JP3201342U - Progressive eyeglass design sheet mask measuring jig and progressive eyeglass design sheet mask pasting device - Google Patents

Abstract

To provide a sheet mask measuring jig for progressive spectacle design capable of measuring the position of a distance eye point and a near eye point easily, inexpensively, and with high accuracy. A pair of binocular sheet masks 330 are affixed to the front surfaces of the dummy lenses of both eyes of a spectacle frame containing a dummy lens and used to measure the positions of the distance eye point and the near eye point. This is a progressive mask design sheet mask measurement jig 300. A pair of binocular pair of single horizontal reference lines 30 that are located above the sheet mask and coincide with the height of the distance eye point, and located between the sheet masks, to measure the monocular pupillary distance of each eye A pair of binocular pair of vertical reference lines 31 to 34 composed of different colors, and a vertical distance from a distance eye point to a near eye point located below the sheet mask. A pair of binocular pairs of horizontal reference lines 35 to 38 configured in different colors. [Selection] Figure 5

Description

  The present invention relates to a progressive spectacles design sheet mask measurement jig and a progressive spectacles design sheet mask affixing device.

  When a human sees a target object in the outside world, he moves his body, face (head) and eyeball (referred to as visual movement). At this time, even if the position of the target object is the same, the movement of the body, face (head), and eyeball varies from person to person, and there are individual differences. For example, when a person sees a target object that is 45 degrees to the right from the front, the body is rotated 15 degrees, the face (head) is rotated 15 degrees, and the eyeball is rotated 15 degrees to capture the target object. However, another person rotates the body 5 degrees, rotates the face (head) 30 degrees, and rotates the eyeball 10 degrees to capture the target object. . Various methods of designing and adjusting progressive glasses corresponding to such individual visual movements have been proposed (see, for example, Patent Documents 1, 2, and 3).

  The progressive-power lens 200 includes a distance portion area 21 having a refractive power (frequency) corresponding to distance vision, a near portion area 22 having refractive power corresponding to near vision, and a distance portion area 21. It is an aspherical lens provided with a progressive zone region 23 in which the refractive power gradually changes between the use portion regions 22 (see FIG. 2). By moving the line of sight from the front to the bottom in a single seamless lens with no boundary in these areas, it is possible to continuously and clearly see from far to near.

  However, the distance area, the near area and the progressive zone area of the progressive-power lens are different from the single focus lens, and the clear vision area (area where the object can be clearly seen) through which the binocular line of sight passes is determined. The area other than that area is a non-visible region (an area in which an object appears blurred or doubled). For this reason, if the clear vision region (a clear vision region common to both eyes) that can be seen simultaneously with both eyes when viewing with both eyes is not maximized, the region that is clearly visible with both eyes becomes narrow. Therefore, the distance area, the near area, and the progressive zone area are used for individual purposes (emphasis on perspective, focus on near and near, focus on nearness, full-time use, part-time use, reading, etc., shopping) The eyeglasses need to be adjusted so that the common vision region common to both eyes is maximized (the eyeglass design). Therefore, in the design of progressive glasses, the distance of binocular eyes (distance eyepoint) passing through the distance area of the spectacle lens surface in distance vision, and the near area of the eyeglass lens surface in near vision It is important to determine the line-of-sight position (near eye point) of both eyes that pass through.

  From the above, when designing the spectacles for a spectacle frame wearer who purchases new spectacles, spectacle information (optometry information, spectacle frame information, spectacles) in the case of spectacles (single focus spectacles) using the single focus lens. Engineering fitting that adapts the lens information) to the structure of the face (head) (the shape, relative position, etc. of the eyes, nose and ears relative to the face) is performed. On the other hand, in the case of spectacles using the progressive-power lens (progressive spectacles), in addition to the engineering fitting, it is necessary to measure the above-described two eye points and eye movements.

Special table 2003-523244 gazette Special table 2008-521027 gazette JP 2011-48321 A

The most important thing in the design of progressive glasses is to determine the positions of the distance eyepoint and the near eyepoint.
In Patent Document 1 and Patent Document 2, spectacle parameters (for example, vertical width, target lens size, nose width, right eye height (right eye height) required for designing progressive glasses using a head and eye movement measurement device. Distance eye distance), left eye height (left eye distance eye height), right eye PD (distance from nasal root center to right eye pupil center), left eye PD (nasal root) To obtain the distance from the center to the center of the left eye pupil), the distance between vertices (glasses wearing distance), the forward tilt angle (vertical tilt of the spectacle frame), the warp angle (horizontal tilt of the spectacle frame), etc. It is said that a spectacle frame wearer wears a spectacle frame and shoots with a camera, spectacles parameters are analyzed from the acquired captured image, and the positions of the distance eyepoint and the near eyepoint are determined.

  However, the determination of near-eyepoints in progressive-power lenses involves not only face (head) movements and eye movements but also posture, so it is difficult to determine high-precision near-eyepoints. There are many. In addition, in the presentation that studied the reproducibility of the video type measuring device, among the spectacle parameters of progressive glasses, the nose width, the monocular pupil distance of each eye (right eye PD and left eye PD), and the height of each eye Although the reproducibility for measurements such as sac is relatively good, it has been reported that the reproducibility such as the distance between the vertices and the forward tilt angle was poor (consideration of various video parameter measuring instruments, Yukari Nishikawa, Kikuchi Glasses College, 19th Annual Meeting of the Japanese Optical Society, 2015). In the spectacle design of progressive glasses, the spectacle wearing distance and the forward tilt angle have little influence on far vision, but are serious problems because they have great influence on near vision and intermediate vision. In addition, the measurement of eye movement as in Patent Document 1 and Patent Document 2 has a problem that there are many restrictions on spectacle frames purchased by customers, and it cannot be applied to all spectacle frames. There is also a problem that inspection equipment is too expensive.

  Patent Document 3 relates to a jig, an apparatus, and a measurement method for measuring a downward rotation amount of an eyeball in a state where a spectacle frame to be actually worn is fitted in advance. According to this, it is possible to determine the heights of the distance eye point and the near eye point without actually acquiring the spectacle wearing distance of the spectacle frame and the spectacle parameters of the forward tilt angle.

  However, as described above, the structure of the progressive-power lens must be designed so that the eyes of each eye can accurately pass from the distance eye point to the progressive zone and the near eye point. The binocular common clear vision area (or binocular common clear vision width) becomes narrower and complains of blurring. Accordingly, it is not sufficient to determine only the height of the distance eye point and the height of the near eye point. In particular, a great problem remains for progressive areas and near-use areas where the binocular common clear vision area (or binocular common clear vision width) is narrow. Further, when a spectacle lens with a degree is used for measuring the height of the distance eye point and the height of the near eye point, the downward rotation amount of the eyeball is affected by the prism action of the spectacle lens. Specifically, since the influence on the downward rotation amount of the eyeball is larger in the convex lens and smaller in the concave lens, the measurement accuracy clearly decreases.

  The object of the present invention is to provide a progressive eyeglass design sheet mask measuring jig and a progressive eyeglass design sheet that can measure the position of the distance eyepoint and the near eyepoint in the eyeglass design of the progressive eyeglasses easily, inexpensively and with high accuracy. It is to provide a mask pasting apparatus.

[1] The progressive spectacle design sheet mask measuring jig of the present invention [1] is a distance eye by attaching a pair of binocular sheet masks to the front of each dummy lens of a spectacle frame containing a dummy lens. A progressive mask design sheet mask measuring jig used to measure the position of a point and a near eye point, both positioned above the sheet mask and matched with the distance eye point height of each eye A pair of eyes that are positioned in the middle of the sheet mask and both composed of different colors for measuring the one-eye pupil distance (right eye PD and left eye PD) of each eye. A plurality of vertical reference lines for a pair of eyes;
A pair of binocular pair of horizontal references located under the sheet mask and configured in different colors for measuring the vertical distance from the far eye point to the near eye point of both eyes And a progressive mask design sheet mask provided with a line.

  Here, a general method for measuring the distance eyepoint and the near eyepoint will be described. First, the distance eyepoint is measured in advance by another measuring means, for example, the spectacle frame containing the dummy lens to be actually worn by the spectacle frame wearer, and the examiner wearing the spectacle frame. In the state of facing the person, the pupil center position in the distance vision of both eyes of the eyeglass frame wearer is measured by an objective method of determining by marking the front surface of the dummy lens with a pen or the like (conventional method) The method for determining the distance eyepoint by the above). Here, “objective” means that the inspector makes an independent determination and determination. The measurement of the near eye point is performed by first opening a hole indicating the far eye point provided in a separate translucent processing seal for right eye and left eye attached to the progressive-power lens. The tester is pasted so as to coincide with the distance eyepoints of both eyes that are marked in advance by the objective measuring means.

  Next, as shown in FIG. 22, a mirror method (an objective measurement method) (the inspector and the spectacle frame wearer face each other with a mirror in between. The center of the mirror is taken as a target (mirror target) Similarly, the inspector passes through the mirror at the center of the pupil passing through the front surface of the dummy lens of the spectacle frame worn by the spectacle frame wearer. By determining the optimal near eye point while confirming the position), the near eye point in which the position of the pupil center of each eye of the spectacle frame wearer is provided in the processing seal is obtained. It is judged whether it can confirm from the hole shown. At this time, if the position of the pupil center of each eye does not pass through the hole (correct position) of the processing seal, another processing seal is placed on the front surface of the dummy lens of each eye of the spectacle frame. Similarly, it is determined whether the position of the center of the pupil in near vision of both eyes of the eyeglass frame wearer can be confirmed (the near-eye point determination method according to the conventional method). This operation is repeated until the center of the pupil in near vision can be confirmed from the hole indicating the position of the near eye point of the processing seal.

  In this device, the progressive eyeglass design sheet mask measuring jig is a sheet mask to be attached to the front surface of the dummy lens of the eyeglass frame in order to measure the distance eyepoint and the near eyepoint of each eye. It is. A pair of binocular single horizontal reference lines is provided at a position above the sheet mask. The determination of the distance eyepoint and the near eyepoint first determines the height of the temporary distance eyepoint. The determination of the distance eyepoint is performed in the same manner as before by measuring the position of the pupil center in the distance vision by the objective measurement method with a pen or the like on the front surface of each dummy lens of the both eyes of the eyeglass frame. The temporary eye point is used to determine the distance eyepoint.

  Next, the height of the distance eyepoint used in the actual spectacle design is determined. It is confirmed whether the distance eyepoint provisionally marked on the front surface of the dummy lens of each eye by the objective measurement method is the daily distance eyepoint of the spectacle frame wearer. Specifically, in order to confirm whether the height of the distance eyepoint provisionally stamped on the front surface of each of the dummy lenses of both eyes of the spectacle frame is correct in a natural posture, the spectacle frame wearer Wear the eyeglass frame, which is temporarily marked, and look at the white plate in the distance with your body and face (head) moving freely. At this time, if the spectacle frame wearer responds that the temporary marking point on the front surface of each of the dummy lenses of both eyes of the spectacle frame appears to overlap the distance line of sight, the front surface of each of the dummy lenses of both eyes The height of the distance eye point provisionally marked on is correct. However, if it responds that the distance eye point on the front of the dummy lens of each binocular and the both eyes is not seen overlapping, the temporary marking on the front of the dummy lens of each of the eyes Since the distance of the distance eyepoint thus applied is not correct, the deviation is corrected until the mark points coincide with each other, and the distance is determined and confirmed (Wada type distance eyepoint height determination method).

  Next, the pair of binocular single horizontal reference lines at the upper position of the sheet mask and the mark point (the distance eyepoint of the distance eyepoint) on the front surface of the dummy lens of each of the eyes of the spectacle frame. Paste to match (height).

  Next, the height of the near eye point is determined. The pair of binocular horizontal reference lines configured in different colors for measuring the height of the near eye point are provided at a position below the sheet mask. The eyeglass frame is attached to the eyeglass frame and the eyeglass frame is attached to the eyeglass frame so that the eyeglass frame can be viewed from the near side (downward view). Line of sight) of the binocular pair of horizontal reference lines configured in different colors, which reference line overlaps, or between two adjacent reference lines, or two If it is not in the middle of the reference line, answer which of the reference lines is closest to it, and determine the height of the near eye point from the relationship between these relative positions (the height of the Wada type near eye point) Decision method).

  Next, the one-eye pupil distance (right eye PD and left eye PD) of each of the eyes is determined. The pair of binoculars configured in different colors for measuring the one-eye pupil distance (right eye PD and left eye PD) of each of the eyes in distance vision and near vision is located at an intermediate position of the sheet mask. A plurality of vertical reference lines are provided. When measuring the one-eye pupil distance (right eye PD and left eye PD) of both eyes in distance vision and near vision, first, the spectacle frame wearer is placed on the front surface of the dummy lens of each eye. A pair of binocular pairs of vertical lines that are viewed in a distance or near view with the eyeglass frame attached with the sheet mask attached, and that are configured with colors having different optimum line-of-sight directions (convergence directions). Of the reference lines, which reference line overlaps, is in the middle of two adjacent reference lines, or if it is not in the middle of two adjacent reference lines, which reference line is closer to In response, the relative value of the one-eye pupil distance (right eye PD and left eye PD) of each of the eyes in distance vision and near vision is measured from the relationship between these relative positions. Then, the absolute value of the interpupillary distance (hereinafter referred to as “binocular PD”) measured in advance by another measuring means (for example, a PD meter) and the one-eye pupil distance (right eye) of each of the eyes determined by the measurement. The absolute value of the one-eye pupil distance (right eye PD and left eye PD) of both eyes in distance vision and near vision is calculated by calculation from the relative values of PD and left eye PD).

According to this, since it becomes possible to accurately measure the distance eye point and the near eye point, the selection of the optimum progressive zone length of the progressive power lens for the spectacle frame to be actually mounted and The optimum progressive glasses can be designed.
In addition, when using the progressive glasses, the vertical distance from the far eye point to the near eye point (the amount of downward rotation of the eyeball) is the natural amount of downward rotation generated by single-focus glasses (reference: both Eyesight function and glasses, Toyohiko Hatada, glasses science Japan Ophthalmological Society edited by Vol 1, 1977), it requires training for downward vision, but in order to measure the near eye point By using a plurality of horizontal reference lines of the binocular pair provided on the seat mask, the individual spectacle frame wearer is instructed while actually embodying the magnitude of the downward rotation amount (or downward rotation force). It becomes possible to do.

[2] The progressive spectacle design sheet mask measurement jig of the present invention [2] is the progressive spectacle design sheet mask measurement jig of the present invention [1], wherein the sheet mask is the two eyes of the spectacle frame. A measuring unit capable of maintaining transparency when pasted on the dummy lens of the spectacle frame, the distance eye point, and the near eye point And a grip part that can easily peel off the sheet mask from the front surface of the dummy lens of the spectacle frame after the measurement value is acquired.

In the present invention, the measurement part of the sheet mask does not become opaque even if it is attached to the front surface of the dummy lens of the spectacle frame. In addition, the sheet mask attached to the front surfaces of the dummy lenses of the two eyes of the eyeglass frame after the measurement can be easily peeled off by gripping the grip portion.
According to this, even if the spectacle frame wearer wears the spectacle frame to which the sheet mask is attached, the spectacle frame wearer can see the target object in the external environment as in the case without the sheet mask. Since the frame wearer can perform subjective measurement while confirming the instructions of the examiner, the sense of satisfaction of the spectacle frame wearer is further increased. Here, “subjective” means that the inspector asks the spectacle frame wearer to understand the contents of the test, and the measurement value is derived and determined based on the original determination of the spectacle frame wearer. Furthermore, since the examiner can confirm the position of the pupil center through the sheet mask attached to the front surface of the dummy lens of each eye of the eyeglass frame, it is possible to perform objective measurement. Become. Further, the sheet mask attached to the front surface of the dummy lens of the frame can be easily finely adjusted by a grip portion.

  As described above, since the line of sight and the position of the pupil center can be simultaneously measured between the spectacle frame wearer and the examiner, the measurement accuracy is remarkably improved. Further, the pasting operation of the processing seal on the front surface of each dummy lens of the both eyes of the eyeglass frame that has been pasted many times to determine the passing position of the near line of sight (down line of sight) until now, By using the sheet mask, it is completed by a single pasting operation. In addition, the sheet mask replacement operation for fine adjustment can be facilitated.

[3] The progressive spectacle design sheet mask measurement jig of the present invention [3] is the progressive spectacle design sheet mask measurement jig of the present invention [1] or [2], wherein the measurement portion of the sheet mask includes: The binocular pair of single horizontal reference lines, the binocular pair of vertical reference lines and the binocular pair of horizontal reference line reference lines are narrower than the pupil diameter and opaque. It is characterized by comprising.

  In this device, the line width of all the reference lines provided in the sheet mask is configured to be narrower than the minimum pupil diameter. Therefore, even if the spectacle frame wearer wears the spectacle frame to which the sheet mask is attached and looks at the external target object, the external target object can be seen from the transparent portion of the mask sheet.

  According to this, when the spectacle frame wearer wears the spectacle frame with the sheet mask attached to the front surface of the dummy lens and looks at an object in the outside world, When the reference line of the sheet mask overlaps, visual information from the outside is blocked by the line width of the opaque reference line of the sheet mask, but the width of the reference line is narrower (thin) than the width of the pupil diameter. Therefore, visual information from outside the reference line of the sheet mask is not blocked. For example, if the color of the reference line of the sheet mask is a red line, the target object that is stained in red when the line of sight of the eyeglass frame wearer overlaps the reference line of the sheet mask is seen Does not look blurry. Therefore, the inspector may have the line of sight of the eyeglass frame wearer and the reference line of the sheet mask overlap, or be in the middle of two different reference lines, or two different reference lines By answering in detail which one is closer, it is possible to grasp the exact line-of-sight position passing through the front surfaces of the dummy lenses of both eyes.

[4] The progressive spectacle design sheet mask measurement jig of the present invention [4] is the progressive spectacle design sheet mask measurement jig of the present invention [1] to [3], wherein the sheet mask is It has a mark for attaching in a correct posture when it is attached to the front surface of the dummy lens of each of the eyes of the spectacle frame.

In this device, since there are marks for identifying the top, bottom, left, and back of the sheet mask when pasting the front surfaces of the dummy lenses of the two eyes of the eyeglass frame, the two eyes of the eyeglass frame It is possible to easily understand the attaching posture to each dummy lens.
According to this, since the inspector can quickly perform the operation of attaching the spectacle frame to the front surface of the dummy lens in an actual spectacle store, the inspection time can be greatly shortened. . Further, since there is no mistake in the operation of attaching the sheet mask to the spectacle frame, it is possible to reduce waste of cost.

[5] The progressive spectacles design sheet mask measurement jig of the present invention [5] is the progressive spectacles design sheet mask measurement jig according to any one of the present inventions [1] to [4]. The pair of binocular sheet masks symmetrical with respect to a line are affixed to the base sheet at an interval that can be affixed to the front surface of the dummy lens of each of the eyes of the spectacle frame (for example, simultaneously in one operation). It is characterized by being attached.

In this device, the sheet mask is attached to the front surface of the dummy lens of each of the eyes of the eyeglass frame (for example, both eyes simultaneously by a single attaching operation) at the center line in the horizontal direction of the base sheet. It is affixed to the base sheet as a pair of sheet masks that are line-symmetric.
According to this, when the sheet mask is affixed to the front surface of the dummy lens of each of the eyes of the eyeglass frame, the examiner tilts the sheet mask of each eye from the horizontal direction or the distance eye. Since it can be attached without causing a deviation in the height of the point, the operation method for pasting the processing seal separately for both eyes as in the past (for example, with one pasting operation) It can be pasted at the same time. Therefore, even an inexperienced engineer can perform the sheet mask pasting operation accurately and quickly at the store, and the inspection time can be greatly shortened.

[6] The progressive spectacle design sheet mask measurement jig of the present invention [6] is the progressive spectacle design sheet mask measurement jig of the present invention [5], wherein the base sheet is the binocular eye of the spectacle frame. A pair of positioning through holes for attaching the pair of binocular sheet masks (for example, simultaneously in one operation) to the front surface of the dummy lens.

In this device, on the outside of the pair of binocular sheet masks that are arranged in line symmetry with the center line in the left-right direction of the base sheet, the sheet mask pasting device for progressive eyeglass design to be described later is attached to the sheet mask pasting device. The positioning through hole for engaging the base sheet is provided. Therefore, the sheet mask attached to the base sheet is reliably placed on a sheet mask attaching portion of the progressive spectacle design sheet mask attaching device described later.
According to this, in the pasting operation of the sheet mask, the inspector pastes the mark point on the front surface of the dummy lens of each of the eyes of the spectacle frame and the progressive spectacle design sheet mask to be described later. A pair of binocular pair of single horizontal reference lines located on the upper side of the pair of binocular sheet masks symmetrical with respect to the center line in the left-right direction of the base sheet placed on the sheet mask attaching portion of the apparatus; (For example, both eyes simultaneously in one pasting operation) need only be pasted together so that the accuracy of the sheet mask pasting operation on the spectacle frame is greatly improved.
Further, the operation of attaching the sheet mask to the front surface of the dummy lens of each of the eyes of the eyeglass frame is simplified compared to the conventional method using the processing seal (for example, a single attachment operation). Therefore, the inspection time can be greatly shortened.

[7] The progressive spectacle design sheet mask measuring jig of the present invention [7] is the progressive spectacle design sheet mask measuring jig of the present invention [5] or [6], wherein the base sheet is the base sheet of the base sheet. It has a perforation for separating it into two left and right at the center line in the left-right direction.

In this device, the base sheet is attached to the front surface of each dummy lens of the both eyes of the spectacle frame, and is separated into two at the center line in the left-right direction of the base sheet, thereby The peeling operation with the sheet mask can be performed separately for both eyes.
According to this, in the operation of removing the sheet mask from the surface of the base sheet, the inspector is more efficient when the base sheet is separated into both eyes because the peeling operation is simplified. Greatly improved.

[8] The progressive spectacles design sheet mask pasting apparatus according to the present invention [8] includes the progressive spectacles design sheet mask measuring jig according to any one of the present inventions [1] to [7]. A progressive spectacle design sheet mask affixing device used when affixing to the front surface of each dummy lens, a base sheet fixing pin for engaging the base sheet with the sheet mask affixing device, and the spectacle frame A sheet mask affixing unit for affixing the sheet mask along the curved surface shape of the front surface of the dummy lens, and the front surface of the dummy lens for each of the eyes of the spectacle frame. When placing horizontally on the sheet mask affixing portion, contact between the bridge of the eyeglass frame and the sheet mask affixing device Characterized in that it comprises a bridge avoiding portion for avoided.

  In this device, in the work of attaching the base sheet to the front surface of the dummy lens of the spectacle frame, the inspector uses a different measuring means (for example, the Wada distance eyepoint height determination method described above) in advance. The base sheet on which the sheet mask is attached is fixed to the pair of base sheet of the sheet mask attaching device when the sheet mask is accurately attached to the position of the distance eye point marked. With the pins firmly engaged, the front surfaces of the dummy lenses of the two eyes of the eyeglass frame are firmly pushed horizontally into the pair of binocular sheet masks placed on the sheet mask attaching portion. Can be pasted.

  According to this, when the inspector pushes the front surface of the dummy lens of each of the two eyes of the spectacle frame into the sheet mask attaching portion of the sheet mask attaching device, the two eyes of the spectacle frame are always The dummy lens can be attached with a uniform pressure to the curved surface shape of the front surface. Further, when the front surfaces of the dummy lenses of the two eyes of the eyeglass frame are pushed horizontally into the sheet mask attaching portion of the sheet mask attaching device, it is possible to cope with any shape of the bridge of the eyeglass frame. In addition, the sheet mask pasting operation on the front surface of the dummy lens of each of the eyes of the eyeglass frame is simplified as a single pasting operation as compared with the conventional method using the processing seal. The time can be greatly shortened.

Schematic which shows the spectacles frame 100 in which the dummy lens 120 entered. 2 is a schematic plan view showing a basic structure of a progressive power lens 200. FIG. FIG. 2 is a schematic plan view showing a state in which a progressive power lens 200 is framed into a spectacle frame 100. FIG. 4 is a schematic cross-sectional view showing a relationship between a distance line of sight and a near line of sight passing through the spectacle surface of the spectacle frame 100 and the downward rotation amount of the eyeball. (A) is a front view, and (B) is a near view (downward view). Explanatory drawing which shows the structure of the sheet mask measurement jig | tool 300 for progressive spectacles design concerning embodiment. XX sectional drawing of FIG. Explanatory view showing a state in which a sheet is attached to the mask measurement fixture 300 in front of the dummy lens 120 of the eyeglass frame 100 in the embodiment. FIG. 8 is an explanatory diagram showing a state in which it is confirmed whether or not a distance eye point (FEP) and a pair of single horizontal reference lines 30 match with the eyeglass frame 100 of FIG. 7 attached. Explanatory drawing which shows the appearance (spot image A ") on the retina of the reference line (object point A) when it sees with the spectacles frame 100 with the sheet mask 330 in embodiment. Explanatory drawing which shows the relationship between the pupil diameter g and the spot image A "formed on a retina in embodiment. In FIG. 9, it is explanatory drawing which shows how the reference lines 30-38 appear on a retina when the width | variety of a pupil diameter is changed. In the embodiment, when the width of the pupil diameter g is 3.5 mm, the distance between the two line centers adjacent to the line widths of the respective reference lines 30 to 38 arranged in the sheet mask 330 is optimized. FIG. It is the schematic which shows the structure of the sheet mask sticking apparatus 400 for progressive spectacles designs concerning embodiment, (A) is a top view, (B) is XI-XI sectional drawing of (A). Explanatory drawing which shows the mark (P mark) which discriminate | determines the attitude | position of the sheet mask 330 in embodiment. Schematic which shows the process of affixing the base sheet 310 on which the sheet mask 330 of one pair of eyes is affixed on the front surface of the dummy lens 120 of each eye of the spectacle frame 100 with the sheet mask measuring jig 300 in the embodiment. (A) is a plan view, (B) is an XII-XII sectional view of (A). Explanatory drawing explaining the process of cut | disconnecting the base sheet 310 right and left in the horizontal direction center line 312 of the base sheet 310 in embodiment. Explanatory drawing which shows the relationship of the distance line of sight or near line of sight with respect to each horizontal reference line 30, 35-38 arrange | positioned in the seat mask 330 actually visible to the spectacles frame wearer in embodiment. Explanatory drawing which shows the relationship of the monocular pupillary distance (right eye PD and left eye PD) of each eye with respect to the vertical reference lines 31-34 actually visible to a spectacles frame wearer in embodiment. Explanatory drawing which shows the result analyzed using the measured value with the sheet mask 330 in embodiment. Explanatory drawing which shows the line actually visible to the spectacles frame wearer in embodiment. The schematic plan view which shows the modification of the sheet mask 330 in embodiment. Schematic which shows the measurement of the downward rotation amount of the eyeball in the conventional mirror method.

Embodiments of the present invention will be described below with reference to the drawings.
In the present embodiment, the dummy lens 120 for each eye, which is provided in advance in a spectacle frame 100 purchased at a spectacle store or the like, is used as an inspection lens, and the optimum progressive band length of the progressive refraction lens 200 is based on the result. Select and design progressive glasses. The dummy lens 120 is made of an acrylic resin having a refractive index of zero.

(1. Glasses frame)
As shown in FIG. 1, the spectacle frame 100 includes frame frames 11 for both eyes surrounding the dummy lens 120 in a frame shape, a bridge 13 for connecting the frame frames 11 for both eyes, and frame frames 11 for both eyes. And a temple 12 rotatably attached via a hinge (not shown).

(2. Eyeglass lenses)
As shown in FIG. 2, the progressive-power lens 200 includes a distance portion region 21 located above, a near portion region 22 located below, and the distance portion region 21 and the near portion region 22. It has a clear vision region of the progressive zone region 23 located in between, and an astigmatism region 24 other than the clear vision region adjacent to both sides thereof. These areas are all formed seamlessly.

  The distance portion area 21 has an average power having a relatively low plus power suitable for far vision (for example, driving a car). Here, the end position of the distance portion area is defined as a distance fitting point (FFP), which is a line segment that passes through the distance fitting point (FFP) and extends in the left-right direction. The distance fitting line (FFL) is used.

  The near portion area 22 has an average power having a relatively high plus power suitable for near vision (for example, reading). Here, the position where the near portion area starts is a near fitting point (NFP), which is a line segment that passes through the near fitting point (NFP) and extends in the left-right direction. Fitting line (NFL).

  The progressive zone region 23 is suitable for intermediate viewing (for example, general indoor work such as PC monitor browsing). The length (CL) of the progressive zone region 23 is set such that the distance fitting point (FFP) or distance fitting line (FFL) of the distance portion region 21 to the near fitting point (NFP) of the near region 22 or near It is the length in the vertical direction to the fitting line (NFL), and the positive addition power is a region that progressively changes from the far fitting point (FFP) to the near fitting point (NFP) of the near vision region 22. is there.

The astigmatism region 24 is an area called an astigmatism region as described above, and when viewed through the astigmatism region 24, an object is blurred or doubled. 24, do not see the target object.
Such a progressive-power lens 200 is cast into the same shape as the dummy lens 120 of each eye that is mounted on the spectacle frame 100 in advance, and is framed in the shape of the frame frame 11 of each eye. Thus, the progressive glasses 500 that are actually worn (see FIG. 3).

(3. Sheet mask measurement jig for progressive glasses design)
A progressive spectacle design sheet mask measurement jig 300 that measures the length (L) of the downward rotation amount (or downward rotation force) of the eyeball from the far eye point to the near eye point will be described. In the following description, the “sheet mask measuring jig for progressive eyeglass design” may be simply referred to as “sheet mask measuring jig”.
As shown in FIG. 4A, a position where the distance line of sight passes through the front surface (convex surface) of the dummy lens 120 of the spectacle frame 100 in the distance vision is referred to as a distance eye point (FEP). Next, as shown in FIG. 4B, the position where the near line of sight passes through the front surface of the dummy lens 120 of the spectacle frame 100 when the eyeball rotates downward as an eyeball rotation point (R) axis in near vision. It is a near eye point (NEP). Here, the distance in the vertical direction from the far eye point (FEP) to the near eye point (NEP) on the front surface of the dummy lens 120 of the spectacle frame 100 is the length of the downward rotation amount (or downward rotation force) of the eyeball (L ).

  A sheet mask measurement jig 300 shown in FIGS. 5 and 6 was used as a jig for measuring the length (L) of the downward rotation amount (or downward rotation force) of the eyeball. The sheet mask measuring jig 300 includes a base sheet 310, a cover sheet 320, and a sheet mask 330. A pair of binocular sheet masks 330 for measuring the length (L) of the downward rotation amount (or downward rotation force) of the eyeball of the spectacle frame wearer is symmetrical with respect to the lateral center line 312 of the base sheet 310. The eyeglass frame 100 is previously affixed to the base sheet 310 at an interval at which both eyes can be affixed simultaneously to the front surface of the dummy lens 120 of each eye of the eyeglass frame 100 by a single affixing operation.

  In addition, the sheet mask 330 for each eye is attached to the front surface of the dummy lens 120 for each eye of the eyeglass frame 100 for measurement, and the dummy for each eye for the eyeglass frame 100 is measured. And an opaque region gripping part 41 for peeling off the sheet mask 330 attached to the front surface of the lens 120. At the upper position of the measurement unit 40 in the transparent region of the sheet mask 330, both eyes of the spectacle frame 100 measured in advance by another measurement means (for example, the above-described Wada distance eyepoint height determination method) are provided. A pair of binocular single horizontal reference lines 30 for overlapping and pasting the far-eye point (FEP) marked on the front surface of the dummy lens 120, and near-use for both eyes at the lower position A first horizontal reference line 35, a second horizontal reference line 36, a third horizontal reference line 37, and a fourth horizontal reference line 38 which are formed at an equal interval and are formed in a region predicted as an eye point (NEP). The first vertical reference line 31 and the second vertical reference that are opaque at equal intervals and are formed in a region where the one-eye pupil distance (right eye PD and left eye PD) of both eyes is predicted at an intermediate position. Line 32, third vertical reference line 33 and fourth droop A straight reference line 34.

  In addition, on the outside of the pair of binocular sheet masks 330 that are axisymmetrically affixed to the horizontal center line 312 of the base sheet 310, the sheet is placed on the front surface of the dummy lens 120 of each eye of the spectacle frame 100. A pair of positioning through holes 340 for engaging with the progressive spectacles design sheet mask attaching device 400 is provided so that the base sheet 310 does not move when the mask 330 is attached.

  Further, in order to facilitate an operation when the base sheet 310 is peeled off from the sheet mask 330 after the sheet mask 330 is attached to the front surfaces of the dummy lenses 120 of both eyes of the spectacle frame 100, the horizontal direction of the base sheet 310 is set. The center line 312 has a perforation structure (not shown) so that it can be easily separated.

  FIG. 7 shows a sheet mask on the front surface of each dummy lens 120 of both eyes of the spectacle frame 100 as a jig for measuring the length (L) of the downward rotation amount (or downward rotation force) of the eyeball according to the present embodiment. The state where 330 is pasted is shown. In FIG. 8, when the spectacle frame wearer wears the spectacle frame 100, the distance eyepoints of both eyes and the sheet mask 330 attached to the front surface of the dummy lens 120 of both eyes of the spectacle frame 100 are shown. A state in which the pair of binocular single horizontal reference lines 30 at the upper position of the eye overlap is shown.

  Here, the height of the single horizontal reference line 30 of the pair of opaque binoculars on the sheet mask 330 to be attached to the front surface of the dummy lens 120 of each eye of the eyeglass frame 100 is determined by the spectacle frame mounting. This is the line-of-sight passage position when the person actually looks far away with the eyeglass frame 100 attached, and the position is determined in advance by another measuring means (for example, the above Wada distance eyepoint height determination method). Has been.

  All the reference lines 30 to 38 in the sheet mask 330 have at least two conditions. As for the first condition, it is desirable that two adjacent reference lines have no overlap when projected onto the retina, or the overlap is minimal. The second condition is that the line widths of all the reference lines 30 to 38 included in the sheet mask 330 are preferably formed by straight lines that are narrower (thin) than the width of the pupil diameter.

In FIG. 9, when the spectacle frame wearer sees the object point A in front of the dummy lens 120 of each eye of the spectacle frame 100, the object point A is imaged at the image point A ′ behind the retina, which is a conjugate point. Therefore, what is actually seen is a blurred spot image A ″ projected on the retina, and the size j of the spot image A ″ can be calculated by the following equation (1). .

j = g × ((l′−k ′) ÷ l) (1)

Here, j is the size of the spot image A ″ formed on the retina, g is the width of the pupil diameter, and l ′ (el dash) is the distance from the principal point P of the eye to the image point A ′. Yes, k ′ is the distance from the principal point P of the eye to the retina, and l (el) is the distance from the object point A to the principal point P of the eye.

  Here, the width of the general pupil diameter varies from 2.9 mm to 6.5 mm (visual information processing, -physiology / psychology / bioengineering-, Kyoji Tazaki et al., Asakura Shoten, 1979). If the line width of the reference line and the distance between two adjacent line centers are calculated using equation (1), the result is as shown in FIG. For example, the case where the line width of the reference line is 1 mm, the distance between the centers of the adjacent reference lines is 3 mm, and the distance between the separations is 2 mm (inter-center distance−line width) is illustrated. At this time, if the pupil diameters are 2.5 mm, 4 mm, and 5.5 mm, respectively, the reference line widths are 1.8 mm, 2.8 mm, and 3.9 mm (see FIG. 10), respectively. Further, the separation distances are 1.2 mm, 0.2 mm, and −0.9 mm, respectively, and when the pupil diameter is 5.5 mm, a part of the adjacent reference lines overlaps each other ((D) in FIG. 11). reference). If the standard pupil diameter width is 3.5 mm and the width of the reference line necessary to satisfy the above two conditions is calculated from 0.5 mm to 2.0 mm at intervals of 0.1 mm, FIG. 12 is obtained. For example, when the line width is 0.5 mm, the distance between the centers of adjacent lines is 1.25 mm, when the line width is 1 mm, the distance between the centers of adjacent lines is 2.5 mm, and the line width is 1.5 mm. The distance between the centers of adjacent lines is 3.75 mm.

  Also, a first horizontal reference line 35 formed on the lower side of the pair of sheet masks provided for measuring the length (L) of the downward rotation amount (or downward rotation force) of the eyeball, The positions of the second horizontal reference line 36, the third horizontal reference line 37, and the fourth horizontal reference line 38 are arranged at equal intervals at the positions of the downward rotation amount (or downward rotation force) of the eyeball predicted in advance. ing. For example, the first horizontal reference line 35 is formed as a straight line parallel to a position 12 mm away from both eyes from a single horizontal reference line 30 of both eyes. The second horizontal reference line 36 is formed as a straight line parallel to a position 2 mm apart from both eyes from the first horizontal reference line 35. The third horizontal reference line 37 is formed as a straight line parallel to a position 4 mm away from both eyes from the first horizontal reference line 35. The fourth horizontal reference line 38 is formed as a straight line parallel to a position 6 mm away from both eyes from the first horizontal reference line 35. In addition, the line width of all the reference lines at this time is 0.8 mm, and is determined based on the above equation (1).

  In addition, the first horizontal reference line 35, the second horizontal reference line 36, the third horizontal reference line 37, and the fourth horizontal reference line 38 can be easily used when the spectacle frame wearer wears them. Opaque colors with different warm and cold colors are alternately arranged so that the inspector can answer by judging the position of the line. For example, the first horizontal reference line 35 is yellow, the second horizontal reference line 36 is green, the third horizontal reference line 37 is red, and the fourth horizontal reference line 38 is blue.

  In addition, the first position which is in the middle position between the pair of binocular sheet masks provided for measuring the one-eye pupil distance (right eye PD and left eye PD) of both eyes for distance vision and near vision. The vertical reference line 31, the second vertical reference line 32, the third vertical reference line 33, and the fourth vertical reference line 34 are arranged at equal intervals at positions predicted in advance in distance vision or near vision. . For example, the first vertical reference line 31 is formed as a straight line parallel to a position that is 28 mm away from each of the eyes from the horizontal center line 312 of the base sheet 310. The second vertical reference line 32 is formed as a straight line parallel to a position 30 mm away from both eyes from the horizontal center line 312 of the base sheet 310. The third vertical reference line 33 is formed as a straight line parallel to a position 32 mm away from both eyes from the horizontal center line 312 of the base sheet 310. The fourth vertical reference line 34 is formed as a straight line parallel to a position that is 34 mm away from both eyes from the horizontal center line 312 of the base sheet 310. In addition, the line width of all the reference lines at this time is 0.8 mm, and is determined based on the above equation (1).

  Further, the arrangement of the first vertical reference line 31, the second vertical reference line 32, the third vertical reference line 33, and the fourth vertical reference line 34 is the length of the downward rotation amount (or downward rotation force) of the eyeball. They are arranged in the same way as the arrangement of the horizontal references 35 to 38 for predicting the length (L). For example, the first vertical reference line 31 is blue, the second vertical reference line 32 is red, the third vertical reference line 33 is green, and the fourth vertical reference line 34 is yellow.

Next, the configuration of the progressive eyeglass design sheet mask measuring jig 300 placed on the sheet mask attaching device 400 will be described.
As shown in FIGS. 5 and 6, the sheet mask measuring jig 300 includes a base sheet 3 10, a cover sheet 320, and a sheet mask 330 that are stacked. The base sheet 310 includes the length (L) of the downward rotation amount (or downward rotation force) of the eyeball of the spectacle frame wearer necessary for determining the distance eye point and the near eye point, and both of the near vision and the near vision. In order to measure the monocular pupillary distance (right eye PD and left eye PD) of each eye, the dummy lenses 120 of both eyes of the spectacle frame 100 are axisymmetrical with respect to the center line 312 in the horizontal direction of the base sheet 310 in advance. A pair of binocular sheet masks 330 are affixed at intervals that can be affixed to the front surface simultaneously.

  The cover sheet 320 protects the adhesive force of the second adhesive layer 331 to be attached to the front surfaces of the dummy lenses 120 of both eyes of the sheet mask 330 and the spectacle frame 100. The sheet mask 330 includes a measurement unit 40 to which the base sheet 310 and the cover sheet 320 are bonded, and a gripping unit 41 that is not bonded. The measurement unit 40 of the sheet mask 330 is attached to the front surface of each dummy lens 120 of both eyes of the spectacle frame 100, and the length (L) of the downward rotation amount (or downward rotation force) of the eyeball or the piece of each of both eyes. This is a portion used when measuring the eye pupil distance (right eye PD and left eye PD). On the other hand, the grasping unit 41 determines the length (L) of the downward rotation amount (or downward rotation force) of the eyeball by the measurement unit 40 and the one-eye pupil distance (right eye PD and left eye PD) of both eyes. After the measurement, the sheet mask 330 is used for easily peeling off the front surfaces of the dummy lenses 120 of both eyes of the spectacle frame 100 without being damaged.

  Here, a first adhesive layer 311 is formed between the base sheet 3 10 and the sheet mask 330. At this time, the relative adhesion degree of the first adhesive layer 311 acts strongly on the base sheet 310 side. A second adhesive layer 331 is formed between the sheet mask 330 and the cover sheet 320. At this time, the relative adhesion degree of the second adhesive layer 331 strongly acts on the sheet mask 330 side.

The configuration of the first adhesive layer 311 or the second adhesive layer 331 regarding the progressive spectacles design sheet mask measuring jig 300 is as follows. Note that the balance of the adhesive strength of the first adhesive layer 311 or the second adhesive layer 331 can be adjusted by applying a release agent to the sheet mask 330.
The base sheet 310 is preferably a sheet containing at least one material selected from the group consisting of polyethylene terephthalate, polyolefin, polystyrene, polyvinyl chloride, and the like. The thickness of the base sheet 310 is preferably in the range of 70 μm to 80 μm.
The cover sheet 320 is, for example, a sheet containing at least one material selected from the group consisting of polypropylene, polyethylene terephthalate, polyolefin, polystyrene, polyvinyl chloride, and the like, and is preferably coated with the above-described release agent. The thickness of the cover sheet 320 is preferably in the range of 55 μm to 65 μm.
The sheet mask 330 is preferably a sheet containing at least one material selected from the group consisting of polyethylene terephthalate, polyolefin, polystyrene, polyvinyl chloride, and the like, and is preferably coated with the above-described release agent. The thickness of the sheet mask 330 is preferably in the range of 45 μm to 55 μm.

The adhesive used for the first adhesive layer 311 includes at least one material selected from the group consisting of urethane resin, acrylic resin, rubber, silicon resin, vinyl ether, and epoxy resin. A layer is preferred. Note that the thickness of the first adhesive layer 311 is preferably in the range of 25 μm to 35 μm.
The adhesive used for the second adhesive layer 331 is at least one selected from the group consisting of acrylic resin, urethane resin, acrylic resin, rubber, silicon resin, vinyl ether, and epoxy resin. It is preferable that it is a layer containing these materials. Note that the thickness of the second adhesive layer 331 is preferably in the range of 15 μm to 25 μm.

  Further, as shown in FIG. 6, the sheet mask measuring jig 300 is formed with positioning through holes 340 penetrating the base sheet 310 and the cover sheet 320 in the vicinity of both end edges. The positioning through-hole 340 includes the base sheet 310 to which the sheet mask 330 is attached and the sheet mask attachment when the sheet mask measurement jig 300 is placed on the sheet mask attachment unit 420 of the sheet mask attachment device 400. This is provided to engage the pair of base sheet fixing pins 440 of the device 400.

(4. Sheet mask pasting device for designing progressive glasses)
Next, the configuration of the sheet mask attaching device 400 that attaches the sheet mask 330 to the front surfaces of the dummy lenses 120 of both eyes of the spectacle frame 100 will be described.
As shown in FIG. 13 (FIGS. 13A and 13B), the sheet mask affixing device 400 is provided on the upper surface of the spectacles holding base 410 and the spectacles holding base 410. A bridge avoiding unit 430 (shown as a space in FIG. 13B), which is important when the front surfaces of the pair of binocular sheet mask attaching units 420 and the dummy lenses 120 of both eyes of the spectacle frame 100 are placed horizontally. And a pair of base sheet fixing pins 440 that engage with the positioning through holes 340 of the sheet mask measuring jig 300. The shape of the pair of base sheet fixing pins 440 engaged with the positioning through holes 340 of the sheet mask measuring jig 300 is a cylindrical shape having a diameter of 5 mm to 7 mm, and from 5 mm with the sheet mask jig mounting surface 411 as a reference plane. It is preferable that it is high in the range of 10 mm.

  The spectacles holder 410 has a sheet mask jig placement surface 411 that faces the front surface of the dummy lens 120 of each eye of the spectacle frame 100 when the spectacle frame 100 is placed on the sheet mask attachment unit 420. The sheet mask jig mounting surface 411 has a pair of sheets that can accommodate a pair of sheet mask attaching portions 420 at positions facing the dummy lenses 120 of both eyes of the spectacle frame 100. A rectangular bridge avoiding surface 413 having an upper surface at a position lower than its height in a region sandwiched between the mask attaching portion forming surface 412 and the pair of sheet mask attaching portion forming surfaces 412 for forming the bridge avoiding portion 430. And have. In addition, it is preferable that the depth of the rectangular bridge avoidance surface 413 is at a low position in the range of 5 mm to 9 mm with the sheet mask jig placement surface 411 as a reference surface. The width of the rectangular bridge avoidance surface is preferably in the range of 28 mm to 32 mm.

The sheet mask attaching part 420 is a rectangular low-resilience elastic material that can be stored in each of the pair of sheet mask attaching part forming surfaces 412. As the low resilience material, a material having an appropriate elasticity without damaging the surfaces of the dummy lenses 120 of both eyes of the spectacle frame is preferable. For example, urethane is used. The thickness of the rectangular low-resilience elastic material that can be stored in each of the pair of sheet mask attachment portion forming surfaces 412 is preferably in the range of 4 mm to 6 mm.
In addition, a rectangular bridge avoidance surface 413 sandwiched between a pair of sheet mask attaching portion forming surfaces 412 for forming the bridge avoidance portion 430 is symmetrical about the center of the bridge 13 of the spectacle frame 100 in the left-right direction. An eyeglass frame centering scale portion 450 for alignment is formed.

  The pair of base sheet fixing pins 440 are formed on the outside of the pair of sheet mask affixing portions 420 so as to engage with the pair of positioning through holes 340 in the base sheet 310 to indirectly connect the sheet mask 330. Secure to.

(5. Method of measuring the downward rotation amount (or downward rotation force) of the eyeball)
Next, a sheet mask measuring jig 300 is attached to the front surface of the dummy lens 120 of each eye of the spectacle frame 100 using the sheet mask attaching device 400, and each eye of the eyeglass frame 100 is attached. Using the sheet mask 330 attached to the front surface of the dummy lens 120, the length (L) of the downward rotation amount (or downward rotation force) of the eyeball and the monocular pupils of both the far vision and the near vision both eyes A measurement process for measuring the distance (right eye PD and left eye PD) will be described.

(5-1. Sheet mask pasting step)
As shown in FIG. 14, the sheet mask 330 has marks 39 such as asymmetric symbols for determining the sheet mask 330 to be attached in a correct posture on the sheet mask jig placement surface 411 of the sheet mask attaching device 400. (See P mark in FIG. 14). The inspector confirms the position of the mark 39 when placing the sheet mask 330 on the sheet mask affixing device 400, a pair of positioning through holes 340 in the sheet mask measurement jig 300, and the sheet mask affixing device 400 pairs of base sheet fixing pins 440 are engaged.

  Next, the cover sheet 320 of the sheet mask measurement jig 300 is peeled off, and the second adhesive layer 331 of the sheet mask 330 is exposed. Then, a mark is placed on the front surface of each dummy lens 120 of both eyes determined in advance by another measurement means (for example, the above-described Wada distance eyepoint height determination method). Confirm that the distance eye point made coincides with a pair of binocular single horizontal reference lines 30 located on the upper side of the sheet mask 330 (FIG. 15A), and maintain that state. The front surfaces of the dummy lenses 120 of both eyes of the eyeglass frame 100 are pressed against the low resilience material of the pair of sheet mask attaching portions 420 in the direction of the arrow (↓) in FIG. Thereby, the sheet mask 330 is bonded along the curved surface of the front surface of each dummy lens 120 of both eyes via the second adhesive layer 331 (not shown).

  Next, as shown in FIG. 16, the sheet mask 330 attached to the front surface of the dummy lens 120 of each eye of the spectacle frame 100 and the base sheet 310 are separated. At this time, the first adhesive layer 311 between the sheet mask 330 and the base sheet 310 remains on the base sheet 310 and does not remain on the surface of the sheet mask 330. As a result, the eyeglass frame 100 with the sheet mask 330 attached to the front surface of the dummy lens 120 of each eye as shown in FIG. 7 is obtained, and the length (L) of the downward rotation amount (or downward rotation force) of the eyeball is obtained. Measurement is possible.

(5-2. Measurement process)
Next, a measurement process for measuring the length (L) of the downward rotation amount (or downward rotation force) of the eyeball using the sheet mask 330 attached to the front surface of the dummy lens 120 of the spectacle frame 100 will be described.
The spectacle frame wearer wears the spectacle frame 100 with the sheet mask 330 attached to the front surface of the dummy lenses 120 of both eyes, and confirms the line-of-sight position when viewed from a distance (see FIG. 8). Specifically, the eyeglass frame 100 with the sheet mask 330 affixed to the front surface of the dummy lenses 120 of both eyes is viewed from the front, and the line of sight of both eyes is above the sheet mask 330. It is confirmed by a subjective measurement method that it is seen to overlap with a single horizontal reference line 30 of a pair of eyes at the position.

  Next, in this state, look at the mirror target placed at the near vision working distance. Then, an answer is given as to which position of the pair of binocular horizontal reference lines 35 to 38 at the lower position of the sheet mask 330 the line of sight of both eyes at this time passes. In the present embodiment, the yellow first horizontal reference line 35, the green second horizontal reference line 36, and the red Since the third horizontal reference line 37 and the blue fourth horizontal reference line 38 are formed, any color of the horizontal reference lines 35 to 38 (or two adjacent horizontal lines). Ask the eyeglass frame wearer if they will pass (between the reference lines). At this time, between the pair of binocular single horizontal reference line 30 at the upper position of the sheet mask 330 and the selected horizontal reference line at the lower position or two adjacent horizontal reference lines. The distance to the position is the length (L) of the downward rotation amount (or downward rotation force) of the eyeball (see FIG. 17). For example, if the line that overlaps the line of sight when the spectacle frame wearer looks downward is the red third horizontal reference line 37, the length (L) of the downward rotation amount (or downward rotation force) of the eyeball Is 16 mm.

Next, the monocular pupillary distance (right eye PD and left eye PD) of both eyes in the distance view and the near view is measured by the sheet mask 330 attached to the front surface of the dummy lens 120 of each eye of the eyeglass frame 100. The measurement process to measure is demonstrated.
First, a method of analyzing the one-eye pupil distance (right eye PD and left eye PD) of both eyes in distance vision will be described. A spectacle frame wearer wears the spectacle frame 100 with the sheet mask 330 attached to the front surface of the dummy lens 120 of each eye, and confirms the position of the distance line of sight (see FIG. 8). Specifically, the eyeglass frame 100 with the sheet mask 330 affixed to the front surface of the dummy lens 120 of each eye is worn in a front view, and the line of sight of both eyes is positioned above the sheet mask 330. It is confirmed that it passes through a single horizontal reference line 30 of a pair of eyes in

  Next, the face position (or head position) is such that when the spectacle frame wearer views from a distance, the line of sight of both eyes can see a plurality of binocular pair of vertical reference lines 31 to 34 in the middle of the sheet mask 330. Is adjusted to check which position on the vertical reference lines 31 to 34 passes from that state. In the present embodiment, the first vertical reference line 31 that is opaque and is formed at an equal interval formed in a region predicted to be the one-eye pupil distance (right eye PD and left eye PD) of each eye, and the second color of red. The vertical reference line 32, the green third vertical reference line 33, and the yellow fourth vertical reference line 34 are formed, so that the spectacle frame wearer can select both of the vertical reference lines 31 to 34. Ask the eyeglass frame wearer which vertical reference line (or between two adjacent vertical reference lines) the eyes of each eye will see overlapping. It should be noted that the position of the distance eye point is obtained by a calculation formula described later using the monocular pupil distance (right eye PD and left eye PD) of each eye obtained here.

  Next, a method for measuring the one-eye pupil distance (right eye PD and left eye PD) of both eyes in near vision will be described. In the case of near vision, similarly to the distance vision, the spectacle frame wearer wears the spectacle frame 100 with the sheet mask 330 attached to the front surface of the dummy lens 120 and looks in front, and both eyes It is confirmed that the line of sight of the eye is overlapped with the pair of binocular single horizontal reference lines 30 at the upper position of the sheet mask 330.

  Next, the face position (or head position) is set so that a plurality of vertical reference lines of a pair of both eyes can be seen when the eyeglass frame wearer is looking near, and the line of sight of each of the eyes is in the middle of the sheet mask 330. After the adjustment, the spectacle frame wearer is informed of which of the vertical reference lines 31 to 34 the position of which reference line appears to overlap. In the present embodiment, as in the case of far vision, the first vertical blue color that is formed at equal intervals and is formed in a region that is predicted as the one-eye pupil distance (right eye PD and left eye PD) of both eyes. Since the reference line 31, the red second vertical reference line 32, the green third vertical reference line 33, and the yellow fourth vertical reference line 34 are formed, the spectacle frame wearer can use these vertical reference lines. Of any of 31 to 34, the spectacle frame wearer is asked to answer which vertical reference line (or between two adjacent vertical reference lines) the line of sight of each eye looks to overlap. The near eye point position is calculated by using the relative value of the binocular pupil distance (right eye PD and left eye PD) of both eyes obtained here, as in the distance eye point position. Ask for.

Next, a method for obtaining the monocular pupillary distance (right eye PD and left eye PD) of both eyes in distance vision and near vision used in actual eyeglass design will be described.
The monocular pupillary distance (right eye PD and left eye PD) for both eyes used in the eyeglass design is the relative value of the monocular pupillary distance for each eye (RPD and LPD) determined by the above-mentioned measurement for far vision and near vision. ) And the absolute values of the distance between the near and near pupils (binocular PD) obtained in advance by another measuring means (for example, a PD meter), the following equations (2) and (3) (See FIG. 18).

Right eye PD = Binocular PD × (RPD ÷ (RPD + LPD)) (2)
Left eye PD = Binocular PD-Right eye PD (3)

For example, in the case of far vision, if the binocular PD for far vision measured with a PD meter is 60 mm, the RPD measured with the sheet mask 330 is 30 mm, and the LPD is 28 mm, the right eye for far vision from equation (2). The PD is 31 mm, and the left eye PD is 29 mm from the equation (3).
On the other hand, in the case of near vision, if the binocular PD for near vision measured with a PD meter is 56 mm, the RPD measured with the sheet mask 330 is 28 mm, and the LPD is 29 mm, it is farther from the equation (2). The right eye PD in viewing is 27.5 mm, and the left eye PD is 28.5 mm from the expression (3) (see FIG. 19).

Here, a reference line that is actually visible to a spectacle frame wearer when the spectacle frame 100 with the sheet mask 330 attached to the front surface of each dummy lens 120 of both eyes will be described.
When the spectacle frame wearer wears the spectacle frame 100 with the sheet mask 330 attached to the front surface of the dummy lenses 120 of both eyes and sees it in near distance, the first horizontal reference line 35 and the second horizontal reference line 36 are displayed. The third horizontal reference line 37 and the fourth horizontal reference line 38 appear to be more blurred than the actual reference line width (reflective color). For example, when the pupil diameter is 3.5 mm, as shown in FIG. 20, the first horizontal reference line 35, the second horizontal reference line 36, the third horizontal reference line 37, and the When the horizontal width of each of the four horizontal reference lines 38 is 0.8 mm and the distance between the centers of the respective reference lines is 2 mm, the first horizontal reference line 35, the second horizontal reference line 36 projected onto the retina, The line widths of the reflected colors of the third horizontal reference line 37 and the fourth horizontal reference line 38 are 2 mm wide blurred lines (the retinal image 351 of the first horizontal reference line 35 and the second horizontal reference line 36. The retinal image 361, the retinal image 371 of the third horizontal reference line 37, and the retinal image 381 of the fourth horizontal reference line 38) are visible (FIG. 20A). The first horizontal reference line 35, the second horizontal reference line 36, the third horizontal reference line 37, and the fourth horizontal reference line 38 have a line width of 1 mm, and the distance between the centers of the respective reference lines is 2. When the thickness is 0.5 mm, the line widths of the reflected colors of the first horizontal reference line 35, the second horizontal reference line 36, the third horizontal reference line 37, and the fourth horizontal reference line 38 projected onto the retina are: 2.5 mm wide blurred lines (retinal image 351 of the first horizontal reference line 35, retinal image 361 of the second horizontal reference line 36, retinal image 371 of the third horizontal reference line 37, and fourth horizontal reference) It appears as a retinal image 381) of the line 38 (FIG. 20B).

  On the other hand, the object in the outside world when viewing near is the first horizontal reference line 35, the second horizontal reference line 36, the third horizontal reference line 37, and the fourth horizontal reference line on the sheet mask 330. It can be seen through 38 gaps (transmitted light). For example, the first horizontal reference line 35, the second horizontal reference line 36, the third horizontal reference line 37, and the fourth horizontal reference line 38 have a line width of 0.8 mm, and the distance between the centers of the respective reference lines. When is 2 mm, at least two adjacent horizontal reference lines can be reliably seen.

(6. Effects of Embodiment)
According to the above embodiment, the following effects can be obtained.
In the present embodiment, a pair of opaque binocular single horizontal reference lines 30 located on the upper side of the seat mask 330 with the spectacle frame 100 containing the dummy lens 120 actually purchased by the spectacle frame wearer. The first horizontal reference line 35, the second horizontal reference line 36, the third horizontal reference line 37, and the fourth opaque reference line 35, which are opaque at equal intervals at the lower position of the sheet mask 330 indicating the near eye point. Using the horizontal reference line 38 and the first vertical reference line 31, the second vertical reference line 32, the third vertical reference line 33, and the fourth vertical reference line 34 which are opaque at equal intervals in the middle position. The length (L) of the downward rotation amount (or downward rotation force) of the eyeball and the one-eye pupil distance (right eye PD and left eye PD) of both eyes in distance vision and near vision are measured.
According to this, the examiner does not depend on the measurement values such as the spectacle wearing distance and the forward tilt angle of the spectacle frame wearer when determining the distance eye point and the near eye point which are most important for the design of progressive glasses. Since measurement can be performed, measurement errors can be reduced. In addition, since the eyeglass parameters necessary for the spectacle design of the progressive eyeglasses are two items, even an inspector with little practical experience can easily obtain highly accurate measurement values.

  The eyeglass frame wearer has a line of sight when the eyeglass frame 100 with the sheet mask 330 attached to the front surface of the dummy lens 120 of each eye is attached to the horizontal reference lines 35 to 38 or the vertical reference lines 31 to 31. It is only necessary to determine whether it is closest to 34. Therefore, measurement can be performed more easily without placing a burden on the spectacle frame wearer (a subjective measurement method).

  Moreover, by using together with the above-described mirror method, the examiner can confirm the center of the pupil from the gap between the reference lines 30 to 38 in the eye gaze direction of the spectacle frame wearer (objective measurement method). Therefore, the length (L) of the downward rotation amount (or downward rotation force) of the eyeball and the one-eye pupil distance (right eye PD and left eye PD) of both the far vision and the near vision are described above. Since the subjective measurement method and the objective measurement method described above can be performed simultaneously, the measurement accuracy is greatly improved.

  Furthermore, in the sheet mask affixing device 400 of the present embodiment, the sheet mask affixing portion 420 is made of a low-repulsive material, so that the sheet mask affixing surface 411 is fixed to the sheet mask 330. By simply pressing the front surface of the dummy lens 120 of the spectacle frame 100, an even sticking operation can be easily performed. Therefore, the inspection time can be greatly shortened. This is particularly useful for inspectors who have little practical experience.

Further, in the present embodiment, a rectangular bridge avoiding surface 413 having a height lower than the upper surfaces of the sheet mask jig placement surface 411 and the sheet mask attaching portion 420 between the pair of sheet mask attaching portion forming surfaces 412. Is provided.
According to this, when the spectacle frame 100 is placed on the sheet mask affixing portion 420, even if the projection shape of the bridge 13 is large, it does not come into contact with the rectangular bridge avoiding surface 413. The front surface of 120 can be stably placed horizontally and is not limited by the shape of the spectacle frame.

  Further, since the sheet mask 330 has the gripping portion 41, the sheet mask 330 can be easily peeled off from the front surface of the dummy lens 120 of the spectacle frame 100 without damaging the sheet mask 330. . Therefore, it is possible to restore the spectacle frame 100 before purchase without fine adjustment of the attachment of the sheet mask 330 to the front surface of the dummy lens 120 and without the stain and damage of the spectacle frame 100.

[Modification]
In addition, this invention is not limited to the said embodiment, It cannot be overemphasized that the deformation | transformation and improvement in the range which can achieve the objective and effect of this invention are contained in the content of this invention. . For example, in the above-described embodiment, the sheet mask 330 is suitable for measuring the monocular pupillary distance (right eye PD and left eye PD) of both eyes for far vision and near vision, as shown in FIG. Thus, it can also be improved as one for measuring the one-eye pupil distance (right eye PD and left eye PD) of both eyes in far vision.

  In the above embodiment, the line width and the distance between the centers of the reference lines 30 to 38 when the most standard pupil diameter width is 3.5 mm are shown, but the present invention is not limited to this, and the above ( 1) All forms in which the formulas and the relationships in FIGS. 10 and 12 are established are included. For example, when the pupil diameter is 3.5 mm, the first horizontal reference line 35, the second horizontal reference line 36, the third horizontal reference line 37, and the fourth horizontal reference line formed on the sheet mask 330. 38, when the distance between the centers of the lines is 2 mm, the line width is 0.8 mm. When the pupil diameter is 4 mm, the distance between the centers of the lines is 2 mm, and the line width is 0.715 mm. .

  In the above embodiment, the first horizontal reference line 35, the second horizontal reference line 36 for measuring the length (L) of the downward rotation amount (downward rotation force) of the eyeball formed on the sheet mask 330, A first horizontal reference line 37 and a fourth horizontal reference line 38 and a first eye distance (right eye PD and left eye PD) for measuring the distance between one eye in both distance vision and near vision (right eye PD and left eye PD). The vertical reference line 31, the second vertical reference line 32, the third vertical reference line 33, and the fourth vertical reference line 34 are formed in different colors, but they are formed in the same color. Also good. According to this, since the kind of ink can be reduced, cost reduction can be achieved.

  The progressive spectacle design sheet mask measuring jig and the progressive spectacle design sheet mask pasting device of the present invention are equipped with a spectacle frame that is actually purchased in the preparation of spectacles for a progressive power lens, As a progressive spectacles design sheet mask measuring jig and a progressive spectacles design sheet mask pasting device capable of measuring eye points easily and inexpensively with high accuracy, they can be widely used in spectacle stores and the like.

DESCRIPTION OF SYMBOLS 100 ... Eyeglass frame, 120 ... Dummy lens, 11 ... Frame frame, 12 ... Temple, 13 ... Bridge, 200 ... Progressive power lens, 21 ... Distance portion area, 22 ... Near portion area, 23 ... Progression zone area, 24 ... Astigmatism region, 300 ... Sheet mask measuring jig, 310 ... Base sheet, 311 ... First adhesive layer, 312 ... Center line in the left-right direction of base sheet, 320 ... Cover sheet, 330 ... Sheet mask, 331 ... Second adhesive layer, 340 ... positioning through-hole, 331 ... second adhesive layer, 351 ... retinal image of first horizontal reference line, 361 ... retinal image of second horizontal reference line, 371 ... third horizontal Reference line retinal image 381... Fourth horizontal reference line retinal image 30. Single horizontal reference line 31. First vertical reference line 32. Second vertical reference line 33. Vertical quasi-line, 34... Fourth vertical quasi-line, 4-1 ... fifth vertical quasi-line, 35 ... first horizontal reference line, 36 ... second horizontal reference line, 37 ... third horizontal reference line, 38 ... fourth horizontal quasi-line, 39 ... mark , 400: Progressive eyeglass design sheet mask attaching device, 410: Eyeglass holding table, 411 ... Sheet mask jig placement surface, 412 ... Sheet mask attaching portion forming surface, 413 ... Bridge avoidance surface, 420 ... Sheet mask attaching Attaching part, 430 ... Bridge avoiding part, 440 ... Base sheet fixing pin, 450 ... Eyeglass frame centering scale part, 40 ... Measuring part, 41 ... Gripping part, CL ... Length of progressive zone of progressive power lens, FEP ... Distance eye point, FFP ... distance fitting int, FFL ... distance fitting line, L ... Length of eyeball downward rotation (or downward rotation force), NEP ... near eye point, NFP ... near eye Tsu starting point, NFL ... fitting line for the near

Claims (8)

Progressive eyeglass design sheet mask used to measure the position of a distance eye point and a near eye point by attaching a pair of binocular sheet masks to the front surface of each dummy lens of both eyes of a spectacle frame containing a dummy lens A measuring jig,
A pair of binocular single horizontal reference lines that are located above the sheet mask and match the height of the distance eyepoint of each eye;
A plurality of binocular pair of vertical reference lines located in the middle of the sheet mask and configured in different colors for measuring the monocular pupillary distance of each eye;
A pair of binocular pair of horizontal references located under the sheet mask and configured in different colors for measuring the vertical distance from the far eye point to the near eye point of both eyes A sheet mask measuring jig for progressive spectacle design, comprising: In the progressive spectacles design sheet mask measurement jig according to claim 1,
The sheet mask is
A measuring unit that can be attached to the front surface of the dummy lens of each of the eyes of the spectacle frame and can maintain transparency when being attached to the dummy lens of the spectacle frame;
A progressive eyeglass comprising: a gripping part capable of easily peeling off the sheet mask from the front surface of the dummy lens of the spectacle frame after obtaining the measurement values relating to the distance eyepoint and the near eyepoint Sheet mask measurement jig for design. In the sheet mask measuring jig for progressive glasses design according to claim 1 or 2,
The measurement unit of the sheet mask includes a pair of binocular single horizontal reference lines, a plurality of binocular pair of vertical reference lines, and a pair of binocular pair of horizontal reference lines having a pupil diameter. A sheet mask measuring jig for designing progressive glasses, characterized in that it is made of an opaque line that is narrower than the width. In the progressive spectacles design sheet mask measuring jig according to any one of claims 1 to 3,
The sheet mask measuring jig for progressive spectacles design, wherein the sheet mask has a mark for being attached in a correct posture when being attached to the front surface of the dummy lens of each of the two eyes of the eyeglass frame. In the sheet mask measuring jig for progressive glasses design according to any one of claims 1 to 4,
The pair of binocular sheet masks that are symmetrical with respect to the center line in the left-right direction of the base sheet are attached to the base sheet at intervals that can be attached to the front surface of the dummy lens of each of the eyes of the spectacle frame. A sheet mask measuring jig for designing progressive glasses. In the progressive spectacles design sheet mask measurement jig according to claim 5,
The progressive spectacle design sheet, wherein the base sheet includes a pair of positioning through-holes for attaching the pair of binocular sheet masks to the front surface of the dummy lens of each of the eyes of the spectacle frame. Mask measurement jig. In the sheet mask measuring jig for designing progressive glasses according to claim 5 or 6,
The sheet mask measuring jig for progressive spectacles design, wherein the base sheet has a perforation for separating the base sheet into left and right at the center line in the left-right direction of the base sheet. A sheet mask pasting device for progressive eyeglass design used when the sheet mask measuring jig for progressive eyeglass design according to any one of claims 1 to 7 is attached to the front surface of each dummy lens of each of the eyes of the eyeglass frame. Because
A base sheet fixing pin for engaging the base sheet with the sheet mask attaching device;
A sheet mask attaching unit for attaching the sheet mask along the curved surface shape of the front surface of the dummy lens of the spectacle frame;
When the front surface of the dummy lens of each of the two eyes of the spectacle frame is horizontally placed on the sheet mask affixing portion of the sheet mask affixing device, the bridge of the spectacle frame and the sheet mask affixing device A sheet mask pasting device for designing progressive glasses, comprising a bridge avoiding unit for avoiding contact with the progressive spectacles.