JPH0197433A - Ophthalmic machine - Google Patents
Ophthalmic machineInfo
- Publication number
- JPH0197433A JPH0197433A JP62254891A JP25489187A JPH0197433A JP H0197433 A JPH0197433 A JP H0197433A JP 62254891 A JP62254891 A JP 62254891A JP 25489187 A JP25489187 A JP 25489187A JP H0197433 A JPH0197433 A JP H0197433A
- Authority
- JP
- Japan
- Prior art keywords
- eye
- examined
- opening
- cornea
- ultrasonic probe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000523 sample Substances 0.000 claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 19
- 238000005259 measurement Methods 0.000 abstract description 17
- 230000004323 axial length Effects 0.000 abstract description 11
- 210000004087 cornea Anatomy 0.000 abstract description 8
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract 1
- 238000005286 illumination Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000012951 Remeasurement Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、複数の測定手段を本体内に有する眼科器械に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an ophthalmological instrument having a plurality of measuring means within its body.
［従来の技術］
従来、被検眼情報を検出する２つの検出手段を持ち、一
方は光学的に非接触で行う角膜曲率測定系、他方は被検
眼に接触して行う眼軸長測定系が既に出願されている。[Prior art] Conventionally, there have been two detection means for detecting eye information, one of which is a corneal curvature measurement system that is performed optically in a non-contact manner, and the other is an axial length measurement system that is performed by contacting the eye to be examined. An application has been filed.
この例では、固定のままの被検眼に対し同一可動部に前
述の２つの測定系が設けられ、可動部を上下に移動して
切換える一方で、眼軸長測定系が測定状態となる場合に
は案内部材に案内されて、眼軸長検知部は被検眼に接触
するように移動可能に構成されている。In this example, the two measurement systems described above are installed on the same movable part for the subject's eye which remains fixed, and while the movable part is moved up and down to switch, the axial length measurement system is in the measurement state. is guided by a guide member, and the axial length detection section is configured to be movable so as to come into contact with the eye to be examined.
［発明が解決しようとする問題点］
しかしながら、上述の先願例では実際の製品化に当って
、必要となるこれらの測定系等を包含する本体カバーに
関して特別に配慮した記載が無く、次のような欠点があ
る。[Problems to be Solved by the Invention] However, in the above-mentioned prior application, there is no description that takes into account any special consideration regarding the main body cover that includes these measurement systems, etc., which will be necessary for actual commercialization, and the following There are some drawbacks.
（、ａ ）光学系に塵埃が付着し易く光学的性能が劣化
し易い。(,a) Dust tends to adhere to the optical system, and optical performance tends to deteriorate.
（ｂ）電気系に手指が接触する虞れがあり、感電予防の
ために通電部の絶縁に多大の手段を構じなければならな
い。(b) There is a risk of fingers coming into contact with the electrical system, and great measures must be taken to insulate current-carrying parts to prevent electric shock.
（ｃ）可動部に接触する虞れがあり、機械に手などを挟
まれることを防止するための十分な配慮が必要である。(c) There is a risk of contact with moving parts, and sufficient consideration must be taken to prevent hands etc. from getting caught in the machine.
（ｄ）内部電気回路が外来の電波ノイズの悪影響を受は
易く、また内部から不要な電波ノイズを外部に放射し易
い。(d) Internal electric circuits are easily affected by external radio noise, and unnecessary radio noise is easily radiated from inside to the outside.
（ｅ）消毒が必要な眼軸長検知部の先端に不用意に手指
が触れて、清潔度を低下する虞れがある。(e) There is a risk that the tip of the axial length detection section, which needs to be disinfected, may be inadvertently touched by fingers, resulting in a decrease in cleanliness.
［発明の目的］
本発明の目的は、上述の欠点を解消し、本体を包含する
被検眼に面した本体カバーに必要な開口部を設け、その
開口部を不要時には実質的に完全に、また所要時にはそ
の面積を必要最少限に制限する開口部制限手段を設けて
測定系を覆うようにした眼科器械を提供することにある
。[Object of the Invention] An object of the present invention is to eliminate the above-mentioned drawbacks, to provide a necessary opening in the main body cover facing the eye to be examined, which includes the main body, and to completely close the opening when unnecessary. It is an object of the present invention to provide an ophthalmological instrument that covers a measurement system by providing an aperture limiting means to limit the area to the necessary minimum when necessary.
［発明の概要］
上述の目的を達成するための本発明の要旨は、摺動台に
支持された本体カバーの被検眼に対向する側に開口部を
設け、該開口部を経て被検眼に離隔して第１の情報検出
を行う第１の検出手段と、前記開口部を通って被検眼に
接触して第２の情報検出を行う第２の検出手段と、前記
第１、第２の検出手段の検出状態を切換える切換手段と
、前記側れかの検出手段の情報検出状態又は検出手段の
切換時に、前記開口部を実質的に必要最少限の開口程度
に制限する開口部制限手段とを有することを特徴とする
眼科器械である。[Summary of the Invention] The gist of the present invention for achieving the above-mentioned object is to provide an opening on the side facing the eye to be examined of a main body cover supported on a sliding table, and to provide remote contact to the eye to be examined through the opening. a first detection means for detecting first information by contacting the subject's eye through the opening, and a second detection means for detecting second information by contacting the eye to be examined through the opening; a switching means for switching the detection state of the means; and an opening limiting means for substantially limiting the opening to the minimum necessary opening when switching the information detection state of the side detection means or the detection means. An ophthalmological instrument characterized by having:
［発明の実施例］ 本発明を図示の実施例に基づいて詳細に説明する。[Embodiments of the invention] The present invention will be explained in detail based on illustrated embodiments.
第１図は第１の実施例を示し、第２図〜第４図はその要
部の作動状態の説明図である。この第１図において、１
は基台であり、この基台ｌ上に摺動台２が載置され、摺
動台２には摺動台２を動かすための操作桿２ａ、上下環
２ｂが取り付けられている。摺動台２上には本体３が構
設され、この本体３の正面の本体カバー４には開口部５
が設けられており、この開口部５の内側には遮光板６が
上下動自在に配置されている。遮光板６には上下方向に
貫通孔６ａとガラス等の透明板６ｂを設けた孔部が設け
られ、貫通孔６ａにはソレノイド７によって駆動するシ
ャッタ８が設けられている。FIG. 1 shows a first embodiment, and FIGS. 2 to 4 are explanatory views of the operating state of its main parts. In this Figure 1, 1
is a base, and a sliding table 2 is placed on this base l, and an operating rod 2a and upper and lower rings 2b for moving the sliding table 2 are attached to the sliding table 2. A main body 3 is constructed on the sliding table 2, and an opening 5 is provided in the main body cover 4 on the front of the main body 3.
A light shielding plate 6 is arranged inside the opening 5 so as to be vertically movable. The light shielding plate 6 is provided with a hole section in which a through hole 6a and a transparent plate 6b made of glass or the like are provided in the vertical direction, and a shutter 8 driven by a solenoid 7 is provided in the through hole 6a.
開口部５の更に内部には対物レンズ９が配置され、この
対物レンズ９の後方に光路に沿ってミラー１０ａ、１０
ｂ、結像レンズ１１．ＣＯＤ等から成る二次元撮像素子
１２が配置され、撮像素子１２の出力はテレビモニタ１
３に接続されている。また、対物レンズ９の周囲には、
発光ダイオード等から成る２個の照明光源１４ａ、１４
ｂが配置されている。なお、対物レンズ９、ミラー１０
ａ、１０ｂ、光源１４ａ、１４ｂは一体構造とされ、遮
光板６と共に上下動するようになっている。更に、ミラ
ー１０ａの背後には超音波プローブ１５が配置され、こ
の超音波プローブ１５はプローブホルダ１６を介して案
内部材１７により前後進自在とされている。なお案内部
材１７の上部には、プローブホルダ１６の前進を検知す
るアクチュエータシュー１８が設けられ、アクチュエー
タ軸１９の先端に圧縮ばね２０を介在して固定されてお
り、アクチュエータ軸１９の動きはスイッチ２１を作動
するようになっている。そして、スイッチ２１の出力は
ソレノイド７に接続されている。なお、２２は基台ｌに
固定された顔受は台である。An objective lens 9 is arranged further inside the opening 5, and mirrors 10a and 10 are arranged behind the objective lens 9 along the optical path.
b. Imaging lens 11. A two-dimensional image sensor 12 consisting of a COD or the like is arranged, and the output of the image sensor 12 is sent to the television monitor 1.
Connected to 3. Also, around the objective lens 9,
Two illumination light sources 14a, 14 consisting of light emitting diodes, etc.
b is placed. In addition, the objective lens 9 and the mirror 10
a, 10b and the light sources 14a, 14b are integrally constructed and are adapted to move up and down together with the light shielding plate 6. Further, an ultrasonic probe 15 is arranged behind the mirror 10a, and the ultrasonic probe 15 is movable back and forth by a guide member 17 via a probe holder 16. An actuator shoe 18 is provided on the upper part of the guide member 17 to detect the advancement of the probe holder 16. The actuator shoe 18 is fixed to the tip of the actuator shaft 19 with a compression spring 20 interposed therebetween, and the movement of the actuator shaft 19 is controlled by a switch 21. It is designed to operate. The output of the switch 21 is connected to the solenoid 7. Note that 22 is a face support fixed to the base l.
ここで、照明光源１４ａ、１４ｂは被検眼Ｅを照明し、
被検眼Ｅの像を上昇している遮光板６の透明板６ｂを介
して、前述の対物レンズ９〜撮像素子１２の光学的結像
撮影手段により検出し、モニタ１３上に表示する。被検
眼Ｅの角膜による照明光源１４ａ、１４ｂの反射像間隔
を撮像素子１２の出力信号から検知・演算することによ
り、角膜の曲率半径が算出できる。なお、照明光源１４
ａ、１４ｂはその数を更に増加して配置すれば、角膜の
他の径線方向の曲率半径も知ることができる。この場合
に、透明板６ｂは上述のような光学的検出手段にとって
は機能的障害は無いが、塵埃や手指等の本体３内への進
入を防止し得る役割を果している。Here, the illumination light sources 14a and 14b illuminate the eye E to be examined,
An image of the eye E to be examined is detected through the transparent plate 6b of the rising light shielding plate 6 by the optical imaging means of the objective lens 9 to the image pickup device 12, and displayed on the monitor 13. The radius of curvature of the cornea can be calculated by detecting and calculating the interval between reflected images of the illumination light sources 14a and 14b on the cornea of the eye E from the output signal of the image sensor 12. Note that the illumination light source 14
If the numbers a and 14b are further increased, the radii of curvature of the cornea in other radial directions can also be determined. In this case, the transparent plate 6b does not functionally impede the optical detection means as described above, but it plays a role in preventing dust, fingers, etc. from entering into the main body 3.
超音波プローブ１５はその左端のプローブ先端１５ａを
被検眼Ｅの角膜に接触し、超音波発生パルスの印加及び
被検眼Ｅ内の反射信号の検出を公知のパルサレシーバや
演算手段で行うことにより、眼軸長を測定することがで
きる。The ultrasonic probe 15 brings its left end probe tip 15a into contact with the cornea of the eye E to be examined, and applies the ultrasonic generation pulse and detects the reflected signal in the eye E to be examined using a known pulser receiver or calculation means. The axial length can be measured.
次に、角膜曲率測定から眼軸長測定に切換える作動状態
を第２図〜第４図により説明すると、先ず第２図に示す
ように対物レンズ９、ミラー１０ａ、１０ｂ、光源１４
ａ、１４ｂから成る角膜曲率測定系が被検眼Ｅの対向位
置から図示しない駆動手段によって下方に移動するが、
これに連動して遮光板６も下方に移動する。このときの
遮光板６の被検眼Ｅの対向位置には、超音波プローブ１
５の外径よりも稍々大きな径の開口である貫通孔６ａが
存在する。また貫通孔６ａの内側には、写真レンズ等に
用いられる完全閉口ができる虹彩絞り等によるシャッタ
８が設けられており、このシャッタ８はソレノイド７に
より超音波プローブ１５の外径よりも稍々大きな径に開
口し得るようになっている。Next, the operating state for switching from corneal curvature measurement to axial length measurement will be explained with reference to FIGS. 2 to 4. First, as shown in FIG.
The corneal curvature measurement system consisting of a and 14b is moved downward from a position facing the eye E to be examined by a driving means (not shown).
In conjunction with this, the light shielding plate 6 also moves downward. At this time, an ultrasound probe 1 is placed on the light shielding plate 6 at a position facing the eye E to be examined.
There is a through hole 6a which is an opening having a slightly larger diameter than the outer diameter of the hole 5. Further, inside the through hole 6a, there is provided a shutter 8 such as an iris diaphragm that can be completely closed as used in photographic lenses. It is designed so that it can be opened to the diameter.
角膜曲率測定系がこのように下方に所定量以上移動した
とき、プローブホルダ１６は図示しない駆動手段により
案内部材１７によって案内され、超音波プローブ１５は
左方へ駆動される。この駆動が開始され、第３図に示す
ようにプローブ１５の先端１５ａがシャッタ８の近くま
でくると、プローブホルダ１６が圧縮ばね２０により下
方に規制されているアクチュエータシュー１８を押して
、このシュー１８に連結するアクチュエータ軸１９がス
イッチ２１を作動させると、この信号によりソレノイド
７がシャッタ８を開口する。そして、更にプローブホル
ダ１６が左方へ駆動すると超音波プローブ１５はシャッ
タ８の開口部５を通過して進行し、第４図に示すように
その先端１５ａが被検眼Ｅの角膜に接触して眼軸長測定
が可能となる。また、眼軸長測定から角膜曲率測定に切
換える場合には、上述の作動が逆行することになる。When the corneal curvature measurement system moves downward by a predetermined amount or more, the probe holder 16 is guided by the guide member 17 by a driving means (not shown), and the ultrasound probe 15 is driven to the left. When this drive is started and the tip 15a of the probe 15 comes close to the shutter 8 as shown in FIG. When the actuator shaft 19 connected to the actuator actuates the switch 21, the solenoid 7 opens the shutter 8 in response to this signal. Then, when the probe holder 16 is further driven to the left, the ultrasound probe 15 passes through the opening 5 of the shutter 8 and advances, and its tip 15a comes into contact with the cornea of the eye E as shown in FIG. It becomes possible to measure the axial length of the eye. Moreover, when switching from axial length measurement to corneal curvature measurement, the above-mentioned operation is reversed.
第５図は第２の実施例を示し、第１の実施例では共通に
使用する開口部５を本体カバー４に設けていたが、この
第２の実施例においては開口部として本体カバー４に角
膜曲率測定時に利用する透明板３０を設けた孔部と眼軸
長測定時に利用する貫通孔３１．とが別個に設けられて
おり、貫通孔３１の内側にはシャッタ８が直接設けられ
ている。FIG. 5 shows a second embodiment. In the first embodiment, a commonly used opening 5 was provided in the main body cover 4, but in this second embodiment, the opening 5 is provided in the main body cover 4 as an opening. A hole provided with a transparent plate 30 used for measuring corneal curvature and a through hole 31 used for measuring axial length. A shutter 8 is provided directly inside the through hole 31.
第１の実施例では、眼軸長測定時には角膜曲率測定系を
下方に移動するようにしたが、この第２の実施例では再
測定系の配置高さ寸法りだけアジャスタ部３２が伸縮す
るようになっている。この場合に、角膜曲率測定系には
光路折曲用のミラー１０ａ、１０ｂが不要であり、また
超音波プローブ１５の移動も少なくてよいので、案内部
材１７、アクチュエータシュー１８は第２の実施例より
も短かくて済む。In the first embodiment, the corneal curvature measurement system was moved downward when measuring the ocular axial length, but in this second embodiment, the adjuster section 32 is expanded and contracted by the height dimension of the remeasurement system. It has become. In this case, the corneal curvature measurement system does not require the mirrors 10a and 10b for bending the optical path, and the movement of the ultrasonic probe 15 can be reduced, so the guide member 17 and actuator shoe 18 are replaced by the second embodiment. It can be shorter than
［発明の効果］
以上説明したように本発明に係る眼科器械は、本体カバ
ーの開口部を光学的利用時には透明体で遮閉し、また超
音波による測定時には必要最少寸法の開口とすることに
より、次のような効果が生ずる。[Effects of the Invention] As explained above, the ophthalmological instrument according to the present invention has the effect of blocking the opening of the main body cover with a transparent material during optical use, and by making the opening of the minimum necessary size during ultrasonic measurement. , the following effects occur.
（１）内部に塵埃や物体が入ることを防止でき、光学的
性能の低下や電気回路の短絡等の危険を防止できる。(1) Dust and objects can be prevented from entering the interior, and dangers such as deterioration of optical performance and short-circuiting of electric circuits can be prevented.
（２）手指が挟まれたり感電の危険性が軽減される。(2) The risk of fingers being pinched or electric shock is reduced.
（３）超音波式の検出端が所要時以外は本体内部に収納
されていて清潔度が保持される。(3) The ultrasonic detection end is housed inside the main body except when needed, so cleanliness is maintained.
図面は本発明に係る眼科器械の実施例を示し、第１図は
第１の実施例の構成図、第２図〜第４図はその作動説明
図、第５図は第２の実施例の構成図である。
符号１は基台、２は摺動台、３は本体、４は本体カバー
、５は開口部、６は遮光板、６ａ、３１は貫通孔、６ｂ
、３０は透明板、７はソレノイド、８はシャッタ、９は
対物レンズ、１１は結像レンズ、１２は二次元撮像素子
、１３はテレビモニタ、１４ａ、１４ｂは照明光源、１
５は超音波プローブ、１６はプローブホルダ、１７は案
内部材、２１はスイッチ、３２はアジャスタ部である。
特許出願人 キャノン株式会社The drawings show embodiments of the ophthalmological instrument according to the present invention, FIG. 1 is a configuration diagram of the first embodiment, FIGS. 2 to 4 are illustrations of its operation, and FIG. 5 is a diagram of the second embodiment. FIG. 1 is a base, 2 is a sliding table, 3 is a main body, 4 is a main body cover, 5 is an opening, 6 is a light shielding plate, 6a, 31 are through holes, 6b
, 30 is a transparent plate, 7 is a solenoid, 8 is a shutter, 9 is an objective lens, 11 is an imaging lens, 12 is a two-dimensional image sensor, 13 is a television monitor, 14a and 14b are illumination light sources, 1
5 is an ultrasonic probe, 16 is a probe holder, 17 is a guide member, 21 is a switch, and 32 is an adjuster section. Patent applicant Canon Co., Ltd.
Claims (1)
側に開口部を設け、該開口部を経て被検眼に離隔して第
１の情報検出を行う第１の検出手段と、前記開口部を通
って被検眼に接触して第２の情報検出を行う第２の検出
手段と、前記第１、第２の検出手段の検出状態を切換え
る切換手段と、前記何れかの検出手段の情報検出状態又
は検出手段の切換時に、前記開口部を実質的に必要最少
限の開口程度に制限する開口部制限手段とを有すること
を特徴とする眼科器械。 ２、前記開口部を通る前記第２の検出手段は、被検眼に
接触して被検眼情報の検出を行う超音波プローブ及びそ
の支持体を有し、前記第１の検出手段は前記開口部を光
学的に利用して被検眼情報の検出を行う特許請求の範囲
第１項に記載の眼科器械。 ３、前記第１、第２の検出手段は開口部を共用するよう
にした特許請求の範囲第１項に記載の眼科器械。[Scope of Claims] 1. An opening is provided on the side of the main body cover supported on a sliding table facing the eye to be examined, and a first information detection device is provided at a distance from the eye to be examined through the opening. a second detection means for detecting second information by contacting the eye to be examined through the opening; a switching means for switching the detection state of the first and second detection means; An ophthalmological instrument characterized by comprising: an aperture limiting means for substantially limiting the aperture to the minimum necessary aperture when the information detection state of any of the detecting means is changed or when the detecting means is switched. 2. The second detection means that passes through the opening includes an ultrasonic probe and its support that contacts the eye to be examined and detects eye information, and the first detection means passes through the opening. The ophthalmological instrument according to claim 1, which detects eye information using optical means. 3. The ophthalmological instrument according to claim 1, wherein the first and second detection means share an opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62254891A JPH0197433A (en) | 1987-10-09 | 1987-10-09 | Ophthalmic machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62254891A JPH0197433A (en) | 1987-10-09 | 1987-10-09 | Ophthalmic machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0197433A true JPH0197433A (en) | 1989-04-14 |
Family
ID=17271277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62254891A Pending JPH0197433A (en) | 1987-10-09 | 1987-10-09 | Ophthalmic machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0197433A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5191953A (en) * | 1990-08-15 | 1993-03-09 | Aisin Aw Co., Ltd. | Electronically controlled automatic transmission |
| JP2007144128A (en) * | 2005-11-01 | 2007-06-14 | Nidek Co Ltd | Ophthalmic apparatus |
| JP2007289662A (en) * | 2006-03-31 | 2007-11-08 | Nidek Co Ltd | Ophthalmologic apparatus |
| JP2007289663A (en) * | 2006-03-31 | 2007-11-08 | Nidek Co Ltd | Ophthalmologic apparatus |
| JP2008099968A (en) * | 2006-10-20 | 2008-05-01 | Nidek Co Ltd | Ophthalmic apparatus |
| JP2008161218A (en) * | 2006-12-26 | 2008-07-17 | Nidek Co Ltd | Eye axial length measurement apparatus |
| JP2008272259A (en) * | 2007-04-27 | 2008-11-13 | Nidek Co Ltd | Ophthalmic equipment |
| JP2020058582A (en) * | 2018-10-10 | 2020-04-16 | 株式会社トーメーコーポレーション | Ophthalmic equipment |
-
1987
- 1987-10-09 JP JP62254891A patent/JPH0197433A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5191953A (en) * | 1990-08-15 | 1993-03-09 | Aisin Aw Co., Ltd. | Electronically controlled automatic transmission |
| JP2007144128A (en) * | 2005-11-01 | 2007-06-14 | Nidek Co Ltd | Ophthalmic apparatus |
| KR101307606B1 (en) * | 2005-11-01 | 2013-09-12 | 가부시키가이샤 니데크 | Ophthalmology apparatus |
| JP2007289662A (en) * | 2006-03-31 | 2007-11-08 | Nidek Co Ltd | Ophthalmologic apparatus |
| JP2007289663A (en) * | 2006-03-31 | 2007-11-08 | Nidek Co Ltd | Ophthalmologic apparatus |
| JP2008099968A (en) * | 2006-10-20 | 2008-05-01 | Nidek Co Ltd | Ophthalmic apparatus |
| JP2008161218A (en) * | 2006-12-26 | 2008-07-17 | Nidek Co Ltd | Eye axial length measurement apparatus |
| JP2008272259A (en) * | 2007-04-27 | 2008-11-13 | Nidek Co Ltd | Ophthalmic equipment |
| JP2020058582A (en) * | 2018-10-10 | 2020-04-16 | 株式会社トーメーコーポレーション | Ophthalmic equipment |
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