• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The device for measuring the subjective refraction of a person in close and / or intermediate vision comprises, according to the invention, for each eye of the person, a correction support (3) equipped with at least one correction lens , the correction supports (3) being arranged in such a way that the person looks through the lenses. The position of each support (3) correction is variable to adjust an angle (α) between the axes of the lenses.
    公开号:FR3014674A1
    申请号:FR1362834
    申请日:2013-12-17
    公开日:2015-06-19
    发明作者:Benjamin Rousseau；Martha Hernandez；Konogan Baranton；Pedro Ourives；Gildas Marin
    申请人:Essilor International Compagnie Generale dOptique SA；
    IPC主号:
    专利说明:

    [0001] The invention relates to a device for measuring subjective refraction 5 in near vision or in intermediate vision. The context of the invention lies in the measurement of parameters to be indicated on an optical prescription for a person in need of corrective lens equipment, so as to correct vision defects such as myopia, farsightedness, farsightedness. astigmatism and / or presbyopia. The invention also relates to a method of measuring subjective refraction in near vision and / or intermediate vision. Generally, and as part of this description, near vision is associated with distances up to 70 cm, and with intermediate vision distances of about 70 cm to four meters. For example, close vision can be associated with reading a book or smartphone held in the hands, and the intermediate vision with the vision on a computer screen, a television set, a dashboard of a car, or to housework. Devices and methods for measuring the subjective refraction of a person are known. In particular, a refractor head is used to determine the type (sphere and / or cylinder) and the power (measured in diopters) of the necessary corrective lenses. This refractor head is part of a set called refraction unit. The refractor head is a device having inside a glass holder (or correction support) consisting of two holes and can accommodate corrective lenses. The refractor head has degrees of freedom of translation to properly position the corrective lenses in front of the person's eyes. To measure the refraction of the vision from a distance, the person looks straight ahead through the holes an optometric chart placed at infinity (for example, on a wall about 5 to 6 m). Then, to measure the near vision, the patient looks, through the refractor, a vertical reading plane, for example displaying a pattern, placed at a fixed distance of about 40 cm. To make these measurements, the direction of the gaze of the person does not change with respect to his head. The professional places corrective lenses of different types and powers in the lens holder and makes adjustments (for example, to adjust the interpupillary distance) in order to determine the corrective lens or the combination of glasses offering the best possible vision, by based on the subjective return of the patient. Typically, to determine the optical prescription for near vision, an additional correction (consisting of at least one corrective lens) is added to at least one corrective lens corresponding to the prescription for distance vision. However, the technique described above does not take into account the convergence of the gaze lines of the person in near vision. Indeed, when the person looks at a reading plan in close vision, his eyes are convergent, the convergence meaning that the eyes are turned so that their axes intersect on the reading plane. In intermediate vision, the gaze is also convergent to a lesser extent. In both cases, the gaze can also be lowered. Consequently, during the near-vision and / or intermediate vision measurement with the known method and devices, the person is likely not to look centrally through the corrective lenses, which can lead to aberrations and thus distort the values of the optical prescription. It is possible that the glasses prescribed to the person are not optimally adapted to the vision of the person. In addition, the described technique does not measure the cylinder change that can cause the lowering of the gaze. The present invention aims to overcome the disadvantages mentioned above by providing a device for measuring the subjective refraction of a person in near vision and / or intermediate taking into account the convergence of the person's gaze, in order to him allow to adopt a natural posture during the measurement and to minimize or avoid optical aberrations. The invention also proposes a method for measuring the subjective refraction of a person in close and / or intermediate vision.
    [0002] According to a first aspect, the present invention relates to a device for measuring the subjective refraction of a person in close and / or intermediate vision, the device comprising, for each eye of the person, a correction support equipped with at least a correction lens, the correction supports being arranged so that the person looks through the lenses. The main feature of the device according to the invention is that the position of each correction support is variable to adjust an angle between the axes of the lenses. Such a device makes it possible to measure the subjective refraction in close and / or intermediate vision for a person being in a natural position, the axes of the eyes being convergent, thanks to the adaptability of the angle between the axes of the lenses and thus of the angle between the planes of the correction supports, namely the planes of the lenses. The optical prescription determined or confirmed using the device according to the invention then allows to design a corrective lens equipment perfectly suited to the vision of the person, including near and intermediate vision. In addition, the adjustments of the correction support make it possible to perfectly adapt the device to the morphology of the person. Advantageously, the device further comprises means for determining the direction of the gaze, so as to adjust the relative positions of the correction supports to converge the viewing directions of the two eyes at a convergence angle, so as to guide the look of the person on a motive. Preferably, the angle between the axes of the lenses is adjustable between 0 ° and 30 °. This allows for different interpupillary distances and different distances between the eyes and the pattern. The angle between the planes of the correction supports, which corresponds to the angle of convergence, can therefore preferably vary between 150 ° and 180 °. Preferably, each correction support is adjustable in inclination to lower the viewing directions at a pantoscopic angle. Advantageously, the device according to the invention further comprises a reading medium arranged at a variable distance and angle with respect to the correction media, the reading medium being intended to display the pattern. Preferably, the device according to the invention further comprises adjustment means for reducing the difference between the position of the correction supports and a reference position of the correction supports, the positions being relative to the pattern, in which the setpoint position corresponds to a position of the correction supports in which the person looks centrally and perpendicularly through the lenses. According to an advantageous embodiment, the means for determining the gaze direction comprise, for each eye, a viewfinder intended to be put in place in front of the eye by means of the correction support. Preferably, the viewfinder comprises an input element and an output element adapted to be aligned in the direction of gaze between the eye and the target. For example, the viewfinder may comprise a cylinder having an opaque or frosted cylindrical surface. The inlet and outlet faces of the cylinder may, for example, comprise a sighting hole or a target. According to another advantageous embodiment, the means for determining the direction of gaze comprise acquisition means 20 and image processing. Preferably, the means for determining the direction of the gaze also comprise a light emitting means emitting in the direction of the person's eyes. Advantageously, the device according to the present invention comprises a means of discriminating the two eyes. Thus, it is possible to measure the subjective refraction for each eye independently. According to a second aspect, the present invention also relates to a method of measuring the subjective refraction of a person in close and / or intermediate vision, by means of a device according to the invention, the method comprising a step of implementing place, in front of each eye of the person by means of the correction support, at least one correction lens corresponding to the prescription of near and / or intermediate vision.
    [0003] The main features of the method according to the invention are the following steps: variation of the positions of the correction supports to adjust an angle between the axes of the lenses; and - determining the visual acuity of the person in close and / or intermediate vision. In a particularly advantageous manner, the method according to the invention further comprises the following steps: determining the direction of gaze of the two eyes; and - adjusting the relative positions of the correction supports to converge the viewing directions at a convergence angle, so as to guide the person's gaze on the pattern. According to a first advantageous embodiment, the step of determining the direction of the gaze comprises a step of placing the viewfinder in front of each eye by means of the correction support. According to a second advantageous embodiment, the step of determining the gaze direction comprises a step of determining the center of rotation of a third embodiment. According to a third advantageous embodiment, the step of determining the direction of the gaze comprises a step determining the positions of the pupils. Advantageously, the method further comprises a step of inclining a plane containing the correction supports to lower the viewing directions at a pantoscopic angle. Advantageously, the step of measuring the visual acuity in near vision and / or intermediate vision comprises the following steps: - establishment of means of discrimination of the two eyes; and measuring visual acuity in near and / or intermediate vision for each eye independently.
    [0004] Preferably, the method according to the invention further comprises an iterative adjustment step, by means of adjustment means, of the position of the correction supports to reduce the difference between the position of the correction supports and a setpoint position. correction supports, the positions being relative to the pattern, wherein the setpoint position corresponds to a position of the correction media in which the person looks centrally and perpendicularly through the lenses. The invention and its advantages will be better understood from the following description of embodiments of the invention, given by way of example and with reference to the appended figures, in which: FIG. a part of a device for measuring the subjective refraction of a person in near and / or intermediate vision according to one embodiment of the invention; FIG. 2A shows, by way of example, a head support and correction supports equipped with sighting cylinders according to one embodiment of the invention; Figure 2B schematically illustrates a side view of the correction media having an angle of inclination with respect to the vertical, according to one embodiment; - Figure 3A schematically shows a sighting cylinder according to one embodiment of the invention; FIG. 3B illustrates the angle of convergence between the axes of the aiming cylinders; Figure 4A shows a view of a reading medium of the device according to one embodiment; and FIG. 4B shows, by way of example, a front view of the reading medium.
    [0005] According to a first aspect, the present invention proposes a device for measuring the subjective refraction of a person, or a patient, in close and / or intermediate vision. Figure 1 shows a part of a device for measuring the subjective refraction of a person in near vision and / or intermediate according to one embodiment of the invention. The device comprises, for each eye of the person, a correction support 3 for receiving at least one correction lens (not shown). The correction supports 3 are arranged so that the person looks through the correction lens for each eye. The correction supports 3 may be, for example, of the type of a trial mount. A more detailed view of the correction supports 3 is shown in FIG. 2A. Referring to FIG. 2A, the device according to the embodiment presented furthermore comprises, for each eye of the person, a viewfinder 5 defined by an axis and intended to be put in place in front of the eye by means of the support of correction 3. The relative positions of the correction supports 3 are adjustable to converge the axes of the viewers, so as to guide the person's gaze on a pattern (not shown) for measuring the visual acuity in near vision and / or intermediate. By "visual acuity", we understand the visual performance in the broad sense, for example: visual acuity strictly speaking, sensitivity to contrast, sensitivity to blur, subjective appreciation of the image quality. By "relative positions", one understands the relative position of one of the supports 3 of correction relative to the other. For example, in FIG. 2A, the two correction supports 3 are tilted relative to one another. The relative positions make it possible to define the angle of convergence α between the axes of the viewers 5 (see also FIG. 3B). Thus, for a convergence angle α of zero, the correction supports 3 are in the same plane. The angle of convergence a varies according to the pupillary distance (PDD) of the person whose subjective refraction is measured and a distance of sight (D) between the correction supports 3 and the pattern, and can be expressed as follows : a = arctan (IPD / D). For example, for a viewing distance of 40 cm and a pupillary distance of 64 mm, the convergence angle α is about 9.1 °; for a viewing distance of 5 m and a pupillary distance of 64 mm, the convergence angle α is about 0.7 °. Preferably, the convergence angle α and therefore the angle between the correction supports 3 is adjustable between 0 ° and 30 °.
    [0006] The pattern may be characters such as letters, known optotypes such as a Landolt ring or any other figure for measuring visual acuity. The pattern can also be a duochrome test, for example a black letter on a red or green background. It can also be a test of contrast sensitivity, phoria test, disparities, binocular vision. The sights 5 can be constituted, for example, by cylinders 5, as shown in Figure 2A. Figure 3A schematically illustrates in more detail a sighting cylinder 5 according to a preferred embodiment. The cylinder 5 is hollow. It has a main axis 52, a frosted or opaque lateral cylindrical surface 51, an inlet circular face 53 which is close to the eye and a circular exit face 55. The inlet face 53 is constituted by a washer having a diameter greater than the cylinder 5, which allows the cylinder 5 to be held in the support 3 of correction (see Figure 2A). The puck may be frosted or opaque. According to the embodiment illustrated in FIG. 3A, the inlet face 53 comprises a sighting hole 57 in order to guide the view into the cylinder 5. The aiming hole 57 has a pinhole effect which increases the depth of field. The exit face 55 includes a cross-shaped pattern 59 for guiding the look on the pattern. Alternatively, the input face 53 may also include, in place of the sighting hole, a pattern. For example, the length of the cylinder 5 is of the order of 3 cm, its diameter of the order of 1 cm, and the diameter of the hole 57 of the order of 2 mm. The viewfinder 5 makes it possible to limit the gaze to the axis of the viewfinder 5. In practice, the positions of the correction supports 3 are adjusted by means of the sights 5 installed in the correction supports 3. Thus, the axes of the gaze of the person are well determined and will be confused with the optical axes of the correction lenses. Then, the correction lens or lenses inserted into the correction supports 3. Thus, the positions of the correction supports 3 are adjusted so that the lens or the correction lenses are placed in the correction supports 3 with their axes coinciding with that of each eye. The patient looks through the correction glass (s) in a straight and centered manner. The optical prescription determined or confirmed using the device according to the invention then allows to design a corrective lens equipment perfectly suited to the vision of the person, including near and intermediate vision. In a particularly advantageous manner, the positions of the correction supports 3 can therefore be adjusted to make coincide, for each eye, the axis of the eye and the axis 52 of the viewfinder 5. The correction lens or glasses to be placed in the correction supports 3 are therefore also perfectly centered with respect to the eyes of the patient. With reference to the embodiment shown in FIG. 1, the device for measuring the subjective refraction also comprises a head support 7 so that the patient can place his head behind the correction supports 3. Typically, the head support 7 consists of a chin guard 71 and a structure 73 providing support to the front, the two structures 71, 73 being connected by a first fixed amount 75 and a second fixed amount 77. The amounts 75, 77 are fixed on a table. It is also possible to fix the uprights 75, 77 on a plate (not shown) so as to pivot the chin guard 71 and the support structure 73 of the front around the vertical axis at an angle e. It is also possible to tilt the head support structure 7 about a horizontal axis (not shown) so as to incline the head forward, the angle of inclination being, for example, 20 °. The chin and forehead support structures 71, 73 are sliding on the first and second uprights 75, 77 in order to be able to adapt their height to the morphology of the patient. As illustrated in FIGS. 1 and 2A, the correction supports 3 can be installed by means of a movable arm 39 pivotally on a third upright 80 that is independent of the head support 7. The correction supports 3 can pivot jointly around a horizontal axis, to be inclined with an angle of inclination y relative to the vertical (see Figure 2B), regardless of the position of the support 7 head. This allows the correction supports 3 to be well in front of the eyes of the person so that the axes of his eyes (or gaze) coincide with the axes of the viewers 5, regardless of the relative orientations of the head and eyes of the person. The angle is also called the pantoscopic angle of the correction supports 3. Referring to FIG. 1, the subjective refraction measuring device further comprises a reading support 9 arranged at a variable distance 10 and angle with respect to the correction supports 3. The reading support 9 is adapted to display the pattern. Advantageously, the subjective refraction measuring device comprises adjustment means for reducing the difference between the position of the correction supports 3 and a set position of the correction supports 3, the positions being relative to the pattern. By "position", it is necessary to understand both the distance and the inclination angle (pantoscopic angle) y of the correction supports 3 with respect to the pattern and the reading support 9 which displays it. The set position corresponds to a position (in terms of distance and angle) with respect to the pattern in which the person is looking perpendicularly through the corrective lenses placed in the correction supports 3 to see the pattern in a clear manner. . More precisely and with reference to FIGS. 1 and 2A, the correction supports 3 are provided with adjustment means 31 for adjusting their distance to the pupillary distance of the person (arrows a and b), means 33 for adjusting the height (arrow h) and adjustment means (not shown) of the angle of convergence α between the axes of the sights 5. The correction supports 3 further comprise adjustment means 35 for adjusting the inclination y of the supports 3 correction relative to the horizontal, and translation control means 37 in both horizontal directions (arrows x and y). The translation adjustment means 37 may consist of two translation plates 81, 83 able to translate the third upright 80 carrying the correction supports 3. The reading support 9 is also provided with adjustment means, as detailed below. Figures 4A and 4B show different views of the reading support 9 of the device according to a preferred embodiment of the invention. The reading support 9 comprises a plate 91 on which is arranged a display means 92 capable of displaying the pattern. The display means 92 may be an electronic display means, for example, a liquid crystal display or any other type of flat screen. The size of the display means is preferably at least about 2mm x 2mm to 20mm x 20mm for the central portion in near vision. A 20cm x 20cm display will include a peripheral portion and will be more suitable for longer intermediate vision distances. The advantage of an electronic display means is that the type, size and other characteristics of the displayed pattern can be varied or adapted in real time during use of the subjective refraction measuring device according to the invention. . For example, for a viewing distance of 40 cm, the displayed pattern, such as a letter, can be <1mm, for example, 0.8 mm. Around the display means 92 are arranged graphic signs or characters 93 (such as letters or numbers). The graphic signs 93 may be directly printed on the plate 91, or they may appear on a sheet of paper having a hole in the display means 92 and coming to rest or to be fixed on the plate 91. The characters 93 are significant. of the place on the plateau 91 where they are and thus allow to know the direction of the gaze of the person looking at the reading support 9. In order for the person to look at the display means 92, the position of the reading support 9 can be adjusted in translation and in rotation. As indicated by arrows (d, e, f) in FIG. 4A, the reading support 9 can in particular be translated in the perpendicular directions (d, e) to the direction of gaze.
    [0007] According to a preferred embodiment, the device comprises means for discriminating the two eyes. These means may, for example, be constituted by a pair polarizer-analyzer between the correction medium and the pattern. Display means 92 may include, for example, a polarized display, such as a liquid crystal display. Thus, it is possible to hide the view for one of the patient's eyes by turning a polarizer, placed for example in one of the correction supports 3, so that its main axis is perpendicular to the direction of polarization of the light waves issued by the screen. This makes it possible to measure the subjective refraction in near or intermediate vision for each eye independently, without mechanically covering the other eye. Thus, both eyes look at the target, but the pattern can be deciphered only by one eye at a time, which allows to measure acuity only one eye at a time while remaining in the conditions of a binocular gaze lowered normal. Alternatively, the discrimination means between the right eye and the left eye can be means usually used for stereoscopic vision, such as anaglyphs in combination with red and green glasses, electroshutters or screens. stereoscopic. It can also be considered directive filters such as "confidentiality filters" (proposed, for example, by 3M Company).
    [0008] According to other modes (not shown) advantageous embodiment of the device of the present invention, the means for determining the direction of gaze may include image acquisition and processing means. The image acquisition means may be constituted, for example, by a camera 92 placed on the reading medium 9, in place of the previously described pattern (see FIG. 4B). It is thus possible to determine the direction of the gaze, either by determining the center of rotation of the eye using scale markers on the correction supports or on the chinrest, or by determining the positions of the pupils by observing the reflections of light on the corneas. In the second case, the means for determining the gaze direction also comprise a light emitting means emitting in the direction of the person's eyes, for example a light-emitting diode (LED).
    [0009] According to a second aspect, the present invention relates to a method for measuring the subjective refraction of a person in close and / or intermediate vision. Advantageously, the method is implemented by means of a measuring device according to the embodiments described above. The method comprises the following steps. In front of each eye of the person, at least one correction lens corresponding to the prescription of the distance vision is set up by means of a correction medium. The correction supports 3 may be those described in relation to FIGS. 1 and 2A. It is thus possible to check the visual acuity in far vision. For the measurement of subjective refraction in far vision, the patient looks at a pattern displayed on a vertical plane or an optometric chart at about 5 to 6 m from the correction supports 3, typically straight in front of him. The correction supports 3 are not inclined relative to the vertical. The angle of convergence a between the two correction supports is adjusted to zero, the two correction supports 3 are therefore not tilted relative to each other. Indeed, as seen above, in far vision, the sighting distance is about 5 m to 6 m, the angle of convergence between the axes of the eyes is close to zero. According to the method of the invention, in front of each eye of the person, at least one correction lens corresponding to the prescription of near vision and / or intermediate vision is then put in place by means of the correction medium. According to this embodiment, for near vision, the correction support carries, at the end of the measurement, at least the following elements: correction in far vision (namely, the spherical and / or cylindrical correction), the so-called "addition" sphere correction lens for near vision, the so-called "addition" cylinder correction lens for near vision, and a viewfinder. In order to determine the direction of the gaze of the person and guide the gaze on the pattern, the viewfinder is placed in front of each eye of the person by means of the support 3 correction. The viewfinder is preferably a cylinder 5 as previously described in connection with FIG. 3A. The relative positions of the correction supports 3 are thus adjusted to converge the axes of the viewfinders. The positions of the correction supports 3 are adjusted to make coincide, for each eye, the axis of the eye and the axis of the viewfinder 5. Thus, when the gaze of the person is lowered in near vision, for example, the person's eyes remain perfectly centered with respect to the correction glass (s). The visual acuity of the person is then measured in close vision and / or in intermediate vision. The viewfinder can be removed to perform this measurement. For the measurement of the subjective refraction in close vision, the patient looks at the pattern on a reading support 9 placed preferably at about 40 cm from the correction supports 3. The reading support 9 may comprise a display means 92 as detailed with reference to FIGS. 4A and 4B. Referring to FIG. 4A, the distance between the reading support 9 and the correction supports 3 can be adjusted by translating the reading support 9 (in the direction indicated by the arrow e). Typically, the person lowers his gaze. This corresponds to the natural posture that a person takes in near vision, for example, for reading. In order for the person to look through the correction lenses, intended to be placed in the correction supports 3 in a perpendicularly centered manner, the correction supports 3 must be inclined in the same way as the eyes using the viewers 5, as described above. The angle of inclination y of the correction supports 3 is about 0 to 45 ° with respect to the vertical, and preferably about 36 °. Advantageously, the reading support 9 is also inclined with an angle f3 with respect to the vertical of approximately 0 to 45 °, and preferably approximately 36 °. In a preferred embodiment, the plane of the reading support 9 and the plane containing the correction supports 3 are substantially parallel to ensure good visibility of the pattern. In addition, the head support (7) can also be tilted for a more natural posture.
    [0010] For the measurement of the subjective refraction in intermediate vision, the patient looks at the pattern on the reading support 9 placed preferably at about 70 cm to 100 cm of the correction media 3. In a similar way to near vision, the person can lower his gaze without moving his head. This corresponds to the natural posture a person takes, for example, to do household chores or to look at a computer screen. The correction supports 3 must be inclined in the same way as the eyes using the sights 5, as described above. The angle of inclination y for the intermediate vision may be about twenty degrees relative to the vertical. The reading support 9 is also inclined with an angle f3 relative to the vertical. It is therefore necessary that the distance between the correction media 3 and the reading support 9 can be adjusted independently of the inclinations of the correction media 3 and the reading medium 9. Taking into account the lowering of the gaze of the person by the inclinations and the height of the reading support 9 and correction supports 3 also makes it possible to correctly evaluate the possible variation of the refraction in sphere or astigmatism of Indeed, as the eye turns slightly lower, the axis of the cylindrical correction is not the same for a straight look (far) and a lowered look (on a book, for example). The device and the method according to described embodiments make it possible to correctly determine the cylindrical correction necessary to design, for example, progressive corrective lenses that are perfectly suited to both distance vision, intermediate vision and near vision. According to a preferred embodiment of the method according to the invention, the step of measuring the visual acuity in near vision and / or in intermediate vision comprises the discrimination of the two eyes. In one example, the pattern is displayed on a liquid crystal display, and the step of measuring visual acuity comprises the following steps. A polarizer is placed in front of each eye of the person by means of the correction support. The first polarizer is set so that the pattern is visible to the first eye, and the second polarizer is set so that the pattern is invisible to the second eye. The pattern is visible when the main axis of the polarizer coincides with the polarization direction of the light waves emitted by the screen. The pattern is invisible when the main axis of the polarizer is perpendicular to the direction of polarization of the waves. Visual acuity in near vision and / or intermediate vision (the mode being determined by the distance of the pattern from the eyes) is then measured for the first eye. This process is repeated for the second eye.
    [0011] According to advantageous embodiments of the method of the invention, instead of using viewfinders as described above, the step of determining the direction of gaze can be performed by determining either the center of rotation of the eye (CRO ), or the positions of the pupils of the person.
    [0012] For the measurement of the CRO, the patient is positioned in a defined manner (for example, with a viewing distance of 40 cm and the view lowered by 36 ° from the horizontal). The patient looks at the center of the camera lens. Pictures are taken with different positions of the chin rest 71 and the forehead rest 73 (for example, with e = 0 °, 20 °, -20 °, see Figure 1 ). The pictures taken can then be analyzed to calculate the positions of the CROs relative to, for example, the chinrest 71 and the correction supports 3, the latter being advantageously equipped with scale markers. The correction supports 3 can then be positioned perpendicularly and centrally on the lines passing through the CROs and the center of the objective. For the measurement of the CROs, the photos can also be taken by several cameras or by a single mobile camera, the patient looking successively at the cameras and the chinrest remaining fixed. For the measurement of the positions of the pupils, the light reflection positions (emitted, for example, by an LED located on the reading support 9 and emitting in the visible or infrared spectrum) relative to the correction media 3 are observed, these the latter being equipped with patterns marking the centers of the correction supports 3. The patient is well positioned when the reflections are well centered in relation to the test patterns.
    [0013] Preferably, the method according to the invention further comprises the iterative adjustment, by means of adjustment means, of the position of the correction supports 3 to reduce the difference between the position of the correction supports 3 and a set position of the supports. 3 correction, the positions being relative to the pattern. As previously described, the correction supports 3 can be adjusted in height, in translation on the horizontal plane and with respect to each other to adapt their separation to the pupil distance of the patient, and again in a rotational or pivoting manner. . These settings can be manual or automated. Accordingly, and very advantageously, the determination of the direction of the gaze of the patient can thus be performed completely automatically. For example, the settings of the various parts of the head support 7, detailed above, as well as those of the correction media 3 can be determined and controlled by a computer provided with a dedicated interface and operated using means of motorized adjustment. The correction supports 3 can then be correctly aligned and centered with respect to the man's gaze axes in a safe, fast and efficient manner.
    权利要求:
    Claims (19)
    [0001]
    REVENDICATIONS1. Apparatus for measuring the subjective refraction of a person in close and / or intermediate vision, comprising: - for each eye of the person, a support (3) for correction equipped with at least one correction lens, the supports ( 3) being arranged so that the person looks through the lenses; characterized in that the position of each correction support (3) is variable to adjust an angle (a) between the axes of the lenses.
    [0002]
    2. Device according to claim 1, wherein the angle (a) between the axes of the lenses is adjustable between 0 ° and 30 °.
    [0003]
    3. Device according to one of claims 1 and 2, further comprising means (5) for determining the direction of gaze, so as to adjust the relative positions of the supports (3) correction to converge the directions of the gaze both eyes under an angle (a) of convergence, so as to guide the gaze of the person on a pattern.
    [0004]
    4. Device according to claim 3, wherein each support (3) correction is adjustable in inclination.
    [0005]
    5. Device according to one of claims 3 and 4, further comprising a support (9) for reading arranged at a distance and a variable angle relative to the supports (3) correction, the support (9) reading being intended to display the pattern.
    [0006]
    6. Device according to one of claims 3 to 5, wherein the means (5) for determining the direction of gaze comprise, for each eye, a viewfinder intended to be placed in front of the eye by means of the support ( 3) correction.
    [0007]
    7. Device according to claim 6, wherein the viewfinder comprises an input member and an output member adapted to be aligned in the direction of gaze between the eye and the target.
    [0008]
    8. Device according to one of claims 3 to 5, wherein the means (5) for determining the direction of gaze comprise means for acquiring and processing images.
    [0009]
    9. Device according to claim 8, wherein the means (5) for determining the gaze direction further comprises a light emitting means emitting in the direction of the eyes of the person.
    [0010]
    10.Dispositif according to one of the preceding claims, further comprising adjustment means for reducing the difference between the position of the supports (3) correction and a set position of the supports (3) correction, the positions being relative in the pattern, in which the set position corresponds to a position of the correction supports (3) in which the person looks centrally and perpendicularly through the lenses.
    [0011]
    11. Device according to one of the preceding claims, further comprising means for discriminating the two eyes.
    [0012]
    12. A method for measuring the subjective refraction of a person in close and / or intermediate vision, by means of a device according to one of claims 1 to 11, the method comprising a step of: - setting up, in front of each eye of the person by means of the support (3) of correction, at least one correction lens corresponding to the prescription of the near vision and / or intermediate; characterized in that the method further comprises the steps of: -variating the positions of the correction supports (3) to adjust an angle (a) between the axes of the lenses; and- determining the visual acuity of the person in close and / or intermediate vision.
    [0013]
    The method of claim 12, further comprising the steps of: determining the direction of gaze of both eyes; and -adjustment of the relative positions of the correction supports (3) in order to converge the viewing directions under a convergence angle (a) so as to guide the person's gaze on the pattern.
    [0014]
    14. The method of claim 13, wherein the step of determining the gaze direction comprises a step of placing, in front of each eye by means of the support (3) correction, the viewfinder.
    [0015]
    15. The method of claim 13, wherein the step of determining the direction of gaze comprises a step of determining the center of rotation of
    [0016]
    The method of claim 13, wherein the step of determining the direction of the gaze comprises a step of determining the positions of the pupils.
    [0017]
    17. Method according to one of claims 12 to 16, further comprising a tilting step of a plane containing the correction supports (3) for lowering the viewing directions at a pantoscopic angle (y).
    [0018]
    18. Method according to one of claims 13 to 17, wherein the step of measuring the visual acuity in near vision and / or intermediate comprises the following steps: - establishment of means of discrimination of both eyes ; and measuring visual acuity in near vision and / or intermediate vision for each eye independently.
    [0019]
    19. Method according to one of claims 12 to 18, further comprising an iterative adjustment step, by means of adjustment means, theposition of the supports (3) correction to reduce the gap between the position of the supports (3). ) of correction and a set position of the supports (3) correction, the positions being relative to the pattern, wherein the set position corresponds to a position of the supports (3) correction in which the person looks centrally and perpendicularly through the lenses.
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    同族专利:
    公开号 | 公开日
    EP3082567A1|2016-10-26|
    CN105828699B|2018-06-29|
    US20160309999A1|2016-10-27|
    EP3082567B1|2019-08-28|
    FR3014674B1|2016-02-05|
    US9955864B2|2018-05-01|
    AU2014369629B2|2019-05-09|
    JP6556133B2|2019-08-07|
    WO2015092244A1|2015-06-25|
    CN105828699A|2016-08-03|
    AU2014369629A1|2016-06-16|
    CA2932485A1|2015-06-25|
    JP2017500931A|2017-01-12|
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    法律状态:
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    2016-12-27| PLFP| Fee payment|Year of fee payment: 4 |
    2017-12-27| PLFP| Fee payment|Year of fee payment: 5 |
    2018-07-06| TP| Transmission of property|Owner name: ESSILOR INTERNATIONAL, FR Effective date: 20180601 |
    2019-12-26| PLFP| Fee payment|Year of fee payment: 7 |
    2020-12-27| PLFP| Fee payment|Year of fee payment: 8 |
    2021-12-27| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1362834A|FR3014674B1|2013-12-17|2013-12-17|DEVICE AND METHOD FOR MEASURING SUBJECTIVE REFRACTION|FR1362834A| FR3014674B1|2013-12-17|2013-12-17|DEVICE AND METHOD FOR MEASURING SUBJECTIVE REFRACTION|
    EP14827839.3A| EP3082567B1|2013-12-17|2014-12-15|Device and method for measuring subjective refraction|
    US15/105,932| US9955864B2|2013-12-17|2014-12-15|Device and method for measuring subjective refraction|
    PCT/FR2014/053335| WO2015092244A1|2013-12-17|2014-12-15|Device and method for measuring subjective refraction|
    CN201480068246.0A| CN105828699B|2013-12-17|2014-12-15|For measuring the device and method of subjective dioptric|
    AU2014369629A| AU2014369629B2|2013-12-17|2014-12-15|Device and method for measuring subjective refraction|
    JP2016536118A| JP6556133B2|2013-12-17|2014-12-15|Apparatus and method for measuring subjective refractive power|
    CA2932485A| CA2932485A1|2013-12-17|2014-12-15|Device and method for measuring subjective refraction|
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