JPH11267100A - Subjective ophthalmoscopic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a subjective ophthalmoscopic device capable of reducing cost by forming a lens chamber of a small diameter, and omitting unnecessary lenses or the like. SOLUTION: In a subjective ophthalmoscopic device to measure refraction factors of subject eyes subjectively by overlappedly disposing plural optical elements in a view window of a lens chamber 1, plural turret plates 10-30, a first Rekoss disk 40 to hold an optical element used for assisting optometry, and two cylinder lenses 50, 51 of a similar absolute value and inverse signs rotatably held on a measurement optical axis are provided in the lens chamber 1. Each of the plural turrent plates 10-30 has eight opening parts, at the maximum, capable of holding at least one 0 D spherical lens or one aperture, and a spherical lens, and one of the plural turrent plates 10-30 holds at least one 0 D spherical lens or one aperture, and plural spherical lenses at an interval of 0.125 D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subjective optometric apparatus for arranging a plurality of optical elements within a field window of left and right lens chambers to subjectively measure the refractive power of an eye to be examined, and more particularly to an arrangement of optical elements. The present invention relates to a subjective optometric apparatus having the following features.

[0002]

2. Description of the Related Art As a subjective optometric apparatus for subjectively measuring the refractive power of an eye to be examined, a plurality of lenses, prisms, or a shielding plate for blocking a visual field (such as a lens, a prism, or a shielding plate, is used for optometry of an eye to be inspected). An optical element to be used is hereinafter collectively referred to as an “optical element” as necessary), and a plurality of holding plates are rotatably arranged in the left and right lens chambers, and by rotating each holding plate, an arbitrary optical There has been proposed a device in which elements are arranged so as to be superimposed in a field window of each lens chamber. As a method for generating the astigmatic power in such a subjective optometric apparatus, as described in Japanese Patent Application Laid-Open No. 64-32838 by the present applicant, two cylinder lenses having substantially the same absolute value and opposite signs are used. Matching method, Tokuyohei 9-50
As described in Japanese Patent No. 5209, a system has been proposed in which an astigmatic lens is switched on the optical axis so as to be rotatable and does not require spherical correction. The former method of generating the astigmatic power by combining the cylinder lens is promising because the number of astigmatic lenses may be small, and there is no complicated astigmatic lens switching rotation mechanism, which is advantageous in terms of cost. I have.

FIG. 5 shows an arrangement of optical elements in each lens chamber in a subjective optometry apparatus employing a system for generating astigmatic power by combining the cylinder lenses. As shown in FIG. 5, in the conventional subjective optometry apparatus, a first turret plate, a second turret plate, and a first turret plate are provided in each lens chamber.
, Two rotary cylinders, and a second recos board were sequentially arranged. Each of the first turret plate, the second turret plate and the first recourse plate has 12
, And six openings were provided in the second recos board. Then, the spherical lenses are mainly held in the openings of the first and second turret plates, and the optical elements used for assisting the optometry are held in the openings of the first and second recourse plates. The plate is a rotatable disk configured similarly to the turret plate, but differs in that it holds an optical element used for assisting optometry.

In such a subjective optometry, for example, as shown in FIG. 5, a plurality of spherical lenses at 3D intervals on a first turret plate, a plurality of spherical lenses at 0.25D intervals on a second turret plate, and The required lens power was generated by arranging a −10D spherical lens and a + 10D spherical lens respectively on the Reccos plate 2 and appropriately combining them (in the case of FIG. 5, −29D to +26.875).
The lens power can be generated in the range of D, that is, the measurement range of the spherical power SPH is −29D to + 26.875D.
Is).

Conventionally, a + 0.125D spherical lens is disposed on the first and second recos plates for two reasons, as shown in FIG. The first reason is to finely adjust the spherical power. The second reason is that in the case of adopting a method of generating astigmatic power by combining cylinder lenses, it is necessary to correct the spherical component of the lens power by using a spherical lens having half the astigmatic power to be generated. Because there is. Here, since the minimum power of the astigmatic power is generally + 0.25D, half of the power is +0.125.
A spherical lens D is provided for spherical component correction. It should be noted that the + 0.125D spherical lens is disposed on both the first and second recos plates because the + 0.125D spherical lens and the other lenses disposed on the first and second recos plates are used. This is because it can be used together.

[0006]

However, in such a conventional subjective optometry apparatus, a predetermined range of lens power is generated using a spherical lens with a 3D interval or a plurality of spherical lenses with a 0.25D interval. As shown in FIG. 5, each of the first and second turret plates has 11
It was necessary to arrange two spherical lenses, which hindered the miniaturization of each turret plate. Further, as described above, the + 0.125D spherical lens is provided on the first and second recos plates so as to overlap each other, which also hinders downsizing of the first and second recos plates.

[0007] Since the turret plate and the reccos plate cannot be miniaturized in this way, the diameter of the entire lens chamber becomes large, and it becomes difficult for the examiner to observe the expression of the examinee. This has caused the subject to feel oppressed. Therefore, there has been a demand for a subjective optometry apparatus capable of reducing the number of lenses and the like disposed on a turret plate or a reccos plate and reducing the size of the lenses.

Further, it is not preferable in terms of cost to provide a + 0.125D spherical lens on the first and second recos plates so as to overlap each other. In addition, some examiners do not perform prism measurement such as eye position measurement, and such an examiner does not need a rotary prism. However, this rotary prism has a −10D lens, a + 10D lens, and a + 0.125D lens. It is difficult to omit it because it is arranged on the second recos board together with the spherical lens.
Therefore, there has been a demand for a subjective optometry apparatus which can eliminate the overlapping arrangement of the + 0.125D spherical lens and can easily eliminate unnecessary lenses and the like, thereby reducing the cost.

The present invention has been made in view of such a problem in the conventional subjective optometry apparatus, and is intended to reduce the diameter of a lens chamber and to omit unnecessary lenses and the like. It is an object of the present invention to provide a subjective optometry apparatus capable of reducing costs.

[0010]

In order to solve the above-mentioned problems in the conventional subjective optometric apparatus, the present invention according to the first aspect of the present invention comprises a plurality of optical elements in the viewing windows of the left and right lens chambers. In a subjective optometric apparatus for measuring the refractive power of an eye to be examined in a superposed arrangement, a first turret holding a plurality of turret plates and an optical element used for assisting the optometry in each of the left and right lens chambers. A turret plate, and two cylinder lenses that are rotatably held on the measurement optical axis and have the same absolute value and opposite signs, and each of the plurality of turret plates has at least one 0D spherical lens. Or one opening and up to eight openings capable of holding a spherical lens, wherein one of the plurality of turret plates has at least one 0D spherical lens or one opening; 12
It is characterized by holding a plurality of spherical lenses at 5D intervals.

The present invention described in claim 2 provides the present invention according to claim 1.
In the present invention, one of the plurality of turret plates is configured to hold at least one 0D spherical lens or one opening and a plurality of spherical lenses at 1D intervals. I have.

The present invention according to claim 3 provides the present invention according to claim 1.
Or the first turret plate holding at least one 0D spherical lens or one opening and a plurality of 8D-spaced spherical lenses, at least one 0D spherical lens or at least one 0D spherical lens. A second turret plate that holds a spherical lens or one aperture and a plurality of spherical lenses at 1D intervals, and at least one 0D spherical lens or one aperture and a plurality of spherical lenses at 0.125D intervals And a third turret plate that holds

The present invention described in claim 4 provides the present invention as defined in claim 1.
In the present invention described in any one of (1) to (3), the first recos plate may include one 0D spherical lens or one aperture, a shielding plate for blocking a visual field, a 45 ° polarizing plate, a 135 ° polarizing plate, and a red Maddox. It is configured to hold a lens, a red / green filter, a pinhole and a 6 prism / 10 prism.

The present invention according to claim 5 provides the present invention according to claim 1.
In the present invention described in any one of Items 4 to 4, each of the left and right lens chambers includes a second reccos plate that holds at least one 0D spherical lens or one opening, a rotary prism, and an autocross lens. It is configured as a feature.

The present invention described in claim 6 provides the present invention in claim 5.
In the present invention, the second reccos plate is detachably attached to the left and right lens chambers.

[0016]

An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of the optometry apparatus according to the present embodiment, a part of which is cut away, FIG. 2 is a front view of the entire optometry apparatus, FIG. 3 is a front view of a first turret plate 10, and FIG. It is a figure showing arrangement of an optical element of an optometry device in this embodiment.

As shown in FIG. 2, the optometry apparatus is configured by connecting left and right lens chambers 1 and 2 and an operation panel (not shown) with a cord 3. A viewing window 4 is provided in each of the lens chambers 1 and 2, and a visual table (not shown) arranged at a predetermined distance from the present optometry apparatus is shown to the subject through an optical element arranged in the viewing window 4 so as to be superimposed. , The refractive power of the eye to be examined is measured by selecting an optical element with which the visual table is most visible. Here, the left and right lens chambers 1 and 2 have a symmetrical structure with each other, and in the following embodiment, only one lens chamber 1 (hereinafter simply referred to as “lens chamber 1”) will be described.

As shown in FIG. 1, a first turret plate 10, a second turret plate 20, a third turret plate 20, and A turret plate 30, a first recos plate 40, two rotary cylinder lenses 50 and 51, and a second recos plate 60 are arranged side by side. Among them, the first to third turret plates 10 to 3
A plurality of openings are provided at equal intervals around the periphery of the 0, 1st, and 2nd recos plates 40 and 60, and various optical elements and the like are held in each opening. These first to first
The third turret plates 10 to 30 and the first and second reco's plates 40 and 60 are rotatable about the rotation axis 5, and this rotation allows any optical element among the optical elements held respectively. The element is arranged in the viewing window 4.

Further, two rotary cylinder lenses 50,
Reference numeral 51 denotes a lens having absolute values equal to each other and having different positive and negative frequencies (−3.5D and + 3.5D in the present embodiment). They are freely fixed and constitute a so-called Stokes cross cylinder. These first to third
Turret plates 10 to 30, first and second recourse plates 4
0, 60, and the rotation mechanism of the rotary cylinder lenses 50, 51 and the control thereof are disclosed in
This is the same as that disclosed in US Pat. No. 6,361, and is performed by the examiner operating a motor (not shown) disposed on each side via the operation panel.

Next, the optical elements arranged on each turret plate will be described in detail. The first turret plate 10 mainly holds a spherical lens having a relatively strong lens power, and as shown in FIG.
One is formed. Then, as shown in FIG. 4, the two openings 11 are opened to open the field of view to form an “opening” 12 (even if a 0D spherical lens is inserted in the opening 11, the “opening” 12 is formed. The other six openings hold six spherical lenses 13 at intervals of 8D from “−24D” to “+ 24D”.

The second turret plate 20 mainly holds a spherical lens having a relatively moderate lens power. Eight openings 11 (not shown) are formed on the periphery of the second turret plate 20.
Then, as shown in FIG. 4, one opening is opened to open the field of view to form an “opening”, and the other seven openings have seven openings at 1D intervals from “−4D” to “+ 3D”. Two spherical lenses are held.

The third turret plate 30 mainly holds a spherical lens having a relatively weak lens power, and has eight openings (not shown) formed at the periphery thereof. Then, as shown in FIG. 4, one opening is opened to open the field of view to form an “opening”, and the other seven openings have “−”.
"0.125" from "0.375D" to "+ 0.5D"
Seven spherical lenses spaced at "D" are held.

The first recos board 40 mainly holds an optical element used for assisting the optometry, and has eight openings (not shown) formed on the periphery thereof. Then, as shown in FIG. 4, one opening is opened to open the field of view to form an “opening”, and the other seven openings are “light-shielding plates” for blocking the field of view, and for binocular vision. 45 ° corresponding to the polarization chart
Polarizing plate "and" 1 "corresponding to the binocular polarizing chart.
"35 ° polarizing plate", "Red Maddox lens" used for oblique tests, etc., "Red / green filter" used for depressed vision and double vision inspection, "Pinhole" for finding the standard of corrected vision by the aperture effect, "6U prism lens / 10I prism lens"("U" stands for diopter U
P direction and “I” are diopter IN directions, and the same applies hereinafter).

The second recording plate 60, like the first recording plate 40, mainly holds an optical element used for assisting the optometry, and has three openings (not shown) formed around its periphery. I have. Then, as shown in FIG. 4, one opening is opened to open the field of view to form an “opening”, and the other two openings are opened.
One opening holds a “rotary prism” and an “auto cross lens”, respectively.

Next, the difference between the arrangement of the optical elements in the present optometry apparatus and the arrangement of the optical elements in the conventional optometry apparatus will be described. First, regarding a spherical lens, in a conventional optometry apparatus, as described above, −29D to +26.875.
It was possible to generate a lens power in the range of D. On the other hand, in the present optometry apparatus, as described above, the spherical lenses are arranged on the three holding plates of the first to third turret plates 10 to 30, and from these, -28.375D to +27.
It is possible to generate a lens power in the range of 5D (“−24”).
D ”+“ − 4D ”+“ − 0.375D ”=“ − 28.3 ”
75D "," + 24D "+" + 3D "+" + 0.5D "
= "+ 27.5D").

That is, in the present optometry apparatus, it is possible to generate a lens power of the same degree as the conventional optometry apparatus on the minus side and more than the conventional optometry apparatus on the plus side. On the other hand, in the conventional optometry apparatus, it is necessary to arrange as many as 11 spherical lenses on each turret plate from the arrangement of the lenses, but in the present optometry apparatus, at most the first to third turret plates 10 to 30 are provided. What is necessary is just to arrange seven spherical lenses. Therefore, it is not necessary to arrange spherical lenses for the difference of four, and the turret plates 10 to 30 can be reduced in diameter.

The third turret plate 30 has a thickness of 0.1
Since the spherical lenses are arranged at intervals of 25, fine adjustment of the power and correction of the spherical component with respect to the astigmatic power can be performed by the spherical lenses. Therefore, it is not necessary to provide a 0.125D spherical lens on the first and second recos plates 40 and 60. Therefore, 0.1
Since it is not necessary to arrange the 25D spherical lenses in an overlapping manner, it is possible to reduce the diameter and cost of the first and second recos plates 40 and 60. Also, unlike the past,
10D, + 10D and 0.125D spherical lenses
When the "rotary prism" and the "auto cross lens" are unnecessary, there is no problem even if the second recose plate 60 is omitted. Therefore, the second recos board 60 is basically omitted, for example, by being optionally equipped only when desired by the user, and cost can be reduced. Further, in the present optometry apparatus, since the second reccos plate 60 is detachably attached to the lens chamber by a well-known structure (not shown), the optometry apparatus having the second recos board 60 mounted thereon, An optometry apparatus without the 60 can be easily manufactured simply by attaching and detaching the second rechos plate 60, so that the manufacturing process can be shared and the manufacturing cost can be reduced.

Next, the difference between the optical elements arranged on the first and second recov plates 40 and 60 of the present optometric apparatus and the optical elements arranged on the recco board of the conventional optometric apparatus will be described. The optical elements arranged on the first or second recos board 40, 60 of the present optometry apparatus are as described above, but here, the optical elements arranged on the first or second recos board of the conventional optometry apparatus Among them, those which can be substituted by an optical element of a turret plate and the like are omitted, and the diameter and cost of a recos plate are reduced.

First, as shown in FIG. 4, "opening", "shielding plate", "pinhole", "45 ° polarizing plate", "135 ° polarizing plate", "red madox lens", and "red / green filter" Cannot be substituted with the optical elements or the like of the first to third turret plates 10 to 30, and therefore, are arranged on the first recos board 40 without being omitted in the present optometry apparatus.

As shown in FIG. 4, "6 @ BU / 10
ΔBI ”is also arranged on the first recos board 40. In this case, “6 △ BU / 10 △ BI” can be substituted for the rotary prism of the second reccos plate 60, but in this case, the range of the prism measurement is reduced. In other words, the rotary prism is formed by stacking two 10 ° lenses, and can perform prism measurement in the range of 0 to 20 °. For example, when a 10 ° BI of the auxiliary lens is substituted with a rotary prism, measurement in the BI direction can be performed. Range is 0 to 10 BI
Will be. If the rotary prism is omitted, the auxiliary lens of 6 BU / 10 BI cannot be used. To avoid these, "6 BU / 10"
"BI" are arranged without omission. If a margin is provided in the range of the prism measurement of the rotary prism in advance, “6 △ BU / 10 △ BI” may be omitted.

Next, in a conventional manual optometer, a "lens for a retinoscope" is arranged on the first or second recos board. This "lens for retinoscope"
Is generally a + 1.5D or + 2.0D lens and is used at the time of optometry using a retinoscope. However, in an electric optometry apparatus like this embodiment, the + 1.5D lens is a medium lens and A + 2.0D lens can be easily generated by a weak lens, and a + 2.0D lens can be substituted by a medium lens, and is omitted.

Conventionally, "45 ° polarizing plate + 0.125
D "and" 135 ° polarizing plate + 0.125D "were disposed on the first recos plate. Since a 0.125D spherical lens is required at the time of astigmatic power generation as described above, this is also provided on the second recos plate. However, when another optical element of the second recos plate is used, Since a 0.125D spherical lens cannot be used, a 0.125D spherical lens power is particularly added to a polarizing plate used for final confirmation of the spherical power. However, in the present optometry apparatus, since a 0.125D spherical lens can always be generated by the third turret plate 30 as described above, it is not necessary to add a 0.125D spherical lens power to the polarizing plate. Therefore, in the present optometry apparatus, “45”
° polarizing plate + 0.125D ”and“ 135 ° polarizing plate + 0.
125D "is omitted.

Conventionally, a "white madox lens" in which a "red madox lens" is made transparent is sometimes arranged. There are many optometric devices,
Also omitted in the present optometry apparatus.

Conventionally, a "cross cylinder lens for presbyopia" was sometimes arranged. This "cross cylinder lens for presbyopia" is a ± 0.5D cross cylinder lens for performing presbyopia examination using a near cross optotype. However, the astigmatic power of the “cross cylinder lens for presbyopia” is the same as that of the first and second rotary cylinder lenses 50 and 51.
To the third turret plates 10 to 30 can be generated by spherical lenses. The "cross cylinder lens for presbyopia" is used only during presbyopia measurement, and is not used during astigmatism measurement. Therefore, even if generated by the rotary cylinder lenses 50, 51, etc., there is no danger of narrowing the astigmatism measurement range. . Therefore, in the present optometry apparatus, the “cross cylinder lens for presbyopia” is omitted.

Further, the "cross hair" is also omitted. This "crosshair" is used when measuring the distance between the pupils of the eye to be examined, and by moving the lens chamber so that the crosshair is aligned with the center of the pupil of the eye to be examined, the vertical and horizontal directions of the lens chamber with respect to the eye to be examined Is to adjust the alignment state. The alignment state of the lens chamber in the vertical and horizontal directions with respect to the eye to be examined can be adjusted by the examiner observing the eye to be examined through the viewing window of the lens chamber. That is, the examiner can visually confirm that the subject's eye is located at the approximate center of the field of view, up, down, left, and right.

In the conventional optometry apparatus, as described above, “S + 0.125D”, “S + 10D”, and “S−
10D ". However, these S + 0.125
D "," S + 10D "and" S-10D "
Since it is desired to use together with other optical elements for assisting the optometry arranged on the Recos plates 40 and 60, the first to third turret plates 1
Substitute 0-30 spherical lenses. Therefore, in the present optometry apparatus, these “S + 0.125D”, “S + 1”
The lenses “0D” and “S-10D” are omitted.

As described above, as a result of reducing the number of optical elements arranged on the recos plates 40, 60, the diameter of the recos plates 40, 60 can be reduced. In addition, the diameter of the recourse plates 40 and 60 is
Since the diameters of the turret plates 10 to 30 and the recourse plates 40 and 60 can all be made smaller than those of the related art, the entire lens chamber can be made smaller.

[0038]

As described above, according to the first to third aspects of the present invention, each of the left and right lens chambers has a plurality of turret plates and a first recording device which holds an optical element used for assisting optometry. A plurality of turret plates, each of which has at least one 0D spherical lens or one or more 0D spherical lenses. One turret plate has at least one 0D spherical lens or one opening and 0.125D spacing with one opening and a maximum of eight openings capable of holding a spherical lens. By holding a plurality of spherical lenses, it is possible to reduce the number of lenses arranged on each turret plate while maintaining a measurement range substantially similar to that in the related art, and to reduce the diameter of the turret plate. Therefore, the lens room can be made smaller, the feeling of pressure given to the subject can be reduced, and the examiner can easily observe the state of the subject. Also, the third turret plate has 0.
Since the spherical lenses are arranged at intervals of 125, there is no need to provide a 0.125D spherical lens on the recos plate. Therefore, unlike the conventional case, it is not necessary to arrange the 0.125D spherical lenses in an overlapping manner, so that it is possible to reduce the diameter and cost of the first and second recos plates.

Further, according to the present invention as set forth in claims 4 and 5, the first reccos plate includes one 0D spherical lens or one aperture, a shielding plate for shielding a visual field, a 45 ° polarizing plate, and a 135 ° polarizing plate.
° Polarizer, red Maddox lens, red / green filter,
By holding the pinhole and 6 prism / 10 prism, etc., only the indispensable optical elements which cannot be substituted for the optical elements held by the turret plate etc. are arranged on the recos plate, and the diameter of the recos plate is reduced. can do. Further, the diameter of the recourse plate can be made to correspond to the diameter of the turret plate, and the diameters of the turret plate and the recourse plate can all be made smaller than before so that the entire lens chamber can be downsized.

Further, according to the present invention, the second reticle plate is detachably attached to the left and right lens chambers, so that the optometry apparatus equipped with the second RECOS plate and the second RECOS plate Can be easily manufactured only by attaching and detaching the second recos board, the common manufacturing process can be achieved, and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a lens chamber of an optometry apparatus according to an embodiment of the present invention, with a part thereof cut away.

FIG. 2 is a front view of the entire optometry apparatus.

FIG. 3 is a front view of a first turret plate.

FIG. 4 is a diagram showing an arrangement of optical elements of the optometry apparatus according to the embodiment.

FIG. 5 is a diagram showing an arrangement of optical elements of a conventional optometry apparatus.

[Explanation of symbols]

 E Eye to be inspected 1, 2 Lens room 3 Code 4 Viewing window 5 Rotation axis 6, 7 Frame 10 First turret plate 11 Opening 12 Opening 13 Spherical lens 20 Second turret plate 30 Third turret plate 40 First Reccos plate 50, 51 Rotary cylinder lens 60 Second Reccos plate

Claims (6)

[Claims] 1. A subjective optometric apparatus for measuring a refractive power of an eye to be examined by subjectively measuring a refractive power of a subject's eye by arranging a plurality of optical elements in a visual field window of left and right lens chambers. A plurality of turret plates, a first recos plate for holding an optical element used for assisting the optometry, and two cylinder lenses having the same absolute value and opposite signs and rotatably held on the measurement optical axis. And each of the plurality of turret plates has at least one 0D spherical lens or one opening and up to eight openings capable of holding the spherical lens, and one of the plurality of turret plates is provided. One at least one 0D spherical lens or one aperture, and 0.125D
A subjective optometric apparatus, comprising: holding a plurality of spherical lenses at intervals. 2. One of the plurality of turret plates,
At least one 0D spherical lens or one aperture;
The subjective optometry apparatus according to claim 1, wherein the apparatus holds a plurality of spherical lenses at 1D intervals. 3. The plurality of turret plates includes: at least one 0D spherical lens or one opening;
A first turret plate for holding a plurality of 8D-spaced spherical lenses, at least one 0D spherical lens or one aperture;
A second turret plate for holding a plurality of 1D-spaced spherical lenses, and at least one 0D spherical lens or one aperture;
Third holding a plurality of spherical lenses at 0.125D intervals
3. The subjective optometry apparatus according to claim 1, wherein the turret is a turret plate. 4. The first recos plate includes one 0D spherical lens or one aperture, and a shielding plate for shielding a visual field.
5 ° polarizing plate, 135 ° polarizing plate, red Maddox lens,
4. The subjective optometry apparatus according to claim 1, further comprising a red / green filter, a pinhole, and a 6 prism / 10 prism. 5. Each of the left and right lens chambers includes at least one 0D spherical lens or one aperture;
The subjective optometry apparatus according to any one of claims 1 to 4, further comprising a second recos plate for holding a rotary prism and an auto cross lens. 6. The subjective optometry apparatus according to claim 5, wherein the second reccos plate is detachably attached to the left and right lens chambers.