical criterion (CVOC) group and peripheral vision optical criterion (PVOC) group; c) calculating the physical and geometrical parameters of the personalized optical system or selecting the personalized optical system in an optical systems data base comprising a plurality of optical systems, so that to meet the set of rules of step b) according to the visual performance level data provided in step a).
摘要:
The invention relates to a method for optical design of a pair of ophthalmic lenses for correcting spherical and cylindrical refractive errors of the eyes of a wearer, including a step (10) of defining the need for spherical and cylindrical correction of the wearer for various viewing distances, and a step (20) of determining the spherical and cylindrical power of the ophthalmic lenses at viewing points with various proximities, in accordance with the correction needs of the wearer. According to the invention, the power of at least one of the two ophthalmic lenses is determined (20) such as to limit the deviation obtained therebetween upon adding equivalent spherical power between the viewing points with various proximities and/or varying the cylindrical power vector between the viewing points with various proximities. The invention likewise relates to a pair of ophthalmic lenses designed according to such a method.
摘要:
The invention relates to a method of visual testing of an individual (10) comprising steps consisting in: a) placing said individual at a predetermined observation distance (D1) from a display surface (21) at which said individual observes, with a natural head carriage, said display surface, b) displaying, on said display surface, a visual test comprising at least one test image (22) in a visual field of said individual, and c) determining, on said display surface, a boundary (23) of zones of optimal/degraded vision of said test image by the individual in the configuration resulting from steps a) and b), said boundary delimiting respectively a zone of optimal vision (23A) and a zone of degraded vision (23B) of said visual field, for which zones said individual indicates that he sees said test image of the visual test in an optimal manner, respectively in a degraded manner.
摘要:
The invention relates to a method for fitting an actual predetermined glasses frame (10), selected by a given wearer, for the use thereof by said wearer. Said method comprises the following steps: b) the head (TS) of the wearer is at least partially modelled, in at least one reference system, with at least one model (MN) of part of the nose (N) and one model (MORD, MORG) of part of the ears (ORD, ORG); c) simulating the positioning of the frame (10) on the head (TS) of the wearer is carried out, in the model of the head (TS) of the wearer, by placing the corresponding areas of said frame (10), or a model of the latter, one over the other; and d) on the basis of placing these one over the other, the necessary change in shape of the actual predetermined frame (10) is determined in order to achieve a fitting of said frame (10) on the head (TS) of the wearer in accordance with at least one predetermined fitting criterion.
摘要:
The invention relates to a method for determining at least one optical design parameter for a progressive ophthalmic lens intended for being provided on a frame (10) selected by a wearer, in accordance with the visual behaviour thereof. According to the invention, the method includes the following steps: a) collecting a plurality of behavioural measurements relating to a plurality of positions and/or directions of the eyes of the wearer during a visual task; b) statistically processing said plurality of behavioural measurements such as to determine a wearing area of the surface of a lens mounted on said frame, said wearing area (ZU) being representative of a statistical spatial distribution of said plurality of behavioural measures; and c) determining at least one optical design parameter for a progressive ophthalmic lens in accordance with a position and/or size of the wearing area.
摘要:
The present invention relates to a display device for stereoscopic display, comprising a binocular display system, an informative content and a display source. The display device is noteworthy in that it further includes electronic components for implementing optimization software for optimizing the binocular display system, the informative content and the display source, said optimization software forming together a loop for managing various parameters. The wearer of said device may thus display the informative content by means of the binocular display system under conditions that are the most adapted to his physiology.