JP2011197556A - Designing method of spectacle lens and selection method of spectacle lens or lens data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a designing method of a spectacle lens capable of objectively evaluating sensations of individual users to reflect the evaluation to lens designing.SOLUTION: In a reference evaluation value calculation process, first visual content is visually observed by a plurality of subjects, and in this process, brain waves are measured and a reference evaluation value is calculated from the measurement results. In a specific evaluation value calculation process, the first visual content is visually observed by a wearer similarly, and brain waves are measured and a specific evaluation value is calculated from the measurement result. In a specific sensation value calculation process, a specific sensation value is calculated based on the reference evaluation value and the specific evaluation value. In a lens shape decision process, a shape correction is given to a base design, wherein an association relationship with the reference evaluation value is set previously, based on the specific sensation value, and a suitable lens shape of a spectacle lens relating to an index, for example, "easiness of accustoming to vibrations" in a wearing subject is decided.

Description

  The present invention relates to a spectacle lens design method and a spectacle lens or lens data selection method.

For example, as disclosed in Patent Document 1, in general, a lens manufacturer obtains prescription data for producing a spectacle lens of a user (wearer) from a spectacle store as a client, designs and processes the spectacle lens, and stores the spectacle store. To supply. It is desirable for lens manufacturers to produce and provide optimal spectacle lenses suitable for users who have more prescription data reflected in lens design. Examples of prescription data to be reflected include PD, apex distance, optic axis length, corneal curve, lens warp angle, forward tilt angle, and eye movement related to personal eye information, skeleton, and frame information. Proposals have been proposed.
A spectacle lens is usually designed by a simulation process and an evaluation process thereof. In the simulation process, an eyeball model and a lens shape are constructed by a computer simulation by a computer, a light beam passing through the lens is evaluated, and the lens shape is optimized so that the evaluation result approaches a target value. Based on the design values designed in the simulation process, an evaluation target lens is actually manufactured, and optical measurement, shape confirmation, and monitor wearing evaluation are performed in the evaluation process. Then, the result of the evaluation process is fed back to the target value of the simulation process to improve the design. Patent Documents 2 and 3 give examples of the prior art disclosed for the spectacle lens design method and evaluation.

JP 2008-191516 A JP 2006-72192 A JP-T-2006-506667

As mentioned above, simulation and evaluation are performed based on prescription data to optimize the production of the optimal spectacle lens. In the past, there has been a problem of how to incorporate the individual differences into lens design.
For example, if there are multiple users with the same lens design and similar fitting conditions, and therefore common conditions that there is no difference in computer simulation, some users may not have any spectacle lenses designed under those conditions. There may be cases where other users cannot get used to even though there is no problem.
Such cases are not a problem of lens characteristics alone, but are largely due to mismatches with user characteristics.For example, for users who tend to be concerned about distortion, aspherical lenses have a shallow lens curve. It tends to lead to discomfort. Also, it is a user who is also apt to be worried about distortion and is a so-called hard type design with a progressive lens that has a wide field of vision with little aberration, so it is characterized by discomfort in wearing, and blurring is a concern. The feature is that the user who says that it is easy to become a person complains of wearing discomfort with the soft type design opposite to the hard type.
Such a difference in user characteristics is similar to, for example, that there are people who are prone to motion sickness and those who are difficult to get motion sickness, and how the individual feels even with the same stimulus becomes important. In addition to the above ease of use, the degree to which the user feels the same lens design is different depending on the individual. Therefore, the feeling of the individual user should be an important factor for the lens design.
However, in the past, it was mainly based on the question and information on the lens type that had been applied until then, and the lens was selected subjectively through trials using temporary frames and test lenses. Was not necessarily fully incorporated into the lens design.
The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a spectacle lens design method and spectacle lens or lens data selection method that can objectively evaluate a user's individual feeling and reflect it in the lens design.

  In order to solve the above-mentioned problem, in the invention of claim 1, a plurality of subjects are allowed to visually observe the first visual content for stimulating the sensibility through the visual senses of characters, figures, images, videos, etc. A reference evaluation value calculating step of measuring predetermined biological information of a person, and calculating a reference evaluation value of an evaluation scale for a predetermined index in the first visual content based on a plurality of obtained measurement values; While the visual content or the first visual content is different from the first visual content, the subject (hereinafter referred to as a wearing subject) is allowed to visually observe the second visual content that corresponds to the reference evaluation value in the reference evaluation value calculation step. The predetermined biological information of the wearing subject is measured along with the visual observation, and the predetermined index in the first visual content is measured based on the measured value. A unique evaluation value calculating step of calculating a unique evaluation value of the wearing subject of the evaluation scale, a unique sensitivity value calculating step of calculating a unique sensitivity value calculated from the reference evaluation value and the unique evaluation value, and the reference evaluation in advance A suitable spectacle lens relating to the predetermined index in the wearing subject is given a shape correction based on the unique sensitivity value obtained in the unique sensitivity value calculation step with respect to the base design in which the correspondence relationship with the value is set. The gist of the present invention is that it comprises a lens surface shape determining step for determining the lens surface shape.

Further, the gist of the invention of claim 2 is that, in addition to the configuration of the invention of claim 1, the base design is a design corresponding to the reference evaluation value.
In addition, in the invention of claim 3, in addition to the configuration of the invention of claim 1 or 2, when measuring the first or second visual content, it gives more sensitivity than the first or second visual content. The gist is to measure together the base visual content with a small stimulus, and use the difference between them as a measurement value.
In addition to the configuration of the invention according to any one of claims 1 to 3, the gist of the invention of claim 4 is that the predetermined biological information is an electroencephalogram.
Further, in the invention of claim 5, in addition to the structure of the invention of any one of claims 1 to 3, the predetermined biological information is the amount of oxygenated hemoglobin, the amount of deoxygenated hemoglobin and the total amount of hemoglobin in the brain blood. The gist is that it is at least one selected.

In addition to the configuration of the invention according to any one of claims 1 to 5, the invention of claim 6 is characterized in that the spectacle lens is a progressive addition lens.
Further, the invention of claim 7 is characterized in that, in addition to the configuration of the invention of any one of claims 1 to 5, the spectacle lens is an aspherical lens.
Further, in the invention of claim 8, in addition to the configuration of the invention of any one of claims 1 to 7, the wearing subject is a spectacle lens purchase applicant, and the measurement of the biological information is performed by a spectacle lens retailer or an ophthalmologist. The gist is to be implemented.
In addition, in the invention of claim 9, in addition to the configuration of the invention of any one of claims 1 to 8, the unique evaluation value calculation step is executed on biological information measured at a spectacle lens retail store or an ophthalmologist. The gist of the invention is to transmit the evaluated value to a lens processing place via communication and execute the lens surface shape determination step at the lens processing place.
Further, in the invention of claim 10, in addition to the structure of the invention of claim 9, the biological information measured at the spectacle lens retail store or the ophthalmologist is transmitted to the lens processing place via communication, and at the lens processing place. The gist of this is to execute the lens surface shape determination step.

In the eleventh aspect of the present invention, the first visual content that gives a stimulus to sensibility through visual perception such as characters, diagrams, images, or video is made to be viewed by a plurality of subjects, and predetermined biological information of each person is accompanied by the visual inspection. A reference evaluation value calculation step of calculating a reference evaluation value of an evaluation scale for a predetermined index in the first visual content based on the plurality of measurement values obtained; and the first visual content or the first visual content The second visual content that is different from the first visual content but has been associated with the reference evaluation value in the reference evaluation value calculation step is caused to be visually observed by the wearing subject as the wearer, Measurement of predetermined biological information, and based on the measured value, the characteristic of the wearing subject of the evaluation scale regarding the predetermined index in the first visual content The correspondence between the unique evaluation value calculation step for calculating the value, the unique sensitivity value calculation step for calculating the unique sensitivity value calculated from the reference evaluation value and the unique evaluation value, and the reference evaluation value in advance is clear. A plurality of lenses or lens data having different lens surface shapes are prepared, and a lens or lens data having a lens surface shape suitable for a wearing subject is selected based on the unique sensitivity value obtained in the unique sensitivity value calculation step. The gist of this is that it comprises a lens selection step.
According to the twelfth aspect of the invention, the wearing subject is allowed to visually observe the first visual content for stimulating the sensibility through the visual senses of characters, figures, images, videos, etc., and predetermined biological information of the wearing subject is accompanied by the visual observation. Is obtained as a sensory response value that can indicate a ground state when a stimulus is not felt, and a criterion of an evaluation scale relating to a predetermined index in the first visual content based on the sensory response value A reference evaluation value calculating step for calculating an evaluation value, and causing the wearing subject to visually check the second visual content having a smaller stimulus to the sensibility than the first visual content. Measure biometric information, and obtain the measurement result as the sensitivity response value that can indicate the ground state when the stimulus is not felt. Then, a comparative evaluation value calculating step for calculating a comparative evaluation value of an evaluation scale for a predetermined index in the second visual content, and the reference evaluation value calculated in the reference evaluation value calculating step is a value having a predetermined magnitude or more The second visual content when it is determined in the first determination step that the reference evaluation value has reached a predetermined value or more in the first determination step. A second determination step of determining whether or not the sensory response value is within a predetermined allowable range including a ground state in which no stimulus is felt with respect to a predetermined index, based on the comparative evaluation value, When it is determined that the evaluation value is not within the allowable range in the determination step, the visual content having a smaller stimulus that gives sensitivity than the second visual content is referred to as the new second visual content. The comparative evaluation value calculation step is executed, and on the other hand, if it is determined that the comparative evaluation value is an evaluation value within a predetermined allowable range, an evaluation value related to an evaluation scale of the predetermined index prepared in advance The gist of selecting the lens or lens data having a lens surface shape suitable for the wearing subject from the plurality of lenses or lens data having different lens surface shapes and corresponding to each other based on the comparative evaluation value. And

Further, in the invention of claim 13, in addition to the structure of the invention of claim 12, the predetermined index is ease of getting used to blur, and a lens having a different power is replaced as a means for giving a stimulus difference of visual contents. The gist is to use it.
In addition, in the invention of claim 14, in addition to the configuration of the invention of any one of claims 11 to 13, when measuring the first or second visual content, it is more than the first or second visual content. The gist is to measure together the base visual content with a small stimulus given to the sensibility, and to set the difference between them as a measured value.
In addition to the configuration of the invention according to any one of claims 11 to 14, the gist of the invention of claim 15 is that the predetermined biological information is an electroencephalogram.
Further, in the invention of claim 16, in addition to the configuration of the invention of any one of claims 11 to 14, the predetermined biological information is the amount of oxygenated hemoglobin, the amount of deoxygenated hemoglobin and the total amount of hemoglobin in the brain blood. The gist is that it is at least one selected.

The gist of the invention of claim 17 is that in addition to the structure of any of claims 11 to 16, the spectacle lens is a progressive addition lens.
The gist of the invention of claim 18 is that, in addition to the configuration of the invention of any of claims 11 to 16, the spectacle lens is an aspherical lens.
Further, in the invention of claim 19, in addition to the configuration of the invention of any one of claims 11 to 18, the subject is a spectacle lens purchaser, and the measurement of the biological information is carried out at a spectacle lens retailer or an ophthalmologist. The gist is to be done.
In addition, in the invention of claim 20, in addition to the configuration of the invention of any one of claims 10 to 19, the reference evaluation value calculation step and the unique evaluation value calculation for biological information measured at a spectacle lens retail store or an ophthalmologist The gist is that the process is executed.
Further, in the invention of claim 21, in addition to the structure of the invention of claim 20, the gist is that the biological information measured by the spectacle lens retail store or the ophthalmologist is transmitted to the lens processing place through communication. To do.

In the configuration as described above, as a first solving means (corresponding to claim 1), first, in the reference evaluation value calculation step, a plurality of subjects visually observe the first visual content, and a predetermined living body of each person is accompanied by visual observation. Measure information. Then, a reference evaluation value of an evaluation scale relating to a predetermined index in the first visual content is calculated based on the obtained plurality of measurement values.
The first visual content is content that stimulates sensibilities through visuals such as characters, diagrams, images, or videos. The visual contents are characters, diagrams, images, videos, etc., and may be two-dimensional or three-dimensional. In addition, in the case of giving a stimulus by an illusion, an illusion that the image feels moving may be given even if it is a fixed still image or the like.
As the number of subjects, the larger the number, the more preferable. However, since it is difficult even if there are too many, it is preferable to measure at least about 20 to 30 people with respect to the group of subjects that can be regarded as the same. The subject group that can be regarded as the same is, for example, a plus power wearer group and a minus power test subject group when the tendency of the wearer's stimulation differs depending on the plus power and the minus power. This group of subjects may be divided according to age, or may be divided according to spectacle lens specification scenes.

Examples of biological information include the subject's brain wave, oxygenated hemoglobin amount in brain blood, deoxygenated hemoglobin amount, total hemoglobin amount, myoelectric potential, eye movement, blink, body temperature, heart rate, blood pressure, sweating action, in saliva Biometric information that is assumed to have a correlation with sensibility due to components or the like is assumed. First, it is assumed that a change in the biological information is measured by a measuring device to obtain a predetermined numerical value (measured value). In measurement, each person may be measured once or a plurality of times and averaged. Here, taking an average is not only a mathematical average but also a concept including taking out a common vector component from a plurality of measurement results in a principal component analysis or the like to obtain a result. The measurement value of the biological information cannot be understood what the measurement value means as it is. In other words, since the relationship with the lens is not expressed as a numerical value, it is necessary to orient the measured value. In the present invention, first, an “index” is set. Here, “indicator” refers to, for example, the state of sensitivity when wearing a lens such as “ease of getting used to shaking”, “ease of getting used to blur”, and “favorable sensitivity to see clearly” It is a standard to do. Then, by setting an evaluation scale that is a kind of rule for a predetermined index in such biological information, data that can be applied to the lens is calculated by calculating an evaluation value that is quantified as a standard human sense about the evaluation scale. Shall be created. Here, it is assumed that a standard evaluation value of a standard person is obtained based on measurement values of a plurality of subjects.
Further, when measuring the first visual content, it is preferable to measure together the base visual content having a smaller stimulus to the sensibility than the first visual content, and use the difference between them as a measurement value. This is because it is possible to cancel the measurement value in the normal state where the stimulus of the measurer is not given, so that a more accurate measurement value can be obtained. The measurement is preferably repeated and averaged.
As a method for setting an evaluation scale for a predetermined index, for example, principal component analysis, independent component analysis, a learning algorithm, or the like can be used. Even if an evaluation scale corresponding to a predetermined index is set, an automatically obtained evaluation scale may be selected. In the case of simple calculation, the first visual content is calculated from the difference between the result of measuring the first visual content and the result of measuring the base visual content with less stimulus given to the sensibility than the first visual content. It is also possible to calculate the direction of the measurement result when given as a stimulus and obtain an evaluation scale.

Next, in the unique evaluation value calculation step, an evaluation value unique to the subject on an evaluation scale in a predetermined index when the first visual content is viewed with respect to the wearing subject wearing the lens is calculated. In this case, it is common for the wearing subject to visually check the first visual content that is the premise for calculating the reference evaluation value. However, if it can be replaced with the same evaluation scale, the first visual content is different from the first visual content. It is also possible to make the wearing subject's unique evaluation value by allowing the wearing subject to visually observe the visual content of 2 and correcting the obtained evaluation value.
When measuring the first or second visual content, it is preferable to measure together the base visual content that has a smaller stimulus to the sensibility than the first or second visual content, and use the difference between them as a measurement value. . This is because it is possible to cancel the measurement value in the normal state where the stimulus of the measurer is not given, so that a more accurate measurement value can be obtained. The measurement is preferably repeated and averaged.
Next, in the unique sensitivity value calculation step, the unique evaluation value is calculated by comparing the unique evaluation value of the wearing subject with the reference evaluation value. That is, a ratio of how much the wearing subject feels objectively compared with the reference evaluation value at a predetermined index in the first visual content is quantified as a unique sensitivity value.

Next, in the lens surface shape determination step, for the base design in which the correspondence relationship with the reference evaluation value is set, correction of the lens shape based on the unique sensitivity value is given, and the suitable for the predetermined index in the wearing subject The lens surface shape of a spectacle lens is determined. That is, the amount of change corresponding to the unique sensitivity value is synthesized with the base design. Here, in the lens shape correction based on the unique sensitivity value for the base design, each point of the lens of the base design is defined as a base design vector, and a lens shape correction vector corresponding to the reference evaluation value is defined. When the vector is synthesized with the base design vector according to the unique evaluation value, it is easy to calculate.
In addition, it is preferable that the base design is a design corresponding to the reference evaluation value in terms of simplifying the calculation. This means that the measurement value obtained when the biometric information of a person suitable for the index of the base design lens is the reference evaluation value.

In the present invention, as a second solving means, it is possible to employ a lens selection step instead of the lens surface shape determination step after the unique evaluation value calculation step (corresponding to claim 11).
A lens or lens data having a lens surface shape suitable for the wearing subject is selected from lenses or lens data having different lens surface shapes prepared in the lens selection step based on the unique sensitivity value. These lenses are lenses that have a clear correspondence with evaluation values relating to the evaluation scale of a predetermined index in advance. “Lens or lens data” may be a large number of lenses prepared in advance and stocked, and if desired, lens data corresponding to the unique sensitivity value is selected and new based on the data. This means that it may be prepared.
The suitable lens surface shape varies depending on the index. For example, it is preferable that “sway” and “blur” are as follows.
(I) In the case of “not easy to get used” in the evaluation of “easy to get used to shaking” In the case of a progressive lens, it is preferable to set the basic progressive surface to an aberration dispersion type and set the lens curve deeply. As a result, the lens shake can be reduced as compared with the normal case.
In the case of an aspheric lens, it is preferable to set the lens curve (spherical approximate curve on the lens surface) deeply and set the amount of the aspheric surface to be slightly larger than the normal condition of the lens curve. As a result, the lens shake can be reduced as compared with the normal case.
(Ii) In the case of “easily accustomed evaluation” in the evaluation of “easy to get used to shaking” If the lens is a progressive lens, the basic progressive surface is set to a base design or an aberration concentration type rather than the base design. The lens curve is preferably set shallower than (i). Thereby, the lens can be made thinner than usual, and the clear vision area of the progressive lens can be widened.
In the case of an aspheric lens, it is preferable to set the lens curve shallow and set the amount of the aspheric surface under the normal condition of the lens curve. Thereby, the lens can be made thinner than usual.
(Iii) When “ease of getting used to blur” is evaluated as “ease of getting used” If the lens is a progressive lens, it is preferable that the basic progressive surface be an aberration dispersion type. This allows a lens with less distortion than usual.
In the case of an aspherical lens, it is preferable to set the amount of aspherical surface to be a relatively large amount and to design with an emphasis on improving astigmatism (astigmatic difference). As a result, the lens can generally be made somewhat thin, and astigmatism aberration errors in the periphery of the lens can be reduced.
(iv) In the case of “not easy to get used” in the evaluation of “ease of familiarity with blur” In the case of a progressive lens, it is preferable that the basic progressive surface be an aberration concentrated type. Thereby, the clear vision area of the progressive lens can be widened.
In the case of an aspheric lens, it is preferable to design an aspheric amount with an emphasis on improvement of field curvature. Thereby, it can be set as a design with few errors of the frequency to the lens periphery.
For example, when a wearer of an aspheric lens has a low intrinsic sensitivity value compared to the standard evaluation value for a sense of blur, a permutation about blur is evaluated as “it is harder to get used to blur than general” A lens (or lens data) suitable for a person who is more difficult to get used to the “blur” than the general lens is adopted. Specifically, for “blur”, lenses (or lens data) having slightly different characteristics of curvature of field (and astigmatism) by fine adjustment of curvature of field and astigmatism (distance) as described above. Is prepared in advance, and a suitable one is adopted according to the unique sensitivity value.
That is, a plurality of lenses (or lens data) are designed by gradually changing elements of the lens surface shape that can affect a predetermined index, and selected according to the unique sensitivity value of the wearer. .

In the present invention, as a third solving means (corresponding to claim 12), in the reference evaluation value calculation step, the wearing subject examines the first visual content, and the predetermined biological information of the wearing subject is obtained along with the visual observation. taking measurement. The measurement result is acquired as a sensitivity response value that can indicate the ground state when no stimulus is felt. In other words, by replacing the state that does not feel the stimulus with the emotional response value that can be expressed as an objective numerical value, even if the measurement result of the wearing subject alone is based on the state that does not feel the stimulus, the state according to the stimulus Can be objectively quantified. First, a reference evaluation value of an evaluation scale related to a predetermined index in the first visual content is calculated based on a sensitivity response value.
Next, in the comparative evaluation value calculation step, the second visual content having a smaller stimulus to be given to the sensibility than the first visual content is caused to be visually observed by the wearing subject, and a sensitivity reaction value is obtained in the same manner as described above, and an evaluation scale relating to a predetermined index The comparative evaluation value is calculated.
Then, in the next first determination step, it is determined whether or not the reference evaluation value has reached a value greater than or equal to a predetermined magnitude.
If the reference evaluation value is greater than or equal to a predetermined magnitude, in the next second determination step, the second visual content is a sensitivity response value within a predetermined allowable range including a ground state in which no stimulus is felt with respect to a predetermined index. Is determined based on the comparative evaluation value. This step is a step of determining whether a stimulus of a certain magnitude reacts greatly with respect to a predetermined index, but the response is reduced as the stimulus becomes smaller and the influence on the sensitivity has reached a level where there is no problem. is there.
In this determination, it is desirable that the wearing subject is not affected by the stimulus in the stimulation by the second visual content. If it is determined that the sensitivity is affected, the stimulation given to the sensitivity is small. The comparative evaluation value calculation step is repeated with the visual content as the new second visual content.
On the other hand, if the stimulus of the second visual content does not affect (or allow) the sensitivity of the wearing subject, a lens or lens data having a lens surface shape suitable for the wearing subject is obtained based on the comparative evaluation value at that time. select. These lenses are lenses that have a clear correspondence with evaluation values relating to the evaluation scale of a predetermined index in advance. “Lens or lens data” may be a large number of lenses prepared in advance and stocked, and lens data is selected based on the comparative evaluation value as desired and new data is created based on the data. This means that it may be prepared.

In the above description, the predetermined index is ease of getting used to blur, and it is preferable to use a lens having a different power as a means for giving a stimulus difference of visual contents. This is because the lens power can change the focal position of the light beam that reaches the retina of the eye, so the relationship with the degree of blur is clear and it is easy to establish a correspondence with the evaluation value.
Also, when measuring the first or second visual content, measure the base visual content that is less sensitive to the sensibility than the first or second visual content, and use the difference between them as a measurement value. Is preferred. This is because it is possible to cancel the measurement value in the normal state where the stimulus of the measurer is not given, so that a more accurate measurement value can be obtained. The measurement is preferably repeated and averaged.

When the wearing subject is an eyeglass lens purchase applicant, the measurement of biological information is preferably performed at a spectacle lens retailer or an ophthalmologist.
In addition, it is preferable that the biological information measured at the spectacle lens retail store or the ophthalmologist is transmitted to the lens processing place via communication, and the lens surface shape determining step is performed at the lens processing place. Here, “communication” refers to data transmission in a communication network (VAN (value added communication network), Internet, WAN (Wide Area Network), etc.) using a terminal computer, and a sheet describing measurement results by facsimile. It is a concept that includes such cases widely. “Lens processing place” means, for example, a lens processing workshop or a lens manufacturer.
Further, the unique evaluation value calculation step is performed on the biological information measured at the spectacle lens retail store or the ophthalmologist, and the obtained unique evaluation value is transmitted to the lens processing place through communication. It is preferable to perform a lens surface determination process.
In this way, the biological information of the eyeglass lens purchase applicant or the data of the evaluation value is transmitted to the lens processing location via communication, the lens surface shape is determined by the lens surface determination step, and the lens having the lens surface shape is manufactured. Thus, it is possible to manufacture a spectacle lens suitable for the spectacle lens purchase applicant and provide it to the spectacle lens purchase applicant.

  In the inventions of the above-mentioned claims, since it is possible to objectively evaluate the feeling of individual users, it is possible to design a lens having a custom-made lens surface shape reflecting the evaluation result.

The front view of the sample chart used for Example 1 of this invention. 1 is a block diagram illustrating an electrical configuration of an electroencephalogram measurement apparatus used in Example 1. FIG. Explanatory drawing explaining arrangement | positioning of the electroencephalogram detection head electrode of an electroencephalogram measurement apparatus. The flowchart explaining the flow of the evaluation method using an electroencephalogram measurement apparatus. (A) in Example 1 is an aberration distribution diagram of a base design lens, (b) is a lens aberration distribution diagram in which (a) is corrected for a wearer who is likely to be wobbled, and (c) is less susceptible to wobbling. The aberration distribution figure of the lens which corrected (a) about the wearer. Explanatory drawing explaining the design method of a lens surface. The front view of the gazing point used for Example 2 of the present invention. Explanatory drawing explaining the measuring method in Example 2. FIG. (A) And (b) is a characteristic graph explaining the characteristic of a curvature of field and astigmatism. FIG. 6 is a block diagram illustrating an electrical configuration of a near-infrared spectrometer used in the third embodiment. FIG. 6 is a schematic diagram of a probe used in Example 3. Explanatory drawing explaining the state which mounted | wore the test subject with the cuff with which the probe was attached. The flowchart explaining the flow of the evaluation method using a near-infrared spectroscopy apparatus. The graph explaining the measurement result of a probe. The characteristic graph explaining the characteristic of a field curvature and astigmatism explaining the design at the time of matching the field curvature with the test subject F in a lens peripheral part.

Specific embodiments of the present invention will be described below with reference to the drawings.
Example 1
1. Regarding the index In the first embodiment, the sensitivity as an index is set to “ease of getting used to shaking”, and stimulation is given using the sample chart 1 as shown in FIG. In Example 1, the stimulation was based on the state of feeling the shaking. The sample chart 1 is composed of a gazing point 2 and dots 3 randomly arranged around the gazing point 2. By rotating the gazing point 2 in one direction around the gazing point 2, a sense of shaking due to an illusion is caused.
A state in which the dots around the gazing point 2 are not rotated at all is regarded as a state in which the stimulus to shake is zero, and a stimulus for a shake of a predetermined magnitude is given by rotating for a certain rotation speed for a certain time. Regarding the setting of the rotation speed and the rotation time, the result obtained by obtaining the relationship between the condition and the stimulus intensity from a large number of measurement results in advance is used.
Note that this visual content that gives a shake is not particularly limited to the sample chart 1, and may be an image that is swayed by waves on a ship, or a motion that is still image. You may use the “moving illusion” that you feel.

2. About the electroencephalogram measurement apparatus In the first embodiment, an electroencephalogram was used as a source of evaluation value calculation. Other biometric information can also be used. The electroencephalogram measurement apparatus used in the first embodiment has an electrical configuration as shown in FIG. The electroencephalogram detection head electrode 11 is a well-known device used, for example, for medical purposes. In this embodiment, the 10 electrodes, the ground electrode G, and the reference electrode according to the international 10-20 electrode positions shown in FIG. Is provided. The electroencephalogram detection head electrode 11 is attached to the subject's head to detect an electroencephalogram. The amplifier 12 amplifies the brain wave detected by the head electrode 11 and reduces noise by a built-in filter circuit. The measured electroencephalogram is output to the analysis computer 13. The analysis computer 13 includes a CPU (central processing unit) 14, a storage device 15, and peripheral devices. The CPU 14 performs an arithmetic process on the electroencephalogram measurement data to calculate various evaluation values and calculates a unique sensitivity value. The storage device 15 stores a basic program such as a program for controlling the operation of the CPU 14 and an OA processing program (for example, a Japanese input function or a printing function) that manages functions that can be commonly applied to a plurality of programs. ing. Furthermore, a program for taking in electroencephalogram measurement data, a program for performing arithmetic processing on electroencephalogram measurement data, and the like are stored. An input device 16 (mouse, keyboard, etc.) and a monitor 17 are connected to the CPU 14.

3. Measurement of EEG to Calculation of Evaluation Value An evaluation method using an electroencephalogram measurement apparatus will be described with reference to FIG.
First, the brain wave detection head electrode 11 is attached to the subject. Then, the subject is allowed to visually observe the sample chart 1 as the two states of the base stimulus and the target stimulus, and repeats the measurement a predetermined number of times while changing the condition of the target stimulus, and the reference evaluation value based on the data The sample chart 1 (FIG. 1) that is not rotated by the base stimulus for calculating the visual point 2 is visually observed. In the target stimulus, the gazing point 2 is visually observed while rotating the random dots 3 at a predetermined rotation speed. In the first embodiment, the measurement is performed while giving a sense of shaking as the target stimulus. However, the measurement may be started after gazing at the index for a certain time, and the recovery process of how to feel the shaking may be measured. . The measurement is repeatedly performed a predetermined number of times (5 times in the first embodiment). The measurement time is preferably about 10 to 120 seconds. In Example 1, the measurement time is 60 seconds. In the sample chart 1 of the first embodiment, the target stimulus can be set stepwise by changing the rotation speed of the random dots 3 or changing the rotation time. Then, in addition to the base stimulus, a target stimulus having a stimulus amount “large”, a stimulus amount “medium”, and a stimulus amount “small” is given in a random order, and an electroencephalogram is measured.
A total of 30 data groups of 3 types of target stimulation conditions × 5 times of measurement × 2 (for base stimulation) are obtained from one subject. In setting the reference evaluation value, a predetermined number of people are acquired for this data group. The larger the number of subjects, the better, but in this Example 1, 30 people were used. Next, fast Fourier transform is performed on the data group obtained for each person to calculate the power spectrum of the θ wave, α wave, and β wave, the principal component analysis is performed on the power spectrum data group, and the main group related to the target stimulus is calculated. The component vector M is calculated, and the average of the principal component coefficients in the case of the stimulus amount “large”, the stimulus amount “medium”, and the stimulus amount “small” is obtained. It normalizes so that it may be set to 1.0 and the state of a base stimulus = 0, and let the normalized result be an evaluation value of each target stimulus. In Example 1, as a result of this calculation, the stimulus amount “large” = 1.0, the stimulus amount “medium” = 0.6, and the stimulus amount “small” = 0.4. From these evaluation values, the target stimulus between the stimulus amount “medium” and the stimulus amount “small”, for example, the stimulus with the evaluation value 0.5 is set as a new stimulus amount “medium” stimulus, and this is used as a standard evaluation. Set with value. The target stimulus at this time is expected to be an evaluation value of 0.5 by a standard person, but it is arbitrary which evaluation value is set as the reference evaluation value.
The fast Fourier transform, power spectrum calculation, and principal component analysis are well known and will not be described in detail. In addition, the calculation method of the electroencephalogram data is an example, and there are no limitations on the method because many methods are known.

Next, a specific evaluation value is obtained for a subject A. The unique evaluation value is the same as when the reference evaluation value is obtained, and after mounting the head electrode, repeat the base stimulus and the target stimulus that becomes the reference evaluation value with a standard person (for example, four times). Give EEG measurement. And the intrinsic | native evaluation value about the test subject A can be calculated | required by comparing the difference of the obtained target stimulus measurement result and the base stimulus measurement result with the principal component vector M at the time of calculating the said reference | standard evaluation value. In the first embodiment, the unique evaluation value of the wearer A is obtained as 0.2.
In Example 1, the following two types of evaluation values were obtained.
(1) Reference evaluation value expected as a result when a target stimulation amount of “medium” is given to a large group (that is, a standard person) (2) For a certain wearer A (1) The unique evaluation value when the stimulus of the same condition is given Note that the standard evaluation value for a large number of people was measured in this example, but if it can be obtained once as a general-purpose evaluation value, the same index (here, “sway”) Can be diverted, it is not necessary to measure each time.

4). Calculation of Unique Sensitivity Value Next, the unique sensitivity value of the wearer A is calculated based on each evaluation value.
This is the ratio of the unique evaluation value to the reference evaluation value, and how much the wearer A feels the target stimulus with respect to the standard human target stimulus ("shake" in the first embodiment). A positive value indicates that the target stimulus is more habituated than the standard, and a negative value indicates that the target stimulus is less habituated than the standard. In the first embodiment, the wearer A has a calculation result of a specific evaluation value 0.2 and a specific sensitivity value (0.5−0.2) /0.5=0.6 with respect to the reference evaluation value 0.5. It was. Here, similarly to the wearer A, a wearer B and a wearer C who have calculated unique evaluation values and unique sensitivity values are assumed. As a result, it is assumed that the unique evaluation value 0.8 and the unique sensitivity value −0.6 are obtained for the wearer B, and the unique evaluation value 0.5 and the unique sensitivity value 0.0 are obtained for the wearer C. In this case, the wearer A is a wearer who is less worried if the fluctuation is about a medium stimulus, and the wearer B is a wearer who is likely to be worried even if the fluctuation is a medium stimulus. Can be interpreted as a general feeling of shaking for a "medium" stimulus.

5. Design of new lens surface shape based on evaluation value and unique sensitivity value Next, an example of a method for creating a design suitable for the unique sensitivity value of the wearer based on the evaluation value and the unique sensitivity value will be described. In Example 1, it is assumed that the wearer needs a progressive lens, and the base design has the aberration distribution performance shown in FIG. That is, this is an example in which the base design drawing 5 (a) is preferable for the most standard person, and in this case, the design is adapted to the subject according to the uniqueness value.
For example, in the case of the wearer C having a unique sensitivity value of 0.0, it can be determined that the feeling of shaking is the same as a general level. Therefore, there is no design change and the base design in FIG. In addition, the wearer A has a unique sensitivity value of 0.6, and is less likely to feel fluctuation than a general level (0.0). For example, (0.5−0.2) /0.5×100=60% is added to the shape change vector Tv prepared corresponding to the target stimulus in advance for the design of FIG. The design as shown in (c) is preferable. By doing in this way, it is suitable for the wearer A who can take a wider clear visual field than the state of Fig.5 (a), and a shake does not become a problem easily. In addition, the wearer B is a wearer who tends to be worried about the shake because the unique sensitivity value is −0.6. Therefore, the shape change vector Tv prepared in advance is added to, for example, (0.5−0.8) /0.5×100=−60%, that is, 60% in the reverse direction, as shown in FIG. The design is preferred.
Here, when the evaluation value is positive, the shape change vector Tv is changed, and when the evaluation value is negative, the shape change vector Sv is changed according to the deviation from the basic design. May be.
Furthermore, it is preferable to change the lens curve together with the change of the basic progressive surface. This is because the lens becomes thicker as the lens curve becomes deeper, but the distortion and distortion are reduced, so the lens curve becomes larger when the vibration becomes easier to feel, and the lens curve becomes smaller when the vibration becomes harder to feel. It is. For example, when the wearer A to the wearer C have a frequency of about S-4.00D, the wearer C curves the approximate spherical curve of the surface, which is a basic design condition, for example, 2.0, and the wearer A shakes. Since it is difficult to feel, the curve is set to a 1.5 curve with a slightly shallow curve.

  The shape change vector Tv given to the basic design is, for example, as shown in FIG. 6 assuming that the three-dimensional position of each point (a1, a2, a3,..., An) of the lens is clear. This is the difference deformation amount Tv (Ts1, Ts2, Ts3,..., Tsn) applied to each point (a1, a2, a3,..., An). Here, the shape change vector Tv may be a difference sag at each point of the lens, a difference prism, or a difference frequency. The shape change vector Tv (Ts1, Ts2, Ts3,..., Tsn) has a predetermined reference size as described above. be able to. The CPU 14 uses a value obtained by multiplying the three-dimensional position of each point (a1, a2, a3,..., An) previously input as data by the shape change vector Tv and the intrinsic sensitivity value as a correction value. By giving to each point (a1, a2, a3,. The shape change vector Tv is set as a set with the base design on the assumption that the unique sensitivity value is 1.0.

  In the above, the evaluation value and the unique sensitivity value are collected, for example, at a spectacle lens retail store or an ophthalmologist, and the biological information or the evaluation value and / or the unique sensitivity value obtained in each evaluation value calculation step is used as communication means such as the Internet The lens surface determination process is carried out by the lens manufacturer or the like based on the evaluation value and / or the unique sensitivity value. By doing in this way, the objective sensibility obtained from the measurement of the biological information of the eyeglass lens purchaser who is the subject can be reflected in the design.

The configuration of the first embodiment has the following effects.
(1) It is possible to objectively measure how easily the wearer feels personally by measuring the brain waves, and to provide an optimal lens for the wearer with respect to this index. It becomes possible.
(2) By giving a shape change vector according to the unique sensitivity value to the basic design and designing a new lens surface, it is possible to easily realize an optimum design according to the sensitivity value in a custom-made manner. Can do.

(Example 2)
In Example 2, the subject is a person who has sufficient adjustment power to focus on the target at the far point, and the result of objective measurement of the ease with which subject D is familiar with the blur is reflected in the aspheric lens design.
1. About the index In the second embodiment, the sensitivity of the index is “ease of getting used to blur”, and the gaze point obtained by randomly switching the direction of the gaze point 18 composed of the Landolt ring as shown in FIG. 8, a trial lens 19 in which a predetermined plus power is added to the lens power of the subject is placed just in front of the eyeball of the subject as shown in FIG. 8, and the far point distance L of the subject is set as the gaze point 18 and the wearer. By setting the distance between the subjects, the subject was blurred. At a distance farther than the far point distance L, the image is blurred. The strength of the stimulus that senses blur is designed to determine how much the far point distance is set with respect to the distance between the wearer and the index, i.e., how much power is positive with respect to the lens power of the base condition. It can be adjusted depending on what you do. The target stimulus is the state where the specified image is blurred, and the base stimulus that does not feel blur is the same as the wearer's power on the trial frame, or the plus distance is added to the wearer's power and the far point distance is increased. Realized by being on the indicator.
The image used as the index may be a landscape image other than the Landolt ring, and is not particularly limited. However, a gaze point may be provided to prevent measurement noise due to eye movement, or the index image may be displayed after the gaze point is displayed. preferable.

2. About the electroencephalogram measurement apparatus The same electroencephalogram measurement apparatus as that of the first embodiment is used in the second embodiment.
3. Measurement of electroencephalogram to calculation of evaluation value The method of obtaining the reference evaluation value in the second embodiment is the same as that in the first embodiment. The plus power added to the lens power of the subject as the target stimulus is, for example, S + 3.00D when the stimulus amount is “large”, S + 1.75D when the stimulus amount is “medium”, and S + 0. The brain wave is measured according to FIG.
First, the brain wave detection head electrode 11 is attached to the subject. Then, the subject is made to visually observe the gazing point 18 through the trial lens, and the measurement of both the target stimulus and the base stimulus is continuously repeated following the closed eye rest measurement 30 seconds. The number of repetitions was set to 4 in Example 2. Thereafter, the measured data is converted into a power spectrum, and the result is subjected to principal component analysis or the like, whereby the principal component vector M2 and the reference evaluation value can be obtained. Since the calculation is the same as in Example 1, the details are omitted. However, by this measurement, S + 1.00D is obtained as a target stimulus that gives a reference evaluation value as a new stimulus amount “medium”, and the reference evaluation value at that time is 0. .5.

Next, a case where a specific evaluation value is obtained for a subject D will be described. The specific evaluation values are also similar to those in FIG. 4. After the head electrode is mounted, the base stimulus and the target stimulus serving as the reference evaluation value are repeatedly given (for example, four times) by a standard person following the closed eye rest measurement for 30 seconds. Measure. Then, the difference between the obtained target stimulus and the base stimulus is taken as a measurement result, and compared with the principal component vector M2, the inherent evaluation value of the subject D is 0.9.
In Example 2, the following two types of evaluation values were obtained.
(1) Reference evaluation value expected as a result when a target stimulation amount of “medium” is given to a large group (that is, a standard person) (2) For a certain wearer D (1) Unique evaluation value calculated under the same conditions as

4). Calculation of Unique Sensitivity Value Next, the unique sensitivity value of the wearer D is calculated based on each evaluation value. The calculation method of the uniqueness value is the same as that of the first embodiment, and the uniqueness value 0.8 is obtained from the unique evaluation value 0.9 and the reference evaluation value 0.5 of the subject D.
These values are evaluation values of ease of use with respect to the relative blur of the wearer D with a standard person. Here, as with the wearer D, a wearer E who has calculated the unique evaluation value and the sample evaluation value is assumed. As a result, for the wearer E, it is assumed that the unique sensitivity value -0.5 is obtained. In the second embodiment, the evaluation value (reference evaluation value) of 0 is standard, when the evaluation value is positive, the ease of using the blur is low, and when the evaluation value is negative, the user is used to the blur. Indicates that it is easy. That is, the wearer D is a type that is relatively worried about blur, and the wearer E can be interpreted as a wearer who does not care much about blur.

5. Design of New Lens Surface Shape Based on Evaluation Value and Intrinsic Value Example 2 is an example in which a wearer needs an aspheric lens. When the lens powers of the wearers D and E are, for example, S-4.00D, the wearer D is relatively worried about blurring, and thus the field curvature is corrected relatively well up to the lens periphery. The design as shown in (a) is preferable. On the other hand, the wearer E is a type that does not bother blurring so much, and as shown in FIG. 9B, a design that reduces astigmatism (astigmatism) while generating curvature of field at the periphery of the lens. This is preferable. In the second embodiment, a large number of lenses (or lens data) having different characteristics of field curvature and astigmatism are prepared little by little in advance, and lenses (or lens data) having optimum characteristics according to the unique sensitivity values are prepared. select. That is, the design in FIG. 9A is lens data of a lens prepared when the lens power is S-4.00D and the unique sensitivity value is 0.8, and the design in FIG. 9B has the lens power. This is lens data of a lens prepared when S-4.00D and the unique sensitivity value is −0.5.
Similarly to the first embodiment, the shape change vector can also be designed by adding it to the lens shape when the evaluation value is 0 (principal component value 0). Further, the design target value may be changed based on the evaluation value.
As in the first embodiment, the evaluation value and the unique sensitivity value may be collected at a spectacle lens retail store or an ophthalmologist, for example.
By configuring in this way, in Example 2, it is possible to measure the ease of getting used to blur as an index objectively by measuring the electroencephalogram of how the individual wearer feels. It is possible to provide an optimal lens for a person.

(Example 3)
In Example 3, while the electroencephalogram was used as the source of evaluation value calculation in Examples 1 and 2, the measured value of the oxygenated hemoglobin amount in the cerebral blood was used.
1. About the index In the third embodiment, the sensitivity as an index is the same as in the second embodiment, and “ease of getting used to blur” is set. As the index, the gaze point 18 in which the direction of the Landolt ring in FIG. 7 is randomly switched is used, and a trial lens is disposed in the same manner as in the second embodiment, and the gaze point 18 is blurred with the far point being larger than the index. I have to. Further, in the third embodiment, when the direction (for example, left) designated for the direction (cut) of the Landolt ring is displayed, a problem of stressing the sensitivity of pressing a button is performed. When the task of pressing the button is given, the subject concentrates and looks at the index, and it becomes easier to show in the measurement result that the subject appears to be blurred under the target stimulus condition. The definition of the target stimulus and the base stimulus and how to set them are the same as in the second embodiment.
It is possible to use the same visual content as in the second embodiment.

2. Near-infrared spectroscopic device for measuring oxygenated hemoglobin in blood In Example 3, the amount of oxygenated hemoglobin in blood at an activated site in the brain is measured by a near-infrared spectroscopic device. When a specific part of the brain is activated, the blood flow to that part increases and the total amount of hemoglobin increases. Further, when a specific part of the brain is activated, the amount of oxygenated hemoglobin increases at the activated part, and the amount of deoxygenated hemoglobin decreases. Therefore, the lens is evaluated by measuring the amount of oxygenated hemoglobin in the blood at the activation site in the subject's brain using the physiological phenomenon.
The near-infrared spectrometer in Example 3 has an electrical configuration as shown in FIG.
As shown in FIG. 11, the probe 21 includes an LED light source 22 serving as a light projecting unit and a photosensor 23 serving as a light receiving unit. Near-infrared light is irradiated from the LED light source 22 toward the inside of the living body, and light that has been transmitted through the living body, scattered, and attenuated is detected by the photosensor 23. In the second embodiment, as shown in FIG. 12, measurement is performed by wearing a cuff 24 having four probes 21 in the horizontal direction and two probes 21 in the vertical direction so as to cover the human prefrontal cortex. To do. The prefrontal cortex is the part of the brain that controls mental activities related to the control of memory, emotions and behavior. Therefore, it becomes a place where the difference in appearance through the lens is reflected in the brain in the form of an increase or decrease in the amount of oxygenated hemoglobin.
Near-infrared light measured by the probe 21 is output to the analysis computer 25. The analysis computer 25 includes a CPU (central processing unit) 26, a storage device 27, and peripheral devices. Further, the analysis computer 25 includes an input device 28, a monitor 29, and the like. Since these descriptions are based on the analysis computer 13 of the first embodiment, detailed descriptions thereof are omitted.

3. Measurement of oxygenated hemoglobin in blood to calculation of evaluation value Next, an evaluation method using a near-infrared spectrometer will be described with reference to FIG.
First, as shown in FIG. 12, a cuff 24 to which a probe 21 is attached is attached to a subject (wearer F) so that near infrared light is emitted from the LED light source 22 toward the brain.
Next, let the subject visually observe the gazing point 18 through the trial lens (S + 3.00D), and repeat the measurement with the eyes closed (about 30 seconds) and the evaluation task measurement (30 seconds) for both the target stimulus and the base stimulus. The amount of oxygenated hemoglobin, the amount of deoxygenated hemoglobin, and the total amount of hemoglobin in the brain blood were measured. The number of repetitions was set to 4 in Example 3, and the average was taken.
Thereafter, for each, the difference between the target stimulus and the base stimulus was obtained, and the measurement result of the pair of probes that showed the most lens performance was shown in FIG. FIG. 14 is a graph showing the difference between the oxygenated hemoglobin amount when the target stimulus is applied and the oxygenated hemoglobin amount when the base stimulus is applied, with the time axis being horizontal, and corresponds to the sensibility response value. From this graph, the 0 second state without stimulation indicates near 0, but when the target stimulation is started, the oxygenated hemoglobin differential value increases as the amount of stress increases, and decreases rapidly with the end of 30 seconds. . As a result, the wearer F can determine that the target evaluation has reached the predetermined evaluation value because the oxygenated hemoglobin amount and the total hemoglobin amount are increased by giving the target stimulus, and the target stimulus and the measurement result are correlated. I understand that
In the measurement result of the wearer F, for example, the maximum oxygenated hemoglobin difference amount is adopted as an evaluation scale, and the Sf vector can be defined as a one-dimensional vector having a magnitude in an index of “blur” of 0.12. Sf = (0.12).
In the third embodiment, the measurement results between a pair of probes are shown for ease of explanation, but actually, since the measurement results between a plurality of probes are used, oxygen between each of n probes is used. If the hemoglobin difference amount is S1, S2, S3... Sn, the evaluation scale vector can be defined as Sf vector = (S1, S2, S3,..., Sn).

5. Design of new lens surface shape based on evaluation value Next, measurement of oxygenated hemoglobin in blood using a similar near-infrared spectrometer for the wearer F was performed under different conditions.
Here, the evaluation value of the wearer F is 0.12 for the target stimulus given S + 3.00D, 0.10 for S + 1.00D, and 0.02 for S + 0.50D. I asked. First, after measuring at S + 3.00D, when S + 1.00D is given, the evaluation value is small, but the evaluation value is still high, that is, a stimulus is felt. Therefore, when measured again at S + 0.50D, an evaluation value of 0.02 could be obtained. This evaluation value is close to 0 and can be determined to be within the allowable determination, and it can be said that the sensitivity to the blur felt by the wearer F has no effect. In the third embodiment, the threshold value for tolerance determination is set to 0.03 from the measurement result of the baseline.
Therefore, when designing a preferable aspherical lens for the wearer F, it is possible to obtain a preferable design as shown in FIG. 15 in which the curvature of field at the lens peripheral portion is 0.50 D at the maximum.
Although various calculation methods are possible, it can be said that the design in FIG. 15 is between the lens surface shapes in FIGS. 9A and 9B used in the second embodiment. The starting shape is a sag of 9 (a), and the difference between the shape of FIG. 9 (a) and the shape of FIG. 9 (b) is a shape change vector Fv (Fv1, Fv2, Fv3... Fsn). FIG. 9A can be designed by changing the magnitude of the shape change vector until the design target (in the case of the third embodiment, the field curvature 0.50D at the lens peripheral portion) is achieved. .
Alternatively, in the same manner as in the second embodiment, a lens having a field curvature within 0.50D is selected from a large number of lenses (or lens data) prepared in advance and having different characteristics of the field curvature and astigmatism. Also good.

As in the first and second embodiments, the evaluation value and the sensitivity response value may be collected, for example, at a spectacle lens retailer or an ophthalmologist.
With this configuration, in Example 3, it is possible to measure the ease of use of blur as an index objectively as a numerical value by measuring the brain waves of how the individual wearer feels. It is possible to provide an optimal lens for a person.

The present invention can be implemented with the following modifications.
In the present embodiment, the amount of oxygenated hemoglobin in the brain wave or cerebral blood is used as the biological information. However, for example, a plurality of biological information such as an electroencephalogram and a blink is measured and weighted to be similar to the above embodiment. It also includes making it an element fed back to the design by processing data.
In the first and second embodiments, the electroencephalogram is used as the biometric information. However, for example, a plurality of biometric information such as the oxygenated hemoglobin amount in the brain blood and the electroencephalogram and blinks can be used as the biometric information.
The measurement times given in the examples are only examples and can be changed as appropriate. In addition, the number of measurement repetitions can be changed as appropriate.
-The number of repetitions for obtaining the average value of the target stimulus and the base stimulus can be appropriately changed.
In Example 3, the oxygenated hemoglobin amount was used as the biological information, but the deoxygenated hemoglobin amount or the total hemoglobin amount (total amount) measured simultaneously can also be used. Since the amount of deoxygenated hemoglobin decreases relatively as the amount of oxygenated hemoglobin increases, the amount of deoxygenated hemoglobin can be used instead of the amount of deoxygenated hemoglobin as the value measured by the near-infrared spectrometer. It becomes possible. In addition, since the total amount of hemoglobin in the brain blood itself increases and decreases in the environment when measuring the evaluation task as described above, the total amount of hemoglobin is measured with a near-infrared spectrometer, and the total amount of hemoglobin varies depending on the conditions. It is also possible to calculate and use an evaluation value.
In Example 3, the oxygenated hemoglobin amount was used as the biological information, but two or more of the deoxygenated hemoglobin amount or the total hemoglobin amount (total amount) measured simultaneously with the oxygenated hemoglobin amount were adopted as the biological information. For example, the evaluation value can be calculated and used based on the ratio of the deoxygenated hemoglobin amount to the oxygenated hemoglobin amount, the change in the ratio of the deoxygenated hemoglobin amount to the total hemoglobin amount, or the like.
The first embodiment can be executed with an aspheric lens other than the progressive power lens. Conversely, in the second and third embodiments, the present invention can be executed with a lens other than an aspherical lens, for example, with a field progressive power lens.
In the third embodiment, other than the evaluation value, it is possible to use a predetermined parameter such as an integral value or a maximum value in the task.
-Besides, it is free to implement in a mode that does not depart from the gist of the present invention.

Other technical ideas of the present invention that can be grasped from the above-described embodiments that can be appropriately added to the above claims will be described as additional notes below.
(1) The first visual content that stimulates sensibility through visual perception such as characters, figures, images, or images is caused to be visually observed by the wearing subject, and predetermined biological information of the wearing subject is measured along with the visual content, and measurement is performed. The result is acquired as a sensitivity response value that can indicate a ground state when a stimulus is not felt, and a reference evaluation value of an evaluation scale for a predetermined index in the first visual content is calculated based on the sensitivity response value. A reference evaluation value calculation step;
The second visual content having a smaller stimulus that gives sensitivity to the first visual content is visually recognized by the wearing subject, and predetermined biological information of the wearing subject is measured along with the second visual content, and the measurement result feels a stimulus. A comparative evaluation value calculation that is obtained as the emotional response value that can indicate a ground state when there is not, and calculates a comparative evaluation value of an evaluation scale for a predetermined index in the second visual content based on the emotional response value Process,
A first determination step of comparing the reference evaluation value and the comparative evaluation value to determine that the comparative evaluation value is not at least larger than the reference evaluation value;
In the first determination step, when it is determined that the comparative evaluation value is not at least larger than the reference evaluation value, the second visual content includes a predetermined tolerance including a ground state that does not feel a stimulus with respect to a predetermined index A second determination step of determining whether the sensitivity reaction value is within a range based on the comparative evaluation value,
If it is determined in the second determination step that the evaluation value is not within an allowable range, the comparative evaluation is performed by using a visual content having a smaller stimulus for sensitivity than the second visual content as the new second visual content. When the value calculation step is executed and, on the other hand, it is determined that the comparative evaluation value is an evaluation value within a predetermined allowable range, the correspondence with the evaluation value relating to the evaluation index of the predetermined index prepared in advance is clear In addition, a lens or lens data having a lens surface shape suitable for the wearing subject is selected from a plurality of lenses or lens data having different lens surface shapes based on the comparative evaluation value.
This is a configuration corresponding to the third embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Sample chart as visual content, 13 ... Analysis computer which performs reference | standard evaluation value calculation process, specific evaluation value calculation process, specific sensitivity value calculation process, 18 ... Gaze point as visual content.

Claims (21)

A plurality of subjects obtained by causing a plurality of subjects to visually observe first visual content that stimulates sensibility through visual perception such as letters, diagrams, images, or images, and by measuring predetermined biological information of each person along with the first visual content. A reference evaluation value calculating step of calculating a reference evaluation value of an evaluation scale related to a predetermined index in the first visual content based on the measured value of
The second visual content which is different from the first visual content or the first visual content but has a correspondence with the reference evaluation value in the reference evaluation value calculation step is referred to as a subject (hereinafter referred to as a wearing subject). Along with the visual observation, predetermined biological information of the wearing subject is measured, and a specific evaluation value of the wearing subject of the evaluation scale relating to the predetermined index in the first visual content is calculated based on the measured value. A unique evaluation value calculation step;
A unique sensitivity value calculating step of calculating a unique sensitivity value calculated from the reference evaluation value and the unique evaluation value;
Suitable for the predetermined index in the wearing subject by giving a shape correction based on the uniqueness value obtained in the uniqueness value calculation step to a base design in which a correspondence relationship with the reference evaluation value is set in advance A spectacle lens design method comprising a lens surface shape determination step for determining a lens surface shape of a spectacle lens. The spectacle lens design method according to claim 1, wherein the base design is a design corresponding to the reference evaluation value. When measuring the first or second visual content, measure the base visual content that has a smaller stimulus to the sensibility than the first or second visual content, and use the difference between them as a measurement value. The method of designing a spectacle lens according to claim 1 or 2. The spectacle lens design method according to claim 1, wherein the predetermined biological information is an electroencephalogram. The predetermined biological information is at least one selected from oxygenated hemoglobin amount, deoxygenated hemoglobin amount, and total hemoglobin amount in cerebral blood. Design method for eyeglass lenses. The spectacle lens design method according to claim 1, wherein the spectacle lens is a progressive power lens. The spectacle lens design method according to claim 1, wherein the spectacle lens is an aspherical lens. The spectacle lens design method according to claim 1, wherein the wearing subject is a spectacle lens purchase applicant, and the measurement of the biological information is performed at a spectacle lens retail store or an ophthalmologist. . The inherent evaluation value calculation step is performed on biological information measured at a spectacle lens retail store or an ophthalmologist, and the obtained evaluation value is transmitted to a lens processing place via communication. The method for manufacturing a spectacle lens according to claim 1, wherein a shape determining step is executed. The biological information measured at a spectacle lens retail store or an ophthalmologist is transmitted to a lens processing place via communication, and the lens surface shape determination step is executed at the lens processing place. Method for manufacturing eyeglass lenses. A plurality of subjects obtained by causing a plurality of subjects to visually observe first visual content that stimulates sensibility through visual perception such as letters, diagrams, images, or images, and by measuring predetermined biological information of each person along with the first visual content. A reference evaluation value calculating step of calculating a reference evaluation value of an evaluation scale related to a predetermined index in the first visual content based on the measured value of
While the first visual content or the first visual content is different from the first visual content, the second visual content in which the correspondence with the reference evaluation value in the reference evaluation value calculation step is obtained is visually observed by the wearing subject as the wearer. The unique evaluation value for measuring the predetermined biological information of the wearing subject along with the visual observation and calculating the unique evaluation value of the wearing subject of the evaluation scale related to the predetermined index in the first visual content based on the measured value A calculation process;
A unique sensitivity value calculating step of calculating a unique sensitivity value calculated from the reference evaluation value and the unique evaluation value;
Prepare a plurality of lenses or lens data with clear lens surface shapes that have clear correspondence with the reference evaluation values in advance, and are suitable for wearing subjects based on the unique sensitivity values obtained in the unique sensitivity value calculation step A method for selecting spectacle lenses or lens data comprising a lens selection step of selecting a lens or lens data having a simple lens surface shape. The first visual content that stimulates sensibility through visual perception such as letters, figures, images, or images is made to be visually recognized by the wearing subject, and predetermined biological information of the wearing subject is measured along with the visual content, and the measurement result is stimulated. A reference evaluation value that is obtained as a sensitivity response value that can indicate a ground state when the user does not feel the image, and calculates a reference evaluation value of an evaluation scale related to a predetermined index in the first visual content based on the sensitivity response value A calculation process;
The second visual content having a smaller stimulus that gives sensitivity to the first visual content is visually recognized by the wearing subject, and predetermined biological information of the wearing subject is measured along with the second visual content, and the measurement result feels a stimulus. A comparative evaluation value calculation that is obtained as the emotional response value that can indicate a ground state when there is not, and calculates a comparative evaluation value of an evaluation scale for a predetermined index in the second visual content based on the emotional response value Process,
A first determination step of determining whether or not the reference evaluation value calculated in the reference evaluation value calculation step has reached a value greater than or equal to a predetermined magnitude;
In the first determination step, when it is determined that the reference evaluation value has reached a value greater than or equal to a predetermined size, the second visual content includes a predetermined state including a ground state that does not feel a stimulus with respect to a predetermined index A second determination step of determining whether the sensitivity reaction value is within an allowable range based on the comparative evaluation value,
If it is determined in the second determination step that the evaluation value is not within an allowable range, the comparative evaluation is performed by using a visual content having a smaller stimulus for sensitivity than the second visual content as the new second visual content. Execute the value calculation process,
On the other hand, when it is determined that the comparative evaluation value is an evaluation value within a predetermined allowable range, the correspondence with the evaluation value relating to the evaluation scale of the predetermined index prepared in advance is clear and different lens surfaces A spectacle lens or lens data selection method that selects a lens or lens data having a lens surface shape suitable for a wearing subject from a plurality of lenses or lens data having a shape based on the comparative evaluation value. 13. The spectacle lens or the lens data according to claim 12, wherein the predetermined index is ease of getting used to blur, and a lens having a different power is used as a means for giving a stimulus difference of visual contents. Selection method. When measuring the first or second visual content, measure the base visual content that has a smaller stimulus to the sensibility than the first or second visual content, and use the difference between them as a measurement value. The method for selecting a spectacle lens or lens data according to claim 11. The method for selecting spectacle lenses or lens data according to claim 11, wherein the predetermined biological information is an electroencephalogram. The predetermined biological information is at least one selected from oxygenated hemoglobin amount, deoxygenated hemoglobin amount, and total hemoglobin amount in brain blood. A method for selecting spectacle lenses or lens data. The method of selecting a spectacle lens or lens data according to claim 11, wherein the spectacle lens is a progressive power lens. The spectacle lens design method according to claim 11, wherein the spectacle lens is an aspheric lens.
The spectacle lens or lens data according to claim 11, wherein the subject is a spectacle lens purchase applicant, and the measurement of the biological information is performed at a spectacle lens retail store or an ophthalmologist. Selection method. The spectacle lens according to any one of claims 11 to 19, wherein the reference evaluation value calculation step and the unique evaluation value calculation step are executed on biological information measured at a spectacle lens retail store or an ophthalmologist. Lens data selection method. 21. The method for selecting spectacle lenses or lens data according to claim 20, wherein the biological information measured at a spectacle lens retail store or an ophthalmologist is transmitted to a lens processing place via communication.

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