JP5988801B2 - Spectacle lens design method and spectacle lens provision method - Google Patents

Description

The present invention relates to method for providing a design method and a spectacle lens of the eyeglass lens.

  Various technologies have been disclosed in designing and providing spectacle lenses, and one of them is to use eye gaze detection devices to match spectacle lenses with the subjective evaluation of the wearer and objective evaluation in the design. There is a method for measuring the movement of the line of sight during use.

In Patent Document 1, when designing a spectacle lens used to correct a refractive error, the eye movement path of the spectacle wearer is analyzed by software based on information from the eye movement measurement device, and the standard lens is corrected according to each eye. A technique for designing a spectacle lens is disclosed.
Moreover, in patent document 2, the visual motion pattern of a spectacle wearer is determined from the visual motion pattern in a well-known statistical analysis result using both or one of the head motion measuring device and the eye movement measuring device. In addition, a method for selecting a frame and a technique for recommending an optimal lens among several existing lenses are disclosed.

  In these examples, information on eye and head movement is measured by a head and eye movement measurement device, and this information is processed by software.

Special table 2008-521027 gazette Special Table 2003-523244

  However, it has not been clarified how the results of measuring the head and eye movements of individual wearers are reflected in optimizing the optical performance of the spectacle lens.

In view of the circumstances as described above, the present invention is based on the information obtained by the visual line detection device, the design method and the spectacle lens optimized eyeglass lenses optical performance based on the usage and features of the eye movement It aims at providing the offer method of.

According to a second aspect of the present invention, there is provided a spectacle lens design method having an outer surface that is a refractive surface on the object side in a worn state and an inner surface that is a refractive surface on the eyeball side in a worn state, the outer surface and the inner surface Determine the coordinates of the intersection of at least one lens surface and the eye's line of sight when looking at an object within an arbitrary distance range from the eye in the wearing state, and determine the line-of-sight information on the lens surface from the coordinates of the intersection Then, when optimizing the optical performance of the spectacle lens based on the line-of-sight information, calculating a distribution of intersections, converting from the distribution of intersections to a distribution of points corresponding to a fixed viewpoint or eye movements; Distributing evaluation points for detecting evaluation parameters for evaluating the optical performance on the spectacle lens, designating an evaluation area for each evaluation point distributed on the spectacle lens, and corresponding to a fixed viewpoint or eye movement in the evaluation area. Depending point are many included, to determine the weights for the evaluation parameter or optimization algorithm optical performance optimization for each evaluation point, and providing select a spectacle lens optical performance is optimum A method for designing a spectacle lens is provided.

According to a third aspect of the present invention, there is provided a spectacle lens having an outer surface that is a refractive surface on the object side in the wearing state and an inner surface that is a refractive surface on the eyeball side in the wearing state, the outer surface and the inner surface Determine the coordinates of the intersection of at least one lens surface and the line of sight of the eye when viewing an object within an arbitrary distance range from the eye in the wearing state, and determine the line-of-sight information on the lens surface from the coordinates of the intersection , Calculating a distribution of intersection points when selecting and providing a spectacle lens having an optimum optical performance based on the line-of-sight information from a plurality of existing designed spectacle lenses based on the line-of-sight information ; For each evaluation point distributed on the spectacle lens, the step of converting the distribution of the intersection points into a distribution of points corresponding to the fixed viewpoint or eye movement, and the evaluation points for detecting the evaluation parameters for evaluating the optical performance are distributed on the spectacle lens. Depending on the step of specifying the evaluation area and how many points corresponding to the fixation point or eye movement are included in the evaluation area, the optical performance evaluation parameter or the optimization algorithm weight to be optimized for each evaluation point is determined. A method for providing a spectacle lens, comprising: selecting and providing a spectacle lens having an optimal optical performance .

  According to the aspect of the present invention, the optical performance can be optimized based on the usage situation and the characteristics of eye movement based on the information obtained by the visual line detection device.

The schematic diagram which shows the whole structure of the spectacle lens design system which concerns on embodiment of this invention. The figure which shows the other structure of the gaze detection apparatus which concerns on this embodiment. The figure which shows the detection result in the gaze detection apparatus which concerns on this embodiment. The figure which shows the detection result in the gaze detection apparatus which concerns on this embodiment. The figure which shows the detection result in the gaze detection apparatus which concerns on this embodiment. The figure which shows the detection result in the gaze detection apparatus which concerns on this embodiment. The figure which shows the detection result in the gaze detection apparatus which concerns on this embodiment. The figure which shows the detection result in the gaze detection apparatus which concerns on this embodiment. The figure which shows the detection result in the gaze detection apparatus which concerns on this embodiment. The figure which shows the detection result in the gaze detection apparatus which concerns on this embodiment. The figure which shows the detection result in the gaze detection apparatus which concerns on this embodiment.

An embodiment of the present invention will be described.
In the following description, the unit of refractive power is represented by diopter (D) unless otherwise specified.

  In addition, in the following description, when “upper”, “lower”, “upper”, “lower”, etc. of a lens are described, when the lens is processed for spectacles, the lens when wearing spectacles is used. Based on the positional relationship.

  Also in the following drawings, the positional relationship (up / down / left / right) of the lens is the same as the positional relationship (up / down / left / right) with respect to the paper surface. Of the two refracting surfaces constituting the lens, the object side surface is referred to as an “outer surface” and the eyeball side surface is referred to as an “inner surface”.

  Although the present embodiment can be used for designing a single-focus or multi-focus spectacle lens 10, it is effective in a progressive-power lens in which the movement of the line of sight is likely to be limited depending on the distance from the eye of the object to be viewed. Easy to demonstrate.

  The progressive-power lens has a distance vision correction region (hereinafter referred to as “distance portion”) located above the lens and a near vision correction region (hereinafter referred to as “near portion”) located below the lens when worn. And a progressive region (hereinafter referred to as “intermediate portion”) in which the refractive power continuously changes between both regions.

  FIG. 1 is a schematic diagram showing a configuration of a spectacle lens design system 100 according to the present embodiment. As shown in FIG. 1, the spectacle lens design system 100 includes a spectacle lens 10, an information processing device 40, and a line-of-sight detection device 60.

  The spectacle lens 10 is held by the spectacle frame 20. The spectacle lens 10 has a lens surface 10c including an outer surface 10a that is a refractive surface on the object side in the wearing state of the subject and an inner surface 10b that is a refractive surface on the eyeball side in the wearing state.

  As the eyeglass lens 10, a test lens having a known optical performance is used.

  The information processing apparatus 40 includes a wireless communication unit 41, an input unit 42, a processing unit 43, a storage unit 44, and an output unit 45. For example, the wireless communication unit 41 receives a detection result wirelessly transmitted from the line-of-sight detection device 60. The input unit 42 is a part for inputting information to the information processing apparatus 40, and for example, a keyboard or a mouse is used.

  The line-of-sight detection device 60 detects the coordinates of the intersection with the line of sight of the eye when viewing an object within an arbitrary distance range from the eye in the wearing state. The line-of-sight detection device 60 includes a front view camera 61, an eyeball camera 62, an infrared LED 63, a headband 64, a dichroic mirror 65, and the like. In addition, the line-of-sight detection device 60 includes a communication unit 70 (not illustrated) that performs wired or wireless communication with the information processing device 40. As the visual line detection device 60, a commercially available head and eye motion measuring device, a modified version of the motion measuring device, or the like can be used.

  As such a line-of-sight detection device 60, for example, a device commercially available under the trade name “EMR-9” from NAC Image Technology and a trade name such as “ETL-400” and “RK-726PCT” from ISCAN. A commercially available apparatus can be used.

  Next, a design method for the spectacle lens 10 using the spectacle lens design system 100 will be described. In the present embodiment, the coordinates of the intersection point 10d between the line of sight and the spectacle lens 10 when the subject views the object through the spectacle lens 10 are calculated using the line-of-sight detection device 60, and the intersection calculated by the line-of-sight detection device 60 is calculated. Based on the coordinates of 10d, the use area and the line-of-sight information on the lens surface 10c are determined, and the optical performance of the spectacle lens 10 is optimized based on the determination.

FIG. 2 is a flowchart specifically illustrating a design method of the spectacle lens 10.
As shown in FIG. 2, the spectacle lens 10 is designed by a step (ST01) of obtaining line-of-sight information using the line-of-sight detection device 60, and the lens surface 10c of the eyeglass lens 10 from the line-of-sight information and the shape of the eyeglass lens 10 and the like. Calculating the distribution of the intersection of the line of sight and the line of sight (ST02), determining the solid angle corresponding to the fixation fine movement from the sampling interval (ST03), and the distribution of the intersection of the lens surface 10c from the solid angle corresponding to the fixation fine movement Conversion to fixation point distribution (ST04), evaluation point and evaluation region determination step (ST05), and evaluation point distribution / optical to be optimized depending on how many fixation points are distributed in the evaluation region A step of weighting performance and optimization (ST06) and a step of performing optimization calculation or selecting an optimal spectacle lens 10 (ST Has a 7), the. Hereinafter, steps ST01 to ST07 will be described in order.

  When designing the spectacle lens 10 using the spectacle lens design system 100, the subject can freely see the front field of view through the spectacle lens 10 and the dichroic mirror 64. At this time, the eyeball tracking camera 62 follows the movement of the eyeball of the subject while the subject's field of view image is acquired by the front vision camera 61.

  When a subject looks at an object using the eyeglass lens 10, it is considered that the influence of various line-of-sight information, particularly the movement of the line of sight and eye movement is large. It is thought that the eyeball is always in motion as long as it keeps looking at things. The eye movement when looking at an object is mainly divided into three types: eye movement, sliding eye movement, and impulsive eye movement.

  Fixation tremor is a minute movement that is performed unconsciously and constantly when gazing at a fixed point, and is considered to occur in order to keep the direction of the eyeball constant and to keep the image moving on the retina clear. It has been. Fixation tremor includes a trema with a frequency component of 30 Hz to 100 Hz at a viewing angle of about 15 seconds, a step-like or irregular motion flick of a viewing angle of about 20 minutes, and a viewing angle of about 5 minutes or less existing between flicks. It can be divided into three types of very slow motion drift.

  Sliding eye movement, also called pasto, is a continuous low-speed movement that occurs when the line of sight follows a moving object. The speed is usually about several degrees / second, and at most about 25-30 degrees / second. It is said. This movement cannot be consciously performed when the target object is stationary. Vestibulo-oculomotor reflexes and vergence movements caused by slow head movements are also smooth movements.

  Impulsive eye movements, also called saccades, are jumping and very fast movements. This happens when reading a book or when looking at various viewing objects one after another. The speed is said to reach 300 to 600 degrees / second. Flicking in fixation micromotion is also a jumping movement, also called microsaccade. The saccade also occurs when the tracking of the line of sight cannot keep up with the sliding eye movement or the vestibular movement reflex.

  Since it is considered that the region in which fixation micromotion frequently appears is a region that is mainly used, it is most important to optimize the optical performance of this region. Further, since the movement of the line of sight is frequently performed in an area where slidable eye movement or impulsive eye movement frequently appears, it is desirable to optimize the optical performance in accordance with the movement of the line of sight.

  In the present embodiment, a fixation point is introduced in order to apply for line-of-sight information by fixation micromotion. The fixed viewpoint is a point on the outer surface or inner surface of the lens that is determined to correspond to eye movement equivalent to fixation fine movement based on the distribution of the intersection point 10d between the outer surface or inner surface of the lens and the line of sight.

  In the present embodiment, first, line-of-sight information is detected by a commercially available line-of-sight detection apparatus such as the line-of-sight detection apparatus 60 (ST01). Next, by combining the results obtained from these apparatuses and information such as the surface shape of the spectacle lens 10 to be examined and the relative position of the eyeball and the lens, the coordinates of the intersection 10d between the lens surface 10c and the eye's line of sight are obtained. Calculate (ST02).

As data to be recorded, for example, when the line-of-sight detection device 60 is used under the conditions of time t [second] and sampling frequency a [Hz], the lens surface 10c and the line of sight with respect to the geometric center of the lens surface 10c are used. Are recorded as coordinates P1 (X1, Y1), P2 (X2, Y2),..., Pn (Xn, Yn). In this case, n is n = t × a
The sampling interval is 1 / a [second].

  FIG. 3 shows the intersection 10d distribution of the lens surface 10c and the eye line of sight calculated using the line-of-sight detection device 60 at a certain time when an object is viewed using a progressive power lens as the spectacle lens 10. FIG. A portion indicated by a plurality of white circles (◯) in FIG. 3 is the calculated intersection point 10d.

  Based on the sampling interval 1 / a [second], a solid angle centered on the rotation point of the eyeball corresponding to the fixation fine movement is determined. In this case, it may be determined with reference to the size of generally reported fixation tremors, or the size of characters in books, magazines, etc. that are often seen in actual usage situations and everyday life. It may be determined from the above.

  Then, a range corresponding to fixation fine movement centering on the coordinates Pk (Xk, Yk) of an arbitrary intersection 10d is determined from the solid angle, the relative position information of the lens and the eyeball, the shape of the lens surface 10c, and the like (ST03). .

  This range is a complicated shape depending on the shape of the lens surface 10c, and may impose a burden on the calculation process. Therefore, it is preferable to accurately determine the range corresponding to fixed fine movement, but it may be determined in a simplified manner. As an example of simplified determination, for example, an ellipse shape calculated using a solid angle corresponding to microscopic fixation, a distance from the eyeball to the lens surface 10c, and coordinates of the intersection point 10d of the line of sight may be used.

  FIG. 4 is a schematic diagram for determining a range corresponding to fixation fine movement on the lens surface 10c of the spectacle lens 10. FIG. In FIG. 4, symbol О is the geometric center of the lens surface 10c, symbol R is the rotation point of the eyeball, symbol S is a solid angle centered on the eyeball rotation point corresponding to fixation fine movement, and symbol A is a range corresponding to fixation fine movement. Is shown.

  As shown in FIG. 4, the lens surface 10c has a complicated shape in the case of a progressive-power lens, and therefore does not necessarily have an elliptical shape. However, depending on the amount of movement due to fixation fine movement and the sampling frequency, even if it approximates an elliptical shape, there is no significant effect.

  Next, the distribution of the intersection 10d of the lens surface 10c is converted from the solid angle corresponding to the fixation fine movement to the distribution of the fixed viewpoint (ST04). Specifically, an intersection point Pk-1 (Xk-1, Yk-) that is continuous in time with respect to Pk is within a range corresponding to fixation fine movement centering on Pk (Xk, Yk) determined as described above. If 1) and Pk + 1 (Xk + 1, Yk + 1) are within the range, Pk (Xk, Yk) is set as the fixed viewpoint FPm + 1 (Xk, Yk).

  However, the value of m is 0 before processing, and increases by 1 each time it is determined as a fixed viewpoint. The value of m represents the total number of fixation points at the time of processing. By performing the above processing on all the sample points, the distribution of intersections 10d between the lens surface 10c and the line of sight is converted into a distribution of fixed viewpoints. In this case, m ≦ n, and the distribution of the fixed viewpoint is a distribution obtained by thinning out from the intersection 10d distribution.

  FIG. 5 is a diagram showing an example in which the distribution of the intersection 10d in FIG. 3 is converted into the distribution of the fixed viewpoint 10e. As shown in FIG. 5, it can be seen that the distribution is biased in the vicinity of the meridian in the vertical direction above and below the lens surface 10c.

  In the above conversion processing to the fixation point 10e, the example in which only the intersection 10d before and after the specific sample point is temporally continuous has been described. However, the present invention is not limited to this and is used for the determination by the sampling interval or the like. The number of samples before and after can be changed.

  Further, when the visual line detection device 60 obtains viewing angle data instead of coordinates, the distribution of the fixation point 10e on the lens surface 10c can be determined by performing the same processing. In the present embodiment, the spectacle lens 10 with optimized optical performance is designed or selected based on the distribution of the fixation point 10e.

  Next, an example of a method for designing the spectacle lens 10 with optimized optical performance based on the distribution of the fixation point 10e will be described. In the design of the spectacle lens 10, evaluation points for detecting evaluation parameters for optical performance are distributed on the spectacle lens 10, and the values of the evaluation parameters at these evaluation points are changed to desired values while changing the shape of the lens surface 10c. (ST05).

  In this case, the glasses to be designed depend on how the evaluation points are distributed, what optical performance evaluation parameters are assigned to each evaluation point, and what algorithm is used for optimization processing. The optical performance of the lens 10 is determined.

  Therefore, in the present embodiment, the optimization of the optical performance based on the line-of-sight information can be realized by combining the distribution of the fixation point 10e, the distribution of the evaluation points, the evaluation parameter of the assigned optical performance, and the like. There are various methods for combining the distribution of the fixation point 10e and the evaluation point distribution / evaluation parameters of the optical performance, and any method may be used.

  For example, an evaluation area is designated for each evaluation point distributed on the spectacle lens 10, and depending on how many fixation points 10e are included in the evaluation area, determination or optimization of an evaluation parameter of optical performance to be optimized for each evaluation point The algorithm can be weighted (ST05).

  FIG. 6 shows an example in which evaluation points 10 f are distributed on the spectacle lens 10. In this example, the distribution is made in the form of a square lattice at equal intervals. However, the distribution is not limited to this, and any distribution may be used as long as it is sufficient for designing and evaluating the spectacle lens 10. .

  FIG. 7 is an example in which the evaluation area 10g targeted for the evaluation point 10f in FIG. 6 is determined and displayed for each evaluation point 10f.

  In this example, the evaluation region 10g is a circular region having the same area, but is not limited to this, and a region having a different area / shape is set for each evaluation point 10f. It does not matter. In this configuration, it is also possible to optimize the optical performance by reflecting the distribution of the fixed viewpoint 10e in the design.

  FIG. 8 is a diagram in which the distribution of the fixation point 10e in FIG. 5 and the evaluation area 10g in FIG. 7 are superimposed. FIG. 9 is a diagram in which an evaluation area 10g including the distribution of the fixation point 10e is extracted. In this way, by evaluating the optical performance by limiting the evaluation point 10f in accordance with the distribution of the fixed viewpoint 10e, it is possible to design a lens that optimizes the optical performance at the time of fixation.

  As another combination method, in addition to the distribution of the evaluation area based on the evaluation point 10f, when a progressive power lens is assumed on the spectacle lens 10, for example, a distance portion, an intermediate portion, a near portion, etc. It is also possible to weight the evaluation parameters or the optimization algorithm of the optical performance of the evaluation points 10f included in each evaluation region depending on how distributed the fixation point 10e is in each evaluation region.

  FIG. 10 shows the distribution of evaluation points 10f, the distance portion (F1 to F3), the intermediate portion (P1 to P3), the near portion (N1 to N3), the left side (F1, P1, N1), the center (F2, It is the figure which showed the example which divides | segments an evaluation area | region with P2, N2), right side (F3, P3, N3). Similar to the example illustrated in FIG. 6, the distribution of the evaluation points 10 f may be any distribution. Further, the method of dividing the evaluation area is not limited to that shown in FIG.

FIG. 11 is a diagram in which the distribution of the fixation point 10e in FIG. 5 and the evaluation area diagram in FIG. 10 are combined.
As shown in FIG. 11, only the evaluation point 10f in the evaluation region including the fixation point 10e is set as an evaluation target when the optical performance is optimized, so that the optical performance at the time of fixation is optimized. The lens can be designed (ST07). Moreover, the aspect which selects the optimal lens by evaluation from the existing some spectacle lens 10 may be sufficient.

  For optimization of optical performance, for the evaluation points determined as described above, for example, line-of-sight information such as the distribution of intersection points on the surface of the spectacle lens 10 and the trajectory of intersection points with time, or the object from the eye The weight of the evaluation parameter or the optimization algorithm is determined from the distance to the target, the type of the object, or the surface shape of the spectacle lens 10, and the optical performance is optimized.

  As described above, it is possible to design a lens with optimized optical performance based on the distribution of the fixation point 10e.

  An example of a method for selecting the spectacle lens 10 with optimized optical performance based on the distribution of the fixation point 10e will be described. When evaluating the optical performance of the existing spectacle lens 10, evaluation points for detecting an evaluation parameter of the optical performance are distributed on the spectacle lens 10 as in the case of designing, and the optical performance is evaluated for each evaluation point. The parameter value is calculated and evaluated based on the numerical value.

  At that time, the distribution of the evaluation point 10f and the optical performance evaluation parameter to be calculated are determined by the distribution of the fixation point 10e. The determination method is the same as the above design method. Then, by comparing the evaluation parameters of the optical performance for each evaluation point 10f with the spectacle lens 10 to be compared, it is possible to select the spectacle lens 10 having the optimum optical performance with respect to the distribution of the fixed viewpoint 10e.

  As with the case of the above-mentioned fixation fine movement, the sliding eye movement and the impulsive eye movement can be converted from the intersection 10d distribution on the lens surface 10c from the solid angle corresponding to each eye movement. In addition, regarding a point that is not the fixed viewpoint 10e in the distribution of intersection points 10d, it may be determined which movement is to be performed from the amount of movement with respect to the sampling interval or the usage status. As described above, the distribution corresponding to each motion can be determined in the same manner as the distribution of the fixed viewpoint 10e, and the optical performance can be optimized.

  Furthermore, the optical performance to be optimized can be determined by combining the distributions of the three eye movements. For example, even if it is necessary to optimize the optical performance for all movements for the same evaluation point, the weighting of the evaluation given to each movement at the evaluation point is changed depending on the distribution ratio, or the optical performance to be emphasized is selected. can do.

  Examples of the optical performance of the spectacle lens 10 optimized in the present embodiment include astigmatism, average refractive power, distortion, and the like in transmitted light, but are not limited thereto. In areas where fixation tremors frequently appear, it is considered to be a commonly used area, so it is possible to provide a clear visual field by correcting spherical power and astigmatism. .

  In an area where the eyeball often performs sliding eye movement from one point to another, the dwell time of the line of sight is short between the two points, so the amount of variation in spherical power and astigmatism accompanying the movement of the line of sight If suppressed, it is considered that there is an effect of improving the visual appearance associated with the sliding eye movement.

  In an area where the eyeball often performs impulsive eye movements from one point to another, detailed visual recognition of an object between two points is not performed, and it is considered that a rough shape can be recognized. If the distortion between the two points is corrected, it is considered that there is an effect of improving the appearance according to the impulsive eye movement.

  The dominant eye is also called the dominant eye, and corresponds to the eye that is used unconsciously when it is required to use one of the eyes. When viewing with both eyes, it is thought that the dominant eye gazes at the object and the non-dominant eye vaguely captures the background.

  Therefore, the distributions of the fixation points 10e for both eyes are compared in synchronism, and if the two disagree with each other, the fixation point 10e having the disagreement of the non-dominant eye is removed or the fixation point of the dominant eye is removed. By changing according to the distribution of 10e, it is possible to obtain the distribution of the fixed viewpoint 10e according to the actual use state of the spectacle lens 10, and to design and select the spectacles having the optimum optical performance.

  As described above, the spectacle lens 10 according to the present embodiment is the spectacle lens 10 having the outer surface 10a which is a refractive surface on the object side in the wearing state and the inner surface 10b which is a refractive surface on the eyeball side in the wearing state, and the outer surface 10a and the inner surface. The coordinates (intersection coordinates) of the intersection 10d between at least one lens surface 10c of 10b and the line of sight of the eye when viewing an object in an arbitrary distance range from the eye in the wearing state are determined, and the intersection Since the line-of-sight information on the lens surface 10c is determined from the coordinates, and the optical performance is optimized based on the line-of-sight information, the spectacle lens 10 is optimized in accordance with the use situation and the characteristics of eye movement. Can be provided.

  The design method of the spectacle lens 10 according to the present embodiment is a design method of the spectacle lens 10 having an outer surface 10a that is a refractive surface on the object side in the wearing state and an inner surface 10b that is a refractive surface on the eyeball side in the wearing state. Determining the coordinates (intersection coordinates) of the intersection 10d between at least one lens surface 10c of the outer surface 10a and the inner surface 10b and the line of sight of the eye when viewing an object in an arbitrary distance range from the eye in the wearing state; Since the line-of-sight information on the lens surface 10c is determined from the intersection coordinates, and the optical performance of the spectacle lens 10 is optimized based on the line-of-sight information, according to the usage situation of the wearer and the characteristics of the eye movement. The spectacle lens 10 having the optimum optical performance can be designed.

  According to the third aspect of the present invention, there is provided a design method for an eyeglass lens 10 having an outer surface 10a that is a refractive surface on the object side in the wearing state and an inner surface 10b that is a refractive surface on the eyeball side in the wearing state. And the coordinates (intersection coordinates) of the intersection point 10d between at least one lens surface 10c of the inner surface 10b and the line of sight of the eye when viewing an object in an arbitrary distance range from the eye in the wearing state, and the intersection point coordinates Then, the line-of-sight information on the lens surface 10c is determined, and based on the line-of-sight information, the eyeglass lens 10 having the optimum optical performance based on the line-of-sight information is selected from among the plurality of existing designed eyeglass lenses 10. Since it was decided to provide, the spectacle lens 10 provided with the optimal optical performance according to the use condition of the wearer and the feature of the eye movement can be provided.

  In addition, based on the determination, by selecting and providing the spectacle lens 10 having the optimum optical performance based on the line-of-sight information from among a plurality of existing designed spectacle lenses 10, characteristics of use conditions and eye movements are provided. Thus, it is possible to provide the spectacle lens 10 with the optical performance optimized based on the above.

The technical scope of the present invention is not limited to the above-described embodiment, and appropriate modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, a progressive lens has been described as an example of the spectacle lens 10, but the present invention is not limited to this.

  For example, the spectacle lens 10 may be configured to use a single focal spherical lens, a single focal aspheric lens, or the like. In particular, since the distortion of the field of view becomes large in a single focus spherical lens having a high degree, the aspect of this embodiment is effective.

  Further, the configuration of the line-of-sight detection device 60 is not limited to the type that is mounted on the subject's head as shown in FIG. The present invention can be applied to, for example, a stationary type as long as it is a system that optically measures the movement of the eyeball of the subject.

DESCRIPTION OF SYMBOLS 10 ... Eyeglass lens 10a ... Outer surface 10b ... Inner surface 10c ... Lens surface 10d ... Intersection 10e ... Fixed viewpoint 10f ... Evaluation point 10g ... Evaluation area 20 ... Eyeglass frame 40 ... Information processing device 60 ... Eye-gaze detection device 100 ... Eyeglass lens design system

Claims (8)

A spectacle lens design method having an outer surface that is a refractive surface on the object side in a wearing state and an inner surface that is a refractive surface on the eyeball side in a worn state,
Determining the coordinates of the intersection of at least one lens surface of the outer surface and the inner surface and the line of sight of the eye when viewing an object in an arbitrary distance range from the eye in a worn state;
From the coordinates of the intersection , determine line-of-sight information on the lens surface,
When optimizing the optical performance of the spectacle lens based on the line-of-sight information ,
Calculating a distribution of the intersection points;
Converting the distribution of the intersections into a distribution of points corresponding to a fixed viewpoint or eye movement;
Distributing evaluation points for detecting an evaluation parameter for evaluating the optical performance on the spectacle lens, and designating an evaluation region for each evaluation point distributed on the spectacle lens;
Depending on how many points corresponding to the fixation point or eye movement are included in the evaluation region, an evaluation parameter or an optimization algorithm of the optical performance to be optimized for each evaluation point is determined, and the optical performance A method of designing an eyeglass lens including the step of optimizing . The line-of-sight information on the lens surface includes fixation point information on the lens surface, information on impulse eye movement of the eyeball, information on sliding eye movement of the eyeball, and whether or not the target eye is a dominant eye The method of designing a spectacle lens according to claim 1 , comprising at least one piece of information regarding the eyeglass lens. The line-of-sight information on the lens surface includes fixation point information on the lens surface,
Fixation point information on the lens surface, prior Symbol intersection, involuntary eye movement equivalent solid angle of the eyeball around the rotation point of the eye, the shape of the lens surface, and the relative positions of the eye and the spectacle lens The spectacle lens design method according to claim 2 , wherein the spectacle lens design method is determined based on at least one of the information. The optical performance, astigmatism in the transmitted light, the average refractive power, the design method of a spectacle lens according to claim 1, any one of claims 3, including at least one of distortion. A method for providing a spectacle lens having an outer surface which is a refractive surface on the object side in a wearing state and an inner surface which is a refractive surface on the eyeball side in a wearing state,
Determining the coordinates of the intersection of at least one lens surface of the outer surface and the inner surface and the line of sight of the eye when viewing an object in an arbitrary distance range from the eye in a worn state;
From the coordinates of the intersection , determine line-of-sight information on the lens surface,
Based on the line-of-sight information, when selecting and providing the spectacle lens with the optimum optical performance based on the line-of-sight information from among a plurality of existing designed eyeglass lenses ,
Calculating a distribution of the intersection points;
Converting the distribution of the intersections into a distribution of points corresponding to a fixed viewpoint or eye movement;
Distributing evaluation points for detecting an evaluation parameter for evaluating the optical performance on the spectacle lens, and designating an evaluation region for each evaluation point distributed on the spectacle lens;
Depending on how many points corresponding to the fixation point or eye movement are included in the evaluation area, an optical performance evaluation parameter or an optimization algorithm weight to be optimized for each evaluation point is determined, and the optical performance is Selecting and providing the spectacle lens that is optimal . The line-of-sight information on the lens surface includes fixation point information on the lens surface, information on impulse eye movement of the eyeball, information on sliding eye movement of the eyeball, and whether or not the target eye is a dominant eye The method for providing a spectacle lens according to claim 5 , comprising at least one piece of information relating to the eyeglass lens. The line-of-sight information on the lens surface includes fixation point information on the lens surface,
Fixation point information on the lens surface, prior Symbol intersection, involuntary eye movement equivalent solid angle of the eyeball around the rotation point of the eye, the shape of the lens surface, and the relative positions of the eye and the spectacle lens The method for providing spectacle lenses according to claim 6 , wherein the spectacle lens is determined based on at least one of the information. The method for providing a spectacle lens according to any one of claims 5 to 7 , wherein the optical performance includes at least one of astigmatism, average refractive power, and distortion in transmitted light.

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