KR101474021B1 - Optometry - Google Patents

Abstract

Even a subject who lacks expert knowledge makes it easy to understand the way of seeing by various correcting lenses, and the examiner can easily explain the way of seeing by various correcting lenses.

An optometric apparatus for examining a refractive power of an eye to be examined includes data acquisition means for acquiring an accommodation power based on a total calibrating frequency of the eye to be examined, a calibrating frequency of the source prescription, a working diopter or an approximate diopter, Calculating means for obtaining a clear range of the eye to be examined corrected by at least one lens among any one of a focal length lens for short focal length, a short focal length lens for short focal length, and a progressive lens based on the data obtained, And a display means for displaying on the screen a graphic in which a target is arranged at a distance for a distance and a medium distance respectively and for displaying a clear area by the computing means in a graphic manner on the screen.

Description

[0001] OPTOMETRIC APPARATUS [0002]

The present invention relates to an ophthalmologic apparatus for displaying a clear range of each correcting lens based on subjective observer's eye data.

When there is a refractive error in the subject, an optometric apparatus for subjectively measuring the refractive power of the eye is used (for example, see Japanese Unexamined Patent Application Publication No. 8-266467) in order to determine the calibrating frequency of the spectacle lens for correcting the refractive error. Further, there has been proposed an apparatus for graphically displaying a clear region from an approximate point to the origin from the measurement data of the near-point by the near-point system and the refractive power obtained by the angular ophthalmic refractive power measuring apparatus (or the frequency of the current correcting lens) Japanese Unexamined Patent Publication No. 9-182722).

By the way, in the middle and long years, the nervous system becomes less able to control, and the vicinity of the vicinity of the self becomes less visible. For this reason, in the refractive correction of the eye to be examined, not only a correction lens at a distance but also a near-vision correction lens is required. In the correction of distant vision and near vision, there is a far vision progressive lens which separately uses a short focus lens for near vision and a short focus lens for near vision, and covers a distance from the far vision to near vision without a boundary line. The progressive lenses include progressive progressive lenses (progressive lenses that cover the neighborhood of about 60 cm from the periphery of the self), progressive lenses of the mid-range (progressive lenses that cover the middle distance of about 2 m around the self).

Thus, the examinee selects the correcting lens according to the degree of correction of the eyes and the visual environment required by the examinee, and the examinee who lacks the expertise does not know how the correcting lens looks, and it is difficult to select an appropriate correcting lens . In addition, it has been difficult for an examiner at an optician or an ophthalmologist to appropriately explain the manner in which the subject is examined by various correcting lenses.

In view of the above prior art, it is an object of the present invention to provide an image forming apparatus and a method for correcting an image of a subject, The present invention provides an ophthalmologic apparatus capable of performing an ophthalmologic examination.

In order to solve the above problems, the present invention is characterized by having the following configuration.

(One). An optometric apparatus for examining a refractive power of an eye to be examined,

A data acquiring means for acquiring an accommodating power based on the working distance at the time of measuring the total calibrating frequency of the subject's eye, the calibrating frequency of the patient's prescription, the near or far diopter,

Calculating means for obtaining a clearness range of the eye to be examined corrected by at least one lens of a certain short focal length lens, a near short focal length lens and a progressive lens based on the acquired data,

And display means for displaying on the screen a graphic in which a target is placed at a predetermined near distance, a distance for distance and a medium distance from the examinee as a starting point and displaying the clear region by the computing means on the screen Wherein the light source is a light source.

(2). (1)

Wherein said calculating means includes calculating means for obtaining said clear region on the basis of an origin and an approximate point of the eye corrected by the lens,

The origin of the eye corrected by the far-end lens for farsightedness is obtained based on the difference between the full-caliber calorie power of the source and the calorie power of the calorific power of the source, and the near- Difference, and accommodation,

The origin of the eye corrected by the near single focal lens is obtained on the basis of the difference between the source full corrective dioptric power and the source prescription corrective power and the addition dioptric power and the nearest point of the eye corrected by the near- Based on the difference in cal- culation frequency, the frequency of addition, and the accommodation power,

The origin of the eye corrected by the progressive lens is obtained on the basis of the difference between the full calorie power of the source and the calorie power of the prescription for the source, and the near point of the eye calibrated by the progressive lens is obtained by the difference between the full calorie power, And an adjusting force.

(3). (2)

Wherein said calculation means is adapted to use said adjustment force by a certain ratio? X, and to calculate a midpoint of a clear zone for expressing a clear zone in which eyes are not fatigued, The center point of the clear zone by the short focus lens is obtained on the basis of the full calibrating frequency of the source, the calibrating frequency of the source, the adjusting power and the ratio ΔX, On the basis of the working distance used in measuring the joining dioptric power,

Wherein the display unit displays on the screen the first area from the origin to the intermediate point and the second area from the midpoint to the nearest point in the graphic display of the clear zone.

(4). (1), further comprising:

Selecting means for inputting a signal for selecting each lens,

And storage means for storing characteristics relating to the field of view of each lens,

Wherein the display means calls the characteristic relating to the field of view of the lens from the storage means on the basis of the selection signal of the selection means and displays the visual field on the screen of the graph in which the target is arranged at the near distance, And further displays a graphic having a two-dimensional enlargement that images the characteristics of the range.

(5). (1), further comprising:

And a changing means for inputting a signal for changing the displayed data by calling and displaying on the screen of the display means the data of the full calibrating frequency for the source, the calibrating frequency for the calibrating for the source, the frequency of the joining frequency and the working distance,

Wherein said calculating means calculates the clear region again based on the data changed by said changing means.

(6). (1)

Wherein the spherical power and the astigmatism power are included in the far-infrared full power caliber and the far-infrared power calibration formula acquired by the data acquisition means,

Wherein the display control means displays the graphics of the clear region in the first display form when the difference? C between the astigmatism dioptric power of the full calibrating power of the source and the astigmatic dioptric power of the power source prescription corrective power is less than a predetermined value, Or more is displayed by the second display form informing that the clarity of the display area is lowered.

(7). (1), further comprising:

And an all-eye glasses calibration frequency input means for inputting the cal- culation frequency of the spectacle lens used by the examinee (hereinafter, all-eye glasses cal- culation frequency)

Wherein said calculating means obtains the specified region of the eye corrected by the lens of all eyeglasses calibrating degrees based on the data of the total calibrated dioptric power and the total eyeglasses calibration dioptric power,

Wherein the display means displays on the screen a graphical representation of the corrected region of eyes calibrated by a lens of all eyeglasses calibrating degrees.

According to the present invention, even a subject who lacks expertise can easily understand the manner of viewing by various calibrating lenses, and the viewer can easily explain the manner of viewing by various calibrating lenses.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a schematic configuration diagram of an optometric apparatus. The optometric apparatus includes a measurement unit (a subjective eye refractive power measurement apparatus) 3 for switching and arranging various optical elements on right and left examination windows 6 and a target presenting apparatus 3 for displaying an examination target on a display 2a such as a liquid crystal. An operation unit 1 for inputting a command signal for operating the measurement unit 3 and the index display device 2 and a relay unit 4 for relaying transmission and reception of command signals in these devices . The operation unit 1 has a display 21 for displaying optometric information, and also serves as an optometric information display device.

Inside the measuring unit 3, a lens disk such as a spherical lens disk, a circumferential lens disk, and a sub-lens disk for switching optical elements such as a correcting lens is built in the right and left examination windows 6, respectively. The measuring unit 3 is provided with a near field bar 8 on which a scale capable of measuring the distance is mounted and the near field probe 5 is movably mounted on the near field bar 8. In the near field inspection, the near field probe 8 is transmitted to the near field, and the near field probe 5 is placed so as to be visible from the left and right inspection windows 6. At the time of the distance examination, the near-field rod 8 and the near-term target 5 are retracted to the retreat position, and the inspection target is presented to the target presentation device 2 at the distance of 5m or longer.

The operation unit 1 is composed of a touch panel type display 21 for displaying optometrist information and an operation panel unit 32 having various operation keys. Further, the display 21 also serves as a display means for displaying a clear area after the examination. 2A, the operation panel unit 32 includes a measurement eye selection key group 33 having keys for individually or simultaneously designating right and left measurement planes, a spherical diopter S, a astigmatism diopter C, A mode key group 34 having a key for designating an adjustment mode such as a frequency (A) and a joining frequency (ADD), an input data designation key group 35 having a key for designating input data such as an angle value / A dial knob 36 used for changing measurement values such as S, C, and ADD and numerical input, a menu key 37 for displaying a menu screen on the display 21, An optometry program key group 38 in which a start key and a transmission key are arranged, and a shift key 39 and the like. When the shift key 39 and other keys are pressed at the same time, the switch function of the other keys is switched to the other.

2B is an example of a measurement screen of the display 21 at the time of measurement. (Spherical diopter (S), astigmatic diopter (C), astigmatism axis angle (A), subscription diopter (ADD), and astigmatism diopter of the optical system disposed in the examination window of the measurement unit 3 are displayed on the display portion 21a near the center of the screen. ) Is displayed. The frequency to be adjusted by the switch of the mode key group 34 is designated. A check mark selection box 22 is formed on the right side of the screen and an inspection mark to be displayed on the target mark presentation device 2 can be selected by each key of the check box 22. Further, the inspection target is displayed on the display unit 23 as a graphic. In the example of FIG. 2A, a cross grid target used at the near-field inspection is shown.

3 is a control block diagram of the operation unit 1. Fig. The switch signal from the operation panel unit 32 and the switch signal of the touch function of the display 21 are input to the control unit 20. [ The control unit 20 controls the display of the display 21 on the basis of the switch signal and transmits a control signal relating to the power measurement to the measurement unit 3 and outputs a control signal relating to the inspection target to the target presentation device 2 . The control unit 20 is connected with a memory 24 for storing inspection data, a program for expressing the position of the display, and the like.

Next, an ophthalmological examination procedure for determining the calorimetric power for calibrating the refractive error of the eye of the examinee using the optometric apparatus having the above-described configuration will be described (see the flowchart of Fig. 4).

2B is displayed on the display 21 and the spherical lens and the astigmatic lens are switched and arranged on the examination window 6 of the measurement unit 3 by the operation of the operation unit 1, (The maximum corrective power for near vision when the best visual acuity is obtained). In the determination of the degree of complete correction of comfort, the spherical diopter (S) is adjusted by the R / G (red-green) inspection performed before the astigmatism test, the astigmatic axis (A) is adjusted by the axis adjustment test, The astigmatic power (C) is calibrated by an adjustment test. Next, the spherical power S is adjusted again with the second R / G test to prevent overcorrection to obtain the best visual acuity, and then adjusted to the nearest spherical power S at which the best visual acuity is obtained by the visual acuity check Thereby determining the total calibrated frequency of comfort. Once the total calibration frequency of comfort is determined, the total calibration frequency of the other comfort is determined by the same test. Next, the balance check target is presented, and the balanced total binocular binocular corrective power is determined so that the binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binocular binoculars In each of the tests, the target inspection target is displayed on the target presentation device 2 by each key of the selection box 22 on the measurement screen displayed on the display 21. [ When the optometrist program is being executed, preprogrammed targets are switched and displayed for each inspection sequence.

After determining the total correcting power of the eyes, the S and C are weakened so that the eye of the examinee does not become fatigued with respect to the binocular perfect calorie power, with reference to the eye care history of the testee, the calibrating frequency of the spectacle lens used so far And moves to the test for determining the prescription correction frequency in the adjusted callee. For example, in the case of myopia, if the spherical power (S) increases more than -0.75D relative to the previous spectacle lens power, the eye tends to be fatigued. Therefore, up to -0.75D (Refer to Japanese Unexamined Patent Application, First Publication No. Hei 8-266467, etc. for adjustment of prescription correction frequency for a circle).

When the prescription correcting dioptric power for the source is determined, the mode is set to the joining diopter adjustment mode by the switch operation of the mode key group 34 of the operation unit 1 and the near vision examination target 5 is moved to the near vision examination. In the addition frequency adjustment mode, the calibration optical system of the measurement unit 3 is set to the full calibration frequency. Further, a cross cylinder lens (a lens having a cross cylinder +/- 0.50 D and a minus axis thereof set at 90 degrees) is disposed in the left and right inspection windows of the measurement unit 3. The set of the near vision inspection target 5 presents the cross grid target at a distance of 40 cm (or a desired working distance WD) in front of the subject as the working distance WD. Then, the addition diopter (ADD) is determined by adjusting the spherical diopter to the fully calibrated dioptric power such that the vertical line and the horizontal line of the cross grid is almost equal. The addition frequency (ADD) by the examination using the cross grid index is determined as the frequency when half of the control power of the subject's eye is used.

The working distance WD can be input by operating each key of the operation unit 1 and using a predetermined input screen. The addition frequency (ADD) of the prescription is obtained by calculation from the difference between the full calibration frequency and the prescription correction frequency. Preferably, the measurement unit 3 is adjusted while confirming the visual acuity with the correction optical system set to the addition diopter (ADD) of the prescription, and determines the addition diopter (ADD) of the prescription.

Next, the mode of the control near-point inspection for measuring the adjustment force (NPA) is set by the key operation of the operation unit 1. [ In the control near point test, for example, a small-sized visual acuity value target possessed by the near-field inspection target 5 is used in a state in which an optical system with a fully calibrated power is disposed, and the target is gradually approached to the eye, (Unit: m), which is the minimum distance that can be visually recognized without reading, is read using the scale or scale of the near-field rod 8. [ In the mode of the controlled near point test, the near point distance (NP) (unit: m) is input by the dial knob 36.

Here, when an approximate distance is NP and an origin distance is FP, the controlling force (NPA) (unit: diopter) is generally obtained by the following equation.

NPA = 1 / NP - 1 / FP

Since the origin (FP) is difficult to measure through the subjective optometry, the near distance (NP) is measured with the calibrating lens of the fully calibrated state for the circle being placed. Since the origin (FP) can be regarded as infinite, the control force (NPA)

NPA = 1 / NP

Respectively. In the case of an eye to be examined in which the vicinity of 40 cm can not be specified, a positive lens is added to the total calibrated frequency for the source. Then, when the near distance (NP) is measured with the frequency as? PA,

NPA = 1 / NP -? PA

Respectively. When the apex is measured in the state that the addition frequency ADD is added,? PA is ADD.

As another method, there are a total calibrating frequency of a source, a prescription calibrating frequency, an addition power (ADD) measured by a near-field test using a cross grid target, and a working distance at that time WD), it is also possible to obtain it simply by the following equation. It is preferable that the addition diopter ADD is obtained as a value when the adjustment force is used by a certain ratio? X and the eye is not fatigued. The value of DELTA X is used between 1/3 and 2/3, and generally 1/2 is used.

NPA = Equivalent spherical power of the formula 1 / WD - ((Calculation frequency - total calibration frequency) + ADD (prescription frequency)) × 1 / ΔX

In either case, the NPA can be considered the same. Also, strictly speaking, even though the control power (NPA) in the right eye and the left eye are different from each other, even if they are the same control force in both the right and left eyes, the problem is small in practice because it becomes a standard in the explanation of the following description.

As described above, the data of the binocular perfect correction diopter for source including the spherical diopter (S) and the astigmatism diopter (C) obtained by the eye of the operation unit 1 and the measurement unit 3, The data of the addition frequency ADD and the data of the adjustment force NPA (or data such as the approximate distance based on the calculation of the NPA) are inputted to the memory 24 as basic data of the explicit reverse check, Remember.

Next, when the inspector touches the " explicit reverse check " menu item displayed on the display by the operation of the menu key 37 after the above-described subjective inspection result is obtained, the clear display program is executed . By the execution of the explicit station display program, the screen of the display 21 is switched to the explicit station check screen 100 as shown in Fig. In this explicit station check screen 100, the following graphic is prepared in order to make it easy to compare the differences of the expressions when the testee's eyes are naked and when various correction lenses are mounted and used.

In the explicit reverse check screen 100, in the right area 101, there are displayed a reverse graph 102 in the case where the subject's eye is clear and a reverse graph 103 (in the case of the far- ), The explicit reverse graph 104 in the case where the correcting lens is the near-focus short-distance lens (near-end), the explicit reverse graph 105 in the case of the near-progressive progressive lens, and the explicit reverse graph 106), the explicit reverse graph 107 in the case of a progressive weakening lens, and the explicit reverse graph 108 in the case of a double-focal lens. Further, under the explicit graph 102, a " NA " indication 112 is displayed. Below the explicit trend graphs 103 to 108 of the respective correcting lenses, there are provided a "fabric" key 113, a "near-end" key 114, a "perspective" key 115 ", " intermediate root " key 116, "

Also, in the left area 130 of the screen 100, a graphic for easily imaging the distance and field of view of the display area is displayed. For example, a design 133 that implements a close-up operation of about 40 centimeters about the design 132 of the examinee, a display design 134 that implements a near-end work of about 60 centimeters, A television monitor image 135 for imaging an image of the target and an image 136 such as a scene for imaging the far field are displayed. In addition, a region graphic 140 that schematically shows the distance and field of view of the clear region when viewed through various lenses over these drawings is displayed. A distance axis 120 common to both of the right region 101 and the left region 130 is displayed, and the reference distance is plotted.

The area graphic 140 is switched to a display corresponding to the correcting lens by selecting any one of the correcting lens selecting keys 113 to 118 arranged under each of the expressing reverse graphs. The distance direction of the area graphic 140 is an image that images the range of the selected rectifying lens's visual range, and the width of the area graphic 140 is a two-dimensional image, which images the visual range when the selected correcting lens is used. It becomes an indication having enlargement. The area graphic 140 for each correcting lens is stored in the memory 24 and the corresponding one is called and displayed based on the selection signal of the correcting lens (selection signal of the key 113-118). The distance direction of the area graphics 140 may be formed in the same range as that of each of the graphs 103 to 108 based on the calculation result of the origin and the nearest point of each of the calibration lenses described later.

The explicit graphs 102 to 108 and the area graphic 140 displayed on the screen 100 are displayed on the screen 100 in accordance with the distant calibration frequency (source binocular perfect calorimeter and source precinct calibration frequency) input by the above- , The degree of addition (ADD), and the adjustment force (NPA) (or data such as an approximate distance based on the calculation of NPA), and the origin of the eye corrected by various correction lenses, And the intermediate point are calculated by the control unit 20. The calculation of the origin, the nearest point, and the like of each of the explicit graphs 102 to 108 is basically the same as that of the equivalent spherical surface in the left and right sides, You can switch to the right-eye or left-eye display. In addition, the dominant eye may be used as a standard. Alternatively, when there is a margin in the display space, the explicit reverse graph of the left and right sides in each of the display reverse graphs may be arranged and displayed. In addition, although the indication of the clear zone is basically based on the prescription calibration frequency, when the " aware " key 142 is pressed, the display is converted to a display based on the calibrating frequency. When the " prescription " key 143 is pressed, the display is switched to a display based on the prescribed prescription calibration frequency.

The calculation of each of the near points (NP), the origin (FP), and the middle point (MP) is described below for each of the explicit graphs 102 to 108 (see Fig. 5). In addition, the calculation of the explicit inverse of each graph in Fig. 6 will be described as an example using prescription correction dioptric power based on the right eye.

First, in the uncorrected inverse graph 102, the origin FP is obtained by the reciprocal of the equivalent spherical power SE (hereinafter abbreviated as "Wanse SE") of the binocular perfect correction power. The equivalent spherical diopter SE is obtained by adding the half power of the astigmatism C to the spherical diopter S as is known. The nearest point (NP) of naan is obtained by the inverse of (wan SE + NPA). In addition, the midpoint (MP) when using half of the control force (NPA) of the subject's eye is obtained by the inverse of (Wan SE + NPA / 2).

The origin FP is the equivalent spherical power SE (hereinafter referred to as " (Q-W) SE " of the prescription proofing power-fully correcting power) Quot;). The nearest point (NP) is obtained by the inverse of ((- - 완) SE + NPA). Further, the midpoint MP is obtained by the inverse number of ((W-W) SE + NPA / 2).

The origin FP of the short-circuited short-focal lens (near-end) is used as the additive diopter ADD (hereinafter, abbreviated as "destination ADD") in the prescription, SE + ADD). The nearest point (NP) is determined by the reciprocal of ((AP-W) SE + ADD + NPA). The work distance (hereinafter abbreviated as " destination WD ") is used as the intermediate point MP when determining the addition diopter ADD of the prescription. Here, the working distance when the ADD of the complete calibration and the prescription is determined is all 40 cm.

In the explicit reverse graph 105 of the progressive progressive lens of the perspective, the origin FP is obtained by the inverse of SE (right-handed) as in the case of the short-distance monocular lens. The near point (NP) and the middle point (MP) are obtained by the same calculation as the near-field short-focal length lens.

When the reciprocal of SE is smaller than 200 centimeters, this value is set as the reference point FP (FP) in the expressing graph 106 of the progressive lens of the midpoint, ). The near point (NP) and the middle point (MP) are obtained by the same calculation as the near-field short-focal length lens.

(FP) of the progressive progressive lens of the roughened progressive lens 106 is 60 cm as a reference, but when the inverse number of the (SE-W) SE is smaller than 60 cm, ). The near point (NP) and the midpoint (MP) are obtained by the same calculation as the near-field short-focus lens.

In the expressive graph 106 of the bifocal lens, the origin, the nearest point, and the intermediate point are obtained in the far-end portion and the near portion, respectively. The origin (FP), the near point (NP), and the midpoint (MP) of the far-field portion are obtained by the same calculation as that of the far-field focal length lens. Further, the origin FP, the near point NP, and the midpoint MP of the near-field portion are obtained by the same calculation as the near-field short-focal length lens.

The method of obtaining each of the midpoints (MP) described above is based on the fact that half of the adjustment force is used empirically in the measurement of the addition frequency by the cross grid index as an example. Since the midpoint (MP) at which the eye is not fatigued can be based on 1/3 to 2/3 of the accommodation force, it can be obtained by the following equation. (NPA) is used at a certain ratio DELTA X (preferably between 1/3 and 2/3) so that the proximal point is NP, the control force is NPA, and the eye is not fatigued,

MP = 1 / (1 / NP - (1 - NPA x? X))

. ≪ / RTI >

Alternatively, when using the value of the origin FP,

MP = 1 / (1 / FP + NPA x? X)

(Except for the progressive lens for the mid-muscles and the progressive lens for the muscular muscles).

The respective graphs obtained by the above calculation are expressed as follows. 6 shows that the binocular perfect diopter in the binocular perfect correction has the spherical diopter (S) = -1.00D, the astigmatic power (C) = -0.75D, the astigmatic axis (A) = 5 degrees, (ADD) = + 2.00D and the dioptric power of the prescription is S0 = -0.75D, astigmatism C = -0.50D, astigmatic axis A = ADD) = + 1.75D, and the control force (NPA) = 0.88D. The working distance WD is 40 cm.

The area 102a from the midpoint MP to the origin FP and the area 102b from the midpoint MP to the near point NP can be discriminated and recognized And is displayed in a display form. In this example, the area 102a from the midpoint MP to the origin FP is displayed in blue, and the area 102b from the midpoint MP to the near point NP is displayed in yellow. The region 102a from the midpoint MP to the origin FP means a range in which the adjustment force is half used without being tired and the region 102b from the midpoint MP to the near point NP , And the range in which the control force is used by more than half. The delighted face mark 120a is displayed in the area 102a and the face mark 120b is displayed in the area 102b. With such a display in which the area 102a and the area 102b are distinguished from each other, the inspector can visually recognize the area from the midpoint MP indicated by the blue mark 120a to the origin FP Region 102a and the region 102b from the midpoint MP to the proximal point NP is an area susceptible to eye fatigue easily and visually to the examinee.

Here, FIG. 6 shows an example in which a short focus lens for a circle is selected by the "far end" key 113. In FIG. When the source short focus lens is selected, the area graph 103 is displayed in blue as the area 103a from the midpoint MP to the origin FP, similarly to the explicit reverse graph 102 , And the area 103b from the midpoint MP to the nearest point NP is displayed in yellow. The face marks 120a and 120b are displayed in the areas 103a and 103b, respectively. The areas 104, 105, and 106 of the other calibration lenses that are not selected are displayed in a gray color so that they are clearly distinguished from the selected calibration lens.

When the far-focus lens for a circle is selected, the area graphic 140 in the left area 130 of the screen 100 is displayed as a graphic image for imaging the distance direction and the view area through the short- do. In the case of a short-throw focal length lens, the region graphic 140 is configured to image this characteristic since it generally has a somewhat wide field of view to a far field. The display in the distance direction of the area graphic 140 may be displayed based on the calculation result of the near point NP and the origin MP in accordance with the graph 103. [

When the short-distance lens for near vision is selected by the "near-end" key 114 in order to compare the calibration lens, the explicit reverse check screen 100 is switched to the display of FIG. The area graph 104 of the near-focus monofocal lens is displayed in blue, and the area 104a from the midpoint MP to the origin FP is displayed in blue, as in the uncorrected inverse graph 102, MP) to the nearest point (NP) is displayed in yellow. In addition, distances calculated by the above calculation method are displayed as numerical values at the positions of the near point (NP) and the middle point (MP). Face marks 120a and 120b are displayed in areas 104a and 103b, respectively.

Further, the short-distance near-field lens generally has a relatively wide range in the vicinity. Therefore, the area graphic 140 in the left area 130 is displayed as a graphic having a wide width so as to image a wide field-of-view range in the vicinity of the far-field focal lens in Fig. On the other hand, in the near-focus lens for near vision, since the clarification range of the distance direction is short, it is displayed as a graphic having a length up to about 50 cm in the vicinity so as to image it. The length of the clear region in the distance direction may be displayed based on the calculation result of the near point (NP) and the origin (FP) in the same manner as in the graph (104).

When a progressive lens for perspective is selected by the " perspective " key 115 to compare the calibration lens, the explicit reverse check screen 100 is switched to the display of FIG. The area 105a from the midpoint MP to the origin FP is displayed in blue and the area 105b from the midpoint MP to the near point NP is yellow Is displayed. Face marks 120a and 120b are displayed in each area. In addition, the distances between the midpoint (MP) and the near point (NP) are represented by numerical values. In the progressive progressive lens of the perspective, the width of the progressive band portion between the distance use portion and the distance use portion is generally narrow, and the visual range of the distance use portion is wider than the visual range of the near portion. The area graphic 140 in the left area 130 is displayed as a graphic having a field side wider than the near side and a narrowed central area in order to image the visual characteristics of the perspective progressive lens of this perspective. The distance direction of the area graphic 140 is displayed as a graphic having a length from the neighborhood to the far side in order to image the characteristic of the progressive lens capable of securing the clear region from the far side to the near side.

By using the expressions of the display areas as shown in Figs. 6 to 8, it is possible to visually and visually explain the manner of viewing when passing through each correcting lens. That is to say, the examiner indicates the graph 102, so that it can be explained that there is only a distance of about 80 cm away from me and the neighborhood is difficult to see in me. In the case of using a short focus lens for securing the visual acuity of the original room, it is possible to explain the drawback that the visual disturbance becomes better at the remote place by showing the graph 105 of Fig. On the other hand, in the case of using the short-focus lens for near vision, it is possible to explain that the near vision can be improved by showing the graph 104 and the graphical display 140 in Fig. In this case, the graph 103 and the graph 104 are compared with each other to show that there is a gap between the nearest point of the bright region by the short focus lens for the source and the zero point of the bright region by the short focus lens for near vision . Further, in the case of calibrating by a short focus lens for a source, as shown in Fig. 6, a blue display area 103a from the origin FP to the middle point MP indicating a distance at which the eyes are not tired is displayed, It is possible to visually explain that it is difficult to obtain the visual acuity at the intermediate time.

Then, by selecting the progressive gradient graph 105 by the progressive lens for the near vision, and selecting the progressive lens for the near vision, for the clear region in the short-distance lens for the near and far use as shown in Figs. 6 and 7, It is possible to explain that the visual acuity up to the far vision can be satisfactorily secured.

However, in a progressive lens for a near vision, since the width of the progressive band portion is generally narrow, there is a defect that the field of view of the intermediate portion becomes narrower as the joining diopter becomes larger. The visual characteristics of the perspective progressive lens having this drawback can be easily explained to the testee by showing the graphic 140 shown in Fig.

In this case, when the examinee mainly uses the desk work as an environment in which the spectacle lens is mounted and used, and the visual attention to the comparatively close distance (about 60 cm) around the self is emphasized, Cm < / RTI > in the vicinity). When the progressive progressive lens is designated by the " finisher " key 117, the display of the screen 100 is switched as shown in FIG. The area 107a from the midpoint MP to the origin FP of the explicit reverse graph 107 is displayed in blue and the area from the midpoint MP to the near point NP 107b are displayed in yellow. In addition, the area graphic 140 of the left area 130 is converted into a display that imaged the visual characteristics of the progressive progressive lens. In the progressive progressive lens, in general, the near-field region is wider than the far-field region. In order to easily imitate the characteristics of the progressive lens of this vicinal root, the area graphic 140 is displayed as a graphic with a wide field of view around the self and a clear range of the origin at about 60 cm. With such a display, the inspector can explain the securing of the clear zone in the case of using the progressive weakening lens, and moreover, can easily explain the visual range of the clear zone. It can be explained by comparing the expressing graph 104 and the expressing graph 107 of the near-focus short-axis lens that the visual progress of the long distance from the progressive lens of the roots can be ensured.

On the other hand, in the case where the interior of the room is used mainly as the environment in which the spectacle lens of the examinee is mounted and the importance of securing the visual acuity up to a medium distance of 2 m around the self is emphasized, the examiner may recommend a progressive lens of the midpoint. When the " center " key 116 is pressed, the display of the screen 100 is switched as shown in Fig. The area from the midpoint MP to the origin FP of the explicit reverse graph 106 is displayed in blue and the area from the midpoint MP to the near point NP is displayed in yellow do. Also, the left region graphic 140 is switched to a display that imaged the visual characteristics of the progressive lens of the midpoint. In the progressive lens of the mid-point, the far-end portion and the near-end portion are generally slightly wider than the progressive lens of the perspective. Further, the width of the progressive band portion is slightly wider than that of the progressive lens of the far-field. In order to image the characteristics of the progressive lens of this midpoint, the area graphic 140 is displayed as a graphic with a slightly wider field of view up to about 2 m of the intermediate distance from the periphery. With such a display, the inspector can explain the securing of the clear zone in the case of using a progressive lens of the middle-focused type, and furthermore, the characteristics of the visual range of the progressive lens of the mid-curvature can be easily understood.

When the " Duplex " key 118 is depressed, the expressive inverse graph 108 of the far-site part and the near-side part shows the area from the midpoint MP to the origin FP in blue, To the nearest point (NP) is displayed in yellow (not shown). The explicit reverse graph 108 is understood as a combination of the graph 103 of the short focus lens for the source and the graph 104 of the short focus lens for the near field. In addition, the left area graph 140 is displayed as a graphic in the same field of view as that of the short focus lens for the source.

11, the right and left calibrations (S, C, A, and B) are displayed on the right side of the screen 100 by pressing the key 145 disposed on the upper right side in the screen 100 shown in Figs. 6 to 10, ADD and WD are displayed in a pop-up display. By using the data list display key 145 formed on the screen 100, the calibration frequency can be confirmed during execution of the explicit reverse display program without returning to the measurement mode.

Also, when the key 144 formed for changing the calibration frequency of the prescription is pressed, the data of the calibration frequency of the prescription is copied, and each data in the data list 150 of Fig. 11 can be changed. The data to be changed is selected by the key operation of the mode key group 34 of the operation panel unit 32 (or by touching each data column of the data list 150), and when the dial knob 36 is turned, Is changed at a predetermined stage. For example, when the examinee wants a progressive lens of perspective and places emphasis on the intermediate time, the value of the spherical power S may be made weak. In this case, if the control section 20 weakens the addition diopter ADD by 0.25D for example by making 0.25D smaller than the spherical diopter S = -0.75D (S -0.50D) Value. That is, ADD = + 1.75D is changed to ADD = + 1.50D. Then, when the correction frequency data of the prescription is changed, the control unit 20 recalculates the origin (FP), the near point (NP), and the midpoint (MP) of each calibration lens, The expressing graphs 103, 105, and 106 of the lens are also changed according to the recalculated values.

Further, for example, when the examinee changes the desired working distance WD, the joining diopter ADD is changed by the control unit 20 in accordance with the changing distance. Assuming that the current working distance is WD1, the joining diopter in the working distance is ADD1, the working distance after changing is WD2, and the joining diopter accompanying this change is ADD2, ADD2 is calculated by the following equation.

ADD2 = (1 / WD2 - (1 / WD1 - ADD1))

When the WD and ADD are changed, the control unit 20 recalculates the origin (FP), the near point (NP), and the midpoint (MP) of each of the calibrating lenses, , 105, 106) are also changed according to the recalculated values.

Since the calibrated dioptric power can be changed during the execution of the explicit station display program in this manner, the change of the explicit station graph of each calibrating lens can be carried out instantaneously without returning to the measurement mode. In addition, by confirming the visible method desired by the testee in advance, fine adjustment of the prescription correcting dioptric power can be efficiently performed at the time of the temporary frame test (test for checking the manner in which the test lens is put into the temporary frame) .

When the user depresses the key 145 again, the data list for data change 150 is closed, and the data of the changed calibration frequency is stored in the memory 24. [ The prescription data displayed by the key 144 is stored and retained as is. In the case of returning to the measurement mode, confirmation of the changed prescription data and printout thereof can be performed.

In the above screen 100, when the "awareness" key 142 is pressed, the data of the balanced total calibrated diopter of the both sides is displayed in the data list 150. Even in this case, since the total calibrated frequency can be confirmed without returning to the measurement mode, it is easy to prevent overcorrection from exceeding the full calibrated frequency when changing the frequency.

In the above description, the graphic for explicit reverse check is displayed using the display 21 provided in the operation unit 1, but it is also possible to use it for a commercially available personal computer provided with a display. 12 shows a configuration example of a personal computer (hereinafter referred to as PC 80). The PC 80 includes a display 81, a main body 82 having a control unit 84, and an input unit 87 such as a keyboard or a mouse . The control unit 84 has a storage device in which the explicit reverse display program is stored. Data necessary for executing the explicit station display program can be input using the input unit 87 or can be input by data transmission from the measurement unit 1 via a communication line. If the PC 80 is equipped with the above-described explicit station display function, even in a place where the measurement unit 3 and the operation unicycle 1 are not installed, the inspector can explain the visible mode by the correcting lens .

The above-described embodiment can be variously modified. Hereinafter, a modified example will be described. As shown in Fig. 13, on the screen 100, a "glasses" key 146 for displaying the expressing range of the eye corrected by the calorimetric frequency of the spectacle lens previously used by the examinee (hereinafter, So that it is possible to know at a glance the state of the visible range in the total number of glasses corrected by the examinee. The data of all eyeglasses calibration degrees include data on the addition power (ADD) in addition to the spherical power (S), the astigmatic power (C) and the astigmatic axis angle (A) The total eyeglass calibration frequency data is measured with a known lens meter. The data measured by the lens meter is inputted to the control unit 20 through the communication cable by the operation of the input instruction of the operation unit 1. [ Alternatively, the measurement record in the lens meter may be output by a printer or the like, the "glasses" mode may be selected in the input data designating key group 35, and the dial knob 36 may be turned to set the all- , ADD) may be input.

When the inspector presses the " glasses " key 146, the display areas 103 to 108 calculated by the control unit 20 are displayed in the right area 101 based on the all-eye glasses correction frequency data. The origin (FP) in the all-eyeglasses calibration frequency is obtained by substituting the prescription correction frequency with the formula for calculating the correction formula based on the reciprocal of the equivalent spherical power (SE) of (prescription calibration frequency - complete calibration frequency) . Regarding the near point (NP) and the midpoint (MP), the formula for formula in FIG. 5 is also obtained instead of the formula for total eyeglasses calibration. The calculation by the control unit 20 is carried out with respect to the types of the focal length lens for short-distance use, the short-distance focal length lens, the progressive lens for the near vision, the progressive lens for the midpoint, the progressive lens for the roots, and the bifocal lens. The inspector can select the type of the spectacle lens (hereinafter referred to as the eyeglass) which the subject has been using previously by pressing the keys 113 to 118 to select the highlight graph 103-108 in the full eyeglasses to be seen by the examinee .

13, the positions of the far-vision use pictorial graph 108a and the near-sight use pictorial graph 108b are shifted from each other and displayed, Each of which is easy to recognize. In Fig. 13, the explicit reverse graph 105 of the progressive lens for perspective and the explicit reverse graph 106 of the progressive lens for the mid-curvature are selectively placed at the same place by the keys 115 and 116 . In the case where the screen size of the display 21 is large, the display reverse graph based on the all-eye correcting power to display by pressing the "glasses" key 146 may be arranged and displayed.

The inspector can easily explain the visual system in the full spectacles by substituting the case where various lenses are used by the display areas 103 to 108 in this " glasses " mode. In addition, by switching between the "glasses" mode and the "prescription" mode, the examiner can easily explain the difference in the manner in which the prescription values of all the glasses and current presentations are displayed to the examinee, and the examinee understands It becomes easier to do. In addition, since the examinee can easily explain why the examinee is the prescription value (for example, the difference between the prescription of the glasses and the present prescription is large), the examinee can be further convinced.

Also, by using the graphics 140 of the left area 130 at the same time, it is possible to recommend glasses having different distances or fields of view as compared with all glasses, and it is also easy to propose a plurality of spectacles .

Another modification example will be described. In the display of the explicit reverse graph of Figs. 6 to 11 and Fig. 13, when the difference? C between the total cal- culation frequency and the astigmatism diopter (C) of the prescription correction dioptric power is a certain value or more (for example, 0.75D or more) , The astigmatic dioptric power C remains largely unchanged when the astigmatic dioptric power C is corrected, so that the manner of viewing in a specific direction becomes unclear. For this reason, even in the range of the display areas 102 to 108 that appear as a clearly visible range in the calculation, portions that are actually invisible are included. The same is true of the astigmatic dioptric power C within a certain range (for example, 0.75D or more). When the difference ΔC in the astigmatic power C is equal to or greater than a predetermined value for the first display form of the explicit graph 102-108 when the difference ΔC in the astigmatism diopter C is less than a predetermined value, To 108 is changed to a second display form in which the hue of the display is changed, it is easy for the examinee to visually understand that the user does not actually see clearly. For example, in the explicit reverse graphs 102 and 103 of FIG. 6, the regions 102a and 103a displayed in blue are displayed in a grayish tinged color when the difference? C is less than a predetermined value (astigmatism is corrected) And the areas 102b and 103b indicated by yellow are displayed in a grayish yellow color, it is possible to show that the sharpness of the method seen when the astigmatism is largely deteriorated can be shown. Especially, for a less experienced examiner, when the astigmatism is more than a certain level, the display form such as the tone of the expressing graph is automatically changed, so that the description of the manner in which the examinee is seen can be more accurately performed.

The calculation method of the origin FP of the progressive lens for the mid-root and the progressive-use progressive lens in Fig. 5 may be as follows. First, the calculation of the origin (FP) of the progressive lens for the mid-curtain is set to 200 cm as a reference in FIG. 5, but may be the same calculation as that for the perspective progressive lens. In the case of using a progressive lens for the mid-curvature, the eye point of the line of sight is slightly lowered at the time of the far-field, so that the calculation of the origin FP is 1 / ((full-turn) SE + 0.25) By the first step (or second step). In this way, it is possible to present an expression region to the testee in accordance with the actual usage of the progressive lens for the mid-curvature.

In FIG. 5, the incremental prism is fixed at 60 cm with respect to the origin (FP), but the origin (FP) is calculated by decreasing the addition dioptric power with reference to the orthometric dioptric power. The calculation of the origin (FP) shall be 1 / ((SE-W) SE + prescription ADD + negative ADD). The negative ADD of this equation is the data of the decrease in the addition frequency, and this frequency is determined in consideration of the desired origin of the examinee. Hereinafter, the input of the negative ADD for obtaining the origin FP will be described for the progressive progressive lens.

14 shows a case in which the data list 150 is displayed when the prescription key 144 is pressed to change the calibration frequency of the prescription and the progressive progressive lens is selected by the key 115 . In the data list 150, the "circle" mode for displaying the circle calibrations (S, C, A, ADD) of various lenses other than the near-field short focal length lens and the near- Quot; close " mode in which the keys S, C, and A are displayed. By pressing the key 151, the " far away "

15 shows a case where the " near " mode is selected. The values (R: -0.75D, L: -1.25D) of the spherical diopter (S) of the near distance calibration diopter shown in the data list 150 of the "near" Is calculated as a value obtained by adding the addition diopter ADD (+ 1.00D) to the S value (R: -1.75D, L: -2.25D) of the adder 150.

When the progressive progressive lens is selected by the key 117 in this " near " mode, a key 153 for inputting a negative addition power number is displayed below the data list 150. [ In this example, " -1.00D " The examiner can change the value of the negative joining frequency by a predetermined step by touching the key 153. [ For example, when the key 153 is pressed, the minus addition frequency is switched by 0.5D as in "-1.00D", "-1.50D", and "-2.00D". In addition, by turning the dial knob 36 while the key 153 is selected, the minus addition frequency can be changed by a predetermined step. The minus addition frequency may be changed to an arbitrary value. When the minus addition frequency in the progressive lens of the roots is changed, the origin FP is obtained by the above-described calculation method. Then, the display position of the origin FP of the explicit graph 107 is changed. Thereby, when determining the correction frequency of the aggravating progressive lens, the manner in which the correction is made can be easily explained to the testee. The approximate point of the progressive progressive lens is performed by the calculation shown in Fig. When explaining the manner in which the examinee looks to the examinee, it is desirable to use the area graphic 140 together with the display areas 103 to 108 to adjust the value of the negative addition frequency, It is possible to propose a progressive lens of a near-end muscle close to various demands of the examinee, such as a wish to see a circle a little and to make a prescription so that the eye does not become fatigued.

If the user touches the key 153, the screen of the data list 150 is closed, and only the key 153 is displayed on the screen. Therefore, by changing the position of the origin (FP) by changing the minus join frequency, it is possible to prevent the graph 107 of the explicit region from being covered in the data list 150.

Next, a modification example in which the calibrating frequency for prescription is adjustable will be described. As described with reference to FIG. 11, by pressing the key 144, each data in the data list 150 can be changed. Here, if the correction frequency is excessively changed, there is a possibility that the overcorrection is erroneously prescribed. Whether or not overcorrection is determined is determined by comparing the changed frequency with a predetermined criterion for determining overcorrection. In the case where the near-sightedness (spherical power (S) is a negative power), overcorrection is judged when the calibrating frequency for prescription exceeds the total calibrating frequency. In the case of the original clock (the spherical diopter (S) is a positive diopter), when the spherical diopter (S) exceeds 0 and becomes minus in positive, overcorrection is judged. Further, when the astigmatism diopter (C) also exceeds the fully calibrated dioptric power, the overcorrected state is determined. When the calibrating frequency of the prescription is determined to be overcorrected, the display form of the explicit graph 102-108 changes. For example, if it is not overcorrection, it changes to red, warning overcorrection to normal blue, yellow, gray, etc. By displaying a warning in the case of attempting over-correction, it is possible to prevent the examiner from making a mistake in prescribing the lens of the wrong frequency, so that it is possible to more reliably provide the lens of the comfortable degree to the examinee.

1 is a schematic configuration diagram of an optometric apparatus.

2A is an explanatory diagram of an operation panel unit provided in the operation unit.

2B is a view showing an example of a measurement screen of a display.

3 is a control block diagram of the operation unit.

4 is a diagram for explaining an example of a flow chart of the subjective inspection procedure.

5 is a diagram showing an example of an arithmetic expression of a near point (NP), an origin (FP), and an intermediate point (MP). It is a table of calculation formulas for calculating the explicit station.

6 is a diagram showing an example of the explicit reverse display screen.

7 is a diagram showing an example of the explicit reverse display screen.

8 is a diagram showing an example of the explicit reverse display screen.

Fig. 9 is a diagram showing an example of the explicit reverse display screen.

10 is a diagram showing an example of the explicit reverse display screen.

11 is a diagram showing an example of a screen displaying a data list of prescription correcting dioptric power.

12 is a configuration diagram by a personal computer.

13 is a diagram showing an example of the explicit reverse display screen.

14 is a diagram showing an example of a display area display screen.

15 is a diagram showing an example of a display area display screen.

Claims (7)

An optometric apparatus for examining a refractive power of an eye to be examined, A data acquiring means for acquiring an accommodating power based on a working distance at the time of measuring a near total distance or an addition power of the subject's full calibrated dioptric power of the subject's eye, Calculating means for obtaining a clear range of the eye to be examined calibrated by at least one of a focal length short focal length lens, a short focal length short focal length lens and a progressive lens based on the acquired data, Displaying a first graphic on the screen, the first graphic representing a target in which a target is disposed at a predetermined near distance, a distance for a distance, and a middle distance from a testee as a starting point; And a display means for displaying the image on the display means. The method according to claim 1, Wherein said calculation means includes calculation means for calculating said clear region on the basis of an origin and an approximate point of eyes calibrated by said lens, Wherein the origin of the eye corrected by the short focal length lens is obtained on the basis of the difference between the full calibrating power of the source and the calorie power of the prescription for distant vision and the near point of the eye calibrated by the source short focus lens, Based on the difference in power and the control power, Wherein the origin of the eye corrected by the near single focal lens is obtained on the basis of the difference between the source perfect corrective dioptric power and the source prescription corrective power and the addition dioptric power and the near point of the eye corrected by the near- Based on the difference between the calorific power of the prescription for abandonment, And the origin of the eye corrected by the progressive lens is obtained on the basis of the difference between the calorific power of the caloric source and the calorie power of the caloric source and the near point of the eye calibrated by the progressive lens is set as a difference between the calorie power of the source calorie , Said addition power and said accommodation power. 3. The method of claim 2, Wherein the calculation means uses an adjustment force of the ratio DELTA X with respect to the adjustment force and determines an intermediate point of the clear zone of the eye corrected by the lens based on the adjustment value and the adjustment force and the ratio DELTA X Or the intermediate point of the visual range of the eye corrected by the focal length focal length lens is obtained on the basis of the fulcrum of the source perfect corrective power, the focal corrective power of the focal point, the control power and the ratio ΔX, The lens and the intermediate point of the clear zone of the eye corrected by the progressive lens are obtained based on the working distance used for measuring the joining diopter, Wherein the display means displays the first area from the origin to the intermediate point and the second area from the midpoint to the nearest point on the screen in the second graphic display. The method of claim 1, further comprising: Selection means for inputting a selection signal for selecting each lens; And storage means for storing characteristics relating to the field of view of each lens, Wherein the display means calls a characteristic relating to the field of view of the lens from the storage means on the basis of the selection signal of the selection means and displays a two dimensional enlargement for imaging the characteristic of the field of view on the screen of the first graphic Wherein the display unit further displays a graphical image of the subject. The method of claim 1, further comprising: Wherein the data including the calorific power for calorie for source, calorie frequency for calorie for caloric consumption, the number of times of joining and the working distance are called and displayed on the screen of the display means and a change for inputting a signal for changing each displayed data Means, Wherein said calculating means re-calculates said clear region on the basis of said data changed by said changing means. The method according to claim 1, Wherein the spherical power and the astigmatism power are included in the power source perfect calibration frequency and the power source prescription corrective power obtained by the data acquisition means, Wherein the display control means displays the second graphic by the first display form when the difference? C between the astigmatic power of the power source full calibrated power and the power of astigmatic power of the power source prescription corrective power is less than a predetermined value, And displays the second graphic by the second display form informing that the clarity of the visual clarity of the eye falls off. The method of claim 1, further comprising: And calibrating frequency input means for inputting the calibrating frequency of the used lens used by said examinee, Wherein said calculating means obtains a clear range of eyes calibrated by said use lens based on said calorie frequency of said source calorie and the compulsory frequency of said use lens inputted by said calibration calorie input means, Wherein the display means displays on the screen a graphic representing the clear zone of the eye corrected by the use lens.

Images