KR20040093634A - Optometric Apparatus - Google Patents

Abstract

PURPOSE: An optometric apparatus is provided to subjectively examine a refractive power of an eye of an examinee and carry out a near vision examination in a high accuracy. CONSTITUTION: An optometric apparatus(1) comprises a pair of lens chamber units(60) each of which includes a chassis, an examination window(61) made of a transparent member and mounted on the chassis, and a lens disk on which an optical element is disposed, wherein the lens disk is arranged in such a manner that the lens disk is rotatable in the chassis; and an attachment member for attaching the examination windows to the chassis of the lens chamber units in such a manner that the examination windows are attachable/detachable to/from the chassis. Each of the chassis of the lens chamber units is divided into a main body cover and a disk cover. The lens disk is arranged in the main body cover in such a manner that the lens disk is rotatable. The examination window is mounted on the disk cover.

Description

Optometry Apparatus {Optometric Apparatus}

The present invention relates to an optometry device which subjectively inspects (measures) the refractive power of the subject's eye.

Optical elements such as spherical lenses and columnar lenses are placed in front of the subject's eyes, and the optically arranged optical elements are shown in front of them to visually inspect (measure) the refractive power (vision) of the eye. An optometry device is known. Such an optometry device arranges a plurality of lens disks in which various optical elements are arranged in a chassis of a left and right lens chamber unit each having an inspection window, and rotates the lens disk by a motor to rotate the optical elements. To be replaced.

In such an optometry, the temperature in the chassis of the lens chamber unit is higher than the external temperature due to heat generation of the motor for rotating the lens disk. In this state, moisture and oil containing dust vaporize, the vaporized moisture and oil condensate inside the inspection window, and the optical element disposed on the lens disk is also contaminated. These contaminations become a factor that makes it difficult for the examinee to see the targets, and affects the test results.

However, in the conventional optometry, in order to clean the inside of the contaminated inspection window and the optical elements, it is necessary to remove the entire chassis cover of the lens chamber unit. Since such a peeling operation is difficult, a professional, such as a serviceman, removes and cleans | collects on-site normally. This is very poor in efficiency.

An object of the present invention is to provide an optometry device which can easily clean an inspection window and an optical element.

1 is a schematic configuration diagram of an optometry system including an optometry device of the present embodiment.

2 is a schematic configuration diagram of the present optometry device.

3 is a schematic configuration diagram of the present optometry device.

4 is a schematic configuration diagram of a disc cover.

5 is a schematic configuration diagram of a moving mechanism part of an optometry.

6 is a schematic configuration diagram of a controller.

7 is a schematic configuration diagram of a transmitter.

8 is a schematic block diagram of a control system of the present optometry system.

9 is a diagram for explaining the principle for obtaining the runaway angle and the PD correction distance.

10 is a diagram showing a diffusion state of a control signal by a diffusion unit.

In order to solve the said subject, this invention is characterized by having the following structures.

In the optometry according to the present invention, the chassis has a chassis, an inspection window 61 made of a transparent member is installed in the chassis, and the lens disk 64 in which the optical elements 65 are arranged to be replaced in the inspection window is disposed in the chassis. A pair of left and right lens chamber units 60 rotatably disposed within the lens chamber 60; And an attachment member 62b that attaches and detaches the inspection window to the chassis of the lens chamber unit.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described based on drawing. 1 is a schematic configuration diagram of a system including an optometry device according to the present embodiment. 2 and 3 are schematic configuration views of the optometry from the inspector's side.

The optometry main body 1 has a pair of left and right symmetrical lens chamber units 60 each having an inspection window 61 and a moving unit 6 for suspending (holding) the left and right lens chamber units 60. The moving unit 6 has a moving mechanism portion 40 having a slide mechanism for adjusting the distance between the left and right lens chamber units 60 and a runaway mechanism for adjusting the runaway angle (angled in) of the left and right lens chamber units 60 (Fig. 5). Reference). In addition, the main body 1 is supported above the table 10 by the support arm 4 provided in the table 10. As shown in FIG. Then, by operating the vertical movement switch 11, the height position of the ceiling plate of the table 10, that is, the height position of the main body 1, is adjusted from the driving means not shown.

The remote inspection target system 20 is placed at a position away from the main body 1 by a predetermined distance (for example, 1 m) (FIG. 1 shows a schematic configuration of the inside). The target display device 20 includes a target display part 21, a beam distributor 22, a concave mirror 23, and the like that display various targets in the device. The target light from the target time display part 21 is reflected by the mirror 23 after passing through the beam splitter 22. The sight light reflected by the mirror 23 is reflected by the beam splitter 22 and is projected through the window 24 toward the eye E of the examinee.

The rod 2 with the unit 3 attached to the near field inspection target is attached to the attachment member 8 provided on the mobile unit 6. The target display unit 3 has a near chart 3a on which several targets are drawn, and is attached to be movable (slide) in the longitudinal direction of the rod 2. The near-field chart 3a is rotatable about the axis 3b of the target time display unit, and the desired time target is displayed from the time window 3c. The height of the short-range chart 3a as specified from the time window 3c is set to be the same height as the inspection window 61. On the road 2, a scale is attached so that the distance from the eye E located in the inspection window 61 to the near chart 3a (near inspection distance) is attached.When near inspection, the near chart 3a is desired from the eye E. It can be located at a distance. In addition, the attachment member 8 can push the attached rod 2 upwards, and the rod 2 is pushed up to the position shown in FIG.

The controller 30 has a switch for operating the main body 1 and the time display device 20, a switch for automatically or manually performing the remote inspection and the near inspection. The detailed description of the controller 30 will be described later.

The receiver 5 is provided in the main body 1 in order to receive a control signal from the controller 30, and consists of a light receiving element having sensitivity to infrared light. The liquid crystal display 7 displays control signal information (for example, information such as spherical power and astigmatism power of the optical element 65 disposed in the inspection window 61, information of a timetable, etc.) from the controller 30. The relay unit 9 is intrinsic to the table 10, to which the time display device 20 and the like are connected, and sends control signals from the controller 30 received by the main body 1 to the time display device 20 and the like as necessary.

In the chassis of the left and right lens chamber units 60, a plurality of lens disks 64, in which several various optical elements (lens, etc.) 65 are arranged (holded) on the same circumference, are rotatably arranged. The lens disk 64 is rotated by the operation of the controller 30, and the various optical elements 65 are arranged in the inspection window 61 made of a transparent member. As shown in Fig. 3, the chassis of the lens chamber unit 60 is composed of a main body cover 62a and a disc cover 62b. Then, by removing the disk cover 62b from the main body cover 62a, a portion (about half) of the circumferential end of the lens disk 64 disposed therein is exposed to the outside. The part exposed to the outside from the main body cover 62a is only a part of the lens disk 64, and other mechanisms and electric systems are not exposed.

As shown in Fig. 4, the disc cover 62b is a semicircular cover having a cavity inside, and both inspection windows 61 on the examinee side and the examinee side are provided on the front and back surfaces thereof. At the upper end and the lower end of the disc cover 62b, an attachment portion 66 provided with an opening 66a for passing the screw 63 serving as an attachment means is formed. In addition, a female screw portion (not shown) for attaching the disk cover 62b is formed on the main body cover 62a side. In the case of attaching the disc cover 62b to the main body cover 62a, the screw 63 may be engaged with the female screw portion through the opening 66a of the attachment portion 66. When removing the disk cover 62b from the body cover 62a side, the screw 63 may be loosened and removed from the female screw portion. In this manner, the disc cover 62b can be easily detached.

By removing the disk cover 62b, the inside of the inspection window 61 can be easily cleaned. In addition, the optical element 65 disposed on each lens disk 64 can also be easily cleaned (since the lens disk 64 can be rotated manually with an exposed portion externally, all the optical elements 65 can be cleaned). In addition, each lens disk 64 has a normal opening (or OD lens).

In the present embodiment, the disc cover 62b provided with the inspection window 61 is detachable. However, the present invention is not limited thereto, and only the inspection window 61 can be detachable. In the configuration in which only the inspection window 61 is detachable, for example, a holder in which the transparent member (glass, plastic resin, etc.) serving as the inspection window 61 is fitted is screwed or clicked into the chassis of the lens chamber unit 60. With such a configuration, the holder and the inspection window 61 can be detachably attached. In such a configuration, all the optical elements 65 can be cleaned by operating the dial switch 31b of the controller 30 (see Fig. 6) to position the optical elements 65 disposed on each lens disk 64 on the axis of the inspection window 61 from which the optical elements 65 are removed. Can be.

In addition, the contamination adhered to the inside of the inspection window 61 is condensed by contacting the inspection window 61 where the oil and dust generated by the internal temperature of the main body 1 from the heat generation of the motor rise to the outside. It is often caused by being left intact. Therefore, dew condensation can be suppressed by setting it as the inspection window in which the inspection window of two sheets structure which forms a heat insulation layer, and the insulation wire were wired.

Next, the moving mechanism part 40 is demonstrated based on FIG. The shaft 42 fixed to the hanging plate 41 which hangs the left and right lens chamber units 60 is rotatably inserted into the hole 43a of the slide base 43. The shaft 44 for collecting the hanging plate 41 is connected to the worms 46a and 46b which are different in directions from each other via the gear 45. An eccentric shaft 51 is attached to the tip of the shaft 44, and the tip portion of the eccentric shaft 51 engages the groove 41a formed in the hanging plate 41. The worms 46a and 46b are connected to a drive means composed of a pulse motor 47 and rotate by rotation of the motor 47. By rotation of these worms 46a and 46b, the eccentric shaft 51 is rotated through the gear 45 and the shaft 44, and the suspension plate 41 is runaway. On the other hand, the slide table 43 is movable (slide) in the axial direction of the fixing guide 48, and the driving means made of the pulse motor 49 is fixed to the fixing bracket (not shown) together with the fixing guide 48. The motors 49 are connected with screws 50a and 50b of different directions, and are engaged with the female threads of the slide table 43. Then, by rotating the motor 49, the two slide stands 43 move (slide) in opposite directions to each other. By the moving mechanism unit 40 having such a mechanism, the distance and the constriction angle of the left and right lens chamber units 60 (left and right inspection windows 61) are adjusted.

Next, the controller 30 will be described with reference to FIG. The controller 30 is of a shape and size that can be handled by one hand, and is provided with a switch unit 31 for performing various operations. The switch unit 31 satisfies the inspection conditions (spherical power, astigmatism power, astigmatism axis, etc.) with the target switch group 31a for selecting a desired target from a plurality of target groups, selection of various functions and numerical input, and an inspection window 61. Dial switch 31b for arranging optical element 65 to be input, input switch 31c for inputting rudder angle measurement data, start switch 31d for program optometry, switch 31e for program transmission, and PD switch for setting (input) a pupillary distance PD 31f, a menu switch 31g for setting various inspection conditions, and the like. In addition, in the optometry of the present embodiment, the pupillary distance can be set in units of 1 mm in the range of 48 mm to 80 mm.

Further, at the tip of the controller 30, there is provided a light emitting section 32a consisting of an LED which emits infrared light serving as a control signal, and a transmitting section 32 consisting of a diffusion section 32b directly attached to the light emitting section 32a. The diffuser 32b is responsible for spreading the control signal transmission direction from the light emitting unit 32a from the front direction to the upward direction.

7 is a schematic configuration diagram of a transmitter 32. Fig. 7A is a schematic view of the diffusion portion 32b when viewed from the front, side, and bottom. Fig. 7B is a sectional view when the diffusion portion 32b is viewed from the side. Fig. 7C is a schematic diagram when the transmitter 32 is seen from the side.

The diffusion part 32b is a cylindrical optical component formed as a transparent resin material such as an acrylic resin. As shown in Fig. 7 (a), the diffusion portion 32b has a cutout surface 33 formed by cutting off and removing only the semi-circular portion of the tip. The notch plane 33 is formed so as to have an inclination angle such that the incident angle θ ₁ of the beam is equal to or greater than the threshold value so that the beam (optical signal) incident from the horizontal direction is totally reflected by the notch plane 33. Further, the cutout surface 33 is formed to have an inclination angle of less than 45 ° with respect to the axial direction (horizontal direction) of the diffusion portion 32b so that the beam reflected by the cutout surface 33 is bent upward and directed forward.

In the present embodiment, the diffusion portion 32b is formed of an acrylic resin having a refractive index n = 1.49, and when a beam passing through the acrylic resin enters the air, the incident angle θ ₁ becomes a critical angle at about 42.15 °. Therefore, the inclination angle of the notch 33 is 35 ° (incidence angle θ ₁ is 55 °) in order to guide the beam bent upward while making the incident angle θ ₁ a critical angle.

In the present embodiment, the total reflection of the beam from the horizontal direction is not limited to this by making the incident angle θ ₁ at the cutout surface 33 equal to or more than the critical angle. For example, a coating having a characteristic of reflecting infrared light total reflection or only a predetermined ratio may be applied to the cutout surface 33.

At the tip of the controller 30, a recess (not shown) for fitting the diffusion portion 32b is provided, and a light emitting portion 32a is provided at the center of the recess. As shown in Fig. 7B, a recess 34 having a predetermined depth in the axial direction is formed on the base end side of the diffusion portion 32b. The recessed portion 34 serves to insert the light emitting portion 32a into the interior when the diffusion portion 32b is inserted into the controller 30. The diffusion part 32b is easily detachable from the controller 30 by such a configuration.

When the diffusion part 32b is inserted into the control part 30, as shown in FIG.7 (c), it inserts in the state which cut notch 33 is lower. When infrared light, which serves as a control signal, is emitted from the light emitting part 32a while the diffusion part 32b is fitted to the controller 30, the upper portion of the emitted beam travels straight inside the diffusion part 32b and is directed to the outside front as it is. Further, the lower portion of the emitted beam goes straight in the diffuser 32b, and then all or part thereof is reflected by the cutout surface 33 and is directed upward.

FIG. 10 schematically shows the amount of scattering of the infrared beam serving as a control signal from the transmitter 32. FIG. As shown in Fig. 10A, the spread amount of the beam from the forward direction to the upward direction is larger than in the case where there is no diffuser 32b. On the other hand, as shown in Fig. 10B, the spread amount of the beam in the lateral direction is almost unchanged as compared with the case where there is no diffuser 32b.

In this way, by spreading the beam only in the upward direction from the front direction without diffusing the beam in all directions, the controller 30 is placed on the table 10 as shown in FIG. Even in the state, a control signal can be received by the receiving unit 5 provided on the main body 1 located above. As a result, since the controller 30 does not need to be operated toward the receiver 5, the operability and convenience are improved. In addition, by changing the attachment state of the diffuser 32b, the traveling direction of the infrared rays serving as the control signal can be changed.

In addition, the light emitting portion may be constituted of a plurality of LEDs having different installation angles. [0033] In particular, the optical member capable of deflecting a beam such as a cylindrical lens may be disposed in front of the light emitting portion, so that the light emitting portion may move upward from the front direction. The amount of dispersion of the beam may be further increased.

In the optometry system having the above configuration, the operation thereof will be described based on a schematic block diagram of the control system shown in FIG. Here, it is assumed that the subjective examination (distance-use and near-field inspection) is performed using an inspection program in which a sequence of the subjective inspection including the near-field inspection is programmed in advance. In addition, the optometry device used in this embodiment is left and right according to the case where the pupillary distance PD of the examinee is less than 54 mm when the near distance from the eye E to the near chart 3a is 35 cm in the near vision inspection. When the lens chamber unit 60 is contiguous and congested, the left and right lens chamber units 60 come into contact with each other.

First, after the examinee sits in front of the main body 1, the inspector operates the input switch 31c of the controller 30 to input the steering angle measurement data (spherical power, astigmatism power, astigmatism axis, pupil space distance, etc.) into the main body 1. When the input switch 31c is pressed, the microcomputer unit 35 of the controller 30 transmits a control signal for transmitting the steering angle measurement data from the steering angle refractive power measuring apparatus 100 to the main body 1 from the transmission unit 32. The control signal transmitted from the transmitter 32 is received by the receiver 5 of the main body 1. As shown in FIG. The microcomputer unit 70 of the main body 1 obtains the steering angle measurement data from the steering angle refractive power measuring apparatus 100 through the relay unit 9 by the control signal received by the reception unit 5, and stores it in the memory 71.

The microcomputer unit 70 moves (slides) the left and right lens chamber units 60 by the moving mechanism unit 40 so as to match the gap between the left and right inspection windows 61 with the pupil space distance of the examinee based on the input interspace distance data. In addition, the lens motor 64 is rotated by driving the pulse motor 74 based on the other angle measurement data, and the optical element 65 having a predetermined frequency is arranged in the inspection window 61. At the same time, the convenience inspection window 61 which is not used for inspection is shielded.

The inspector starts the inspection program using the start switch 31d of the controller 30. When the start switch 31d is pressed, the microcomputer unit 35 transmits a control signal for transmitting the target to the target timing setting device 20 from the transmitter 32 according to the inspection step of the inspection program. The microcomputer unit 25 of the target display device 20 receives the control signal received by the receiver 5 via the relay unit 9, and projects the target light from the target display device 21 toward the eye E based on the control signal.

The inspector operates the transmission switch 31e to advance the inspection program, performs spherical power, astigmatism power measurement, astigmatism axis measurement, and the like, and obtains a long distance correction power for the left eye and the right eye. When the program is advanced, the procedure moves to the near field inspection step. When the near field inspection step is entered, the inspection motor of the apparatus is changed from the far inspection motor to the near inspection motor.

When performing the near field inspection, the inspector horizontally pushes up the rod 2 and places the near field chart 3 in front of the inspection window 61 (eye E) as shown in FIG. The inspector moves (slides) the near chart 3 in the longitudinal direction of the rod 2 so as to be the near distance (timed distance) required by the examinee. This short distance distance is preset (35 cm in this embodiment). In the case of changing the short distance to 50cm, 70cm, or the like, the menu switch 30g of the controller 30 is operated to call the change mode of the short distance, and the corresponding close distance is selected by the dial switch 31b. When the space distance is to be changed, the PD switch 31f can be operated to call the change mode of the space distance, and the space distance can be changed (set) by the dial switch 31b. The change screen is also displayed on the display 7 of the main body 1. As shown in FIG. In addition, in the optometry of the present embodiment, the short distance can be selected at intervals of 5 cm in the range of 35 cm to 70 cm.

When the near-field inspection is selected by the controller 30 after the exchange signal to the near-field inspection mode, the microcomputer unit 70 controls the moving mechanism unit 40 based on the received near-field inspection information and the space distance information. Run and slide (slide) the left and right lens chamber units 60. In addition, drive control of the moving mechanism part 40 is performed by controlling the drive amount (pulse number) of the pulse motors 47 and 49.

In addition, the runaway and movement (slide) of the left and right lens chamber unit 60 are changed to the runaway angle corresponding to the pupillary distance of the examinee and the regular distance (distance for short distance) of the near chart 3a, and the left and right lens chamber unit 60 are mutually different. This is performed by narrowing the interval between the left and right inspection windows 61 by only approaching a predetermined distance (hereinafter referred to as PD correction). Further, the PD correction is performed because the interpupillary distance becomes narrower than the interpupillary distance at the time of the remote inspection due to congestion of the examinee's eyes during the near vision inspection.

Fig. 9 is a view for explaining the principle for calculating the congestion angle and PD correction distance corresponding to the pupillary distance of the examinee and the on-time distance of the short-range chart 3a. 104 is the eye line point, 101 is the corneal apex position (distant corneal apex position), 102 is the center of rotation of the axis 42 as shown in Fig. 5, 103 is a short distance notice on which the approximate chart 3a is placed It is a point. If the distance from the eyeline point 104 to the near point 103 is a, b and c, and the pupillary distance at the time of application is d, the runaway angle θ ₂ of the lens chamber unit 60 is expressed by the following equation ( Same as in 1).

[Equation 1]

In addition, PD correction distance e at this time is as following Formula (2).

[Equation 2]

By using the above equation, the runaway angle and the PD correction distance can be obtained. In this way, based on the pupillary distance of the examinee and the regular distance of the near-field chart, the left and right lens chamber units 60 are condensed and the PD is corrected to be arranged on the visual axis of the eye E during the near-field inspection and the inspection window 61. The optical axis of the optical element 65 can be almost coincident.

However, when the pupillary distance of the examinee is narrow, when the lens chamber unit 60 is congested and PD corrected so as to substantially coincide the optical axis of the optical element 65 with the eye axis E, the left and right lens chamber units 60 will be referred to. It may come in contact with each other. For this reason, in the optometry of the present embodiment, when the contact of the device occurs during the complete runaway, the runaway and PD correction are performed differently in the case where the contact of the device occurs.

Table 1 shows the congestion and PD correction of the lens chamber unit 60 at each interpupillary distance when the near distance is set to 35 cm in the optometry of the present embodiment. In Table 1, "congestion angle (complete)" is the required runaway angle after complete runaway, and "runaway angle (example)" is the runaway angle in this embodiment. In addition, in "PD correction distance (complete)" and "PD correction distance (example)" of Table 1, it is used by the meaning of "expansion angle (complete)" mentioned above. In addition, the "PD correction distance (limit)" shows the PD correction distance of the limit which can perform PD correction on the conditions of a runaway angle as a "runaway angle (Example)." In addition, runaway angle and PD correction distance were rounded off to 2 decimal places for convenience.

Table 1

Interspace distance (PD for long distance) Runaway angle (complete) Runaway Angle (Example) Calibration PD (complete) Calibration PD (Example) Calibration PD (limit value) Presence of contact by complete runaway operation 56 mm 4.4 ° 4.4 ° 5.6 mm 5.6 mm - radish 54 mm 4.3 ° 4.3 ° 5.4mm 5.4mm - radish 52 mm 4.1 ° 2.8 ° 3.6mm 3.6mm 4.4mm U 50 mm 3.9 ° 1.4 ° 1.8mm 1.8mm 2.6mm U 48 mm 3.8 ° 0 ° 0 mm 0 mm 0 mm U

As shown in Table 1, when the distance for short distance is set to 35 cm, when the pupillary distance (at a distance inspection) of the examinee is 54 mm or more (54 mm to 80 mm), no contact occurs even when full runaway is performed. For example, in order to perform full runaway when the space distance is 54 mm, it is necessary to set the runaway angle of the left and right lens chamber units 60 to 4.3 ° and the PD correction distance to 5.4 mm. Since the contact does not occur when the pupillary distance is 54 mm, even when the actual lens chamber unit 60 is runaway, the runaway angle can be 4.3 ° and the PD correction distance can be 5.4 mm.

In this way, based on the set short distance and the test subject's pupillary distance, if contact does not occur even after complete runaway, the lens chamber unit 60 is congested so as to substantially match the optical axis of the optical element 65 with the visual axis of the eye E. And PD correction.

On the other hand, when the pupillary distance (at a distance inspection) of the examinee is less than 54 mm, as shown in Table 1, contact is caused when complete runaway is performed so as to substantially coincide the optical axis of the optical element 65 with the visual axis of the eye E. do. In this case, the microcomputer unit 70 determines the runaway angle and the PD correction distance within the range where the lens chamber unit 60 does not contact, even if the visual axis of the eye E and the optical axis of the optical element 65 can hardly coincide with each other. Drive the moving mechanism 40. In this way, the prism action by the optical element 65 can be suppressed as long as possible.

In the present embodiment, when the pupillary distance is 54 mm, the lens chamber unit 60 can be completely run with a runaway angle of 4.3 ° and a PD correction distance of 5.4 mm. When the pupillary distance is 48 mm, the lens chamber unit 60 Cannot be driven at all. For this reason, the runaway angle and PD correction distance which can be driven in the target interspace distance (48 mm-54 mm in this embodiment) are equally divided between them, and the runaway angle for actually congesting and correcting the lens chamber unit 60 is carried out. And PD correction distance.

For example, in order to perform full runaway when the pupillary distance of the test subject is 52mm, as shown in Table 1, it is necessary to set the runaway angle of the lens chamber unit 60 to 4.1 ° and the PD correction distance to 5.2mm. In the actual lens chamber unit 60, congestion and PD correction are performed with the condensation angle of 2.8 ° and the PD correction distance of 3.6 mm. When the pupillary distance is 50 mm, the lens chamber unit 60 is runaway and PD corrected by the runaway angle of 1.4 ° and the PD correction distance of 1.8 mm. These conditions are stored in advance in the memory 71, and the microcomputer unit 70 selects and determines appropriately from the memory 71 based on the input interspace distance and the short-range inspection distance.

In the above-described embodiment, the short-range distance is described as 35 cm. However, even when the short-range distance is 35 cm or more, the same congestion and PD correction control is performed even when the lens chamber unit 60 is contacted by the pupillary distance of the examinee. .

Further, in the present embodiment, the runaway angle and PD correction distance at the interspace distance 48mm to 54mm are equally divided between them, and the runaway angle and PD correction distance are set so as to actually runaway and PD correction of the lens chamber unit 60. However, it is not limited to this. As shown in 'PD correction distance (limit value)' of Table 1, in the case of a pupil space distance in which contact occurs, the limit runaway angle and the PD correction distance of each pupil space are set, and based on the lens chamber, Unit 60 can be runaway and PD corrected. For example, when the short distance is 35 cm and the test subject's pupillary distance is 52 mm, the runaway angle is set to 2.8 ° and the PD correction distance is set to 4.4 mm which is the limit value at the runaway angle. 60 runaway and PD correction.

In addition, the prism action caused by the optical axis of the eye E and the optical axis of the optical element do not coincide with the PD correction distance because it is more effective to adjust the PD correction distance than to adjust the runaway angle. The determination may be made prior to the angle, and the adjustment may be performed.

After the congestion and PD correction of the lens chamber unit 60 are completed, the inspector performs a near vision inspection on each of the left and right eyes, checks the spherical power, and the like. By the control as described above, even when a contact occurs, the lens chamber unit 60 is runaway and PD-corrected to some extent, so that the inspection can be performed with higher accuracy than the conventional optometry device. After the short-range inspection is finished, the inspection data is printed by pressing the print switch not shown in the controller 30. The inspection program is also terminated by the signal of the print switch.

In addition, although the above-mentioned aspect demonstrated using the inspection program which performs the remote inspection and the near-field inspection in order, it is not limited to this, The case of performing only near-field inspection may be sufficient.

According to the present invention, there is an advantage in that an optometry device capable of performing near-field inspection with higher precision than a conventional optometry device is provided.

Claims (7)

With a chassis, an inspection window 61 made of a transparent member is installed in the chassis, and a lens disk 64 on which an optical element 65 is disposed to be replaced in the inspection window is rotatably disposed in the chassis. A pair of left and right lens chamber units 60; And And an attachment member (62b) for attaching and detaching the inspection window to the chassis of the lens chamber unit. The method of claim 1, The attachment member is provided with an inspection window and serves as part of the chassis of the lens chamber unit. The method of claim 2, The chassis of the lens chamber unit can be divided into a main body cover 62a and a disc cover 62b, In the body cover, a lens disk is rotatably disposed, An optometry device in which the disc cover is provided with an inspection window and also serves as an attachment member. The method of claim 3, wherein The disc cover is an optometry having a shape covering a part of the lens disc. The method of claim 4, wherein The disk cover has a semi-circular shape and has an cavity therein. The method of claim 3, wherein An optometry device, further comprising a motor (74) disposed in the main body cover to rotate a lens disk. The method of claim 1, An optometry device further comprising a motor (74) disposed within the chassis and rotating the lens disk.