JPH0349447B2 - - Google Patents
Info
- Publication number
- JPH0349447B2 JPH0349447B2 JP62039335A JP3933587A JPH0349447B2 JP H0349447 B2 JPH0349447 B2 JP H0349447B2 JP 62039335 A JP62039335 A JP 62039335A JP 3933587 A JP3933587 A JP 3933587A JP H0349447 B2 JPH0349447 B2 JP H0349447B2
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- casing
- mechanical
- tonometer
- light
- 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.)
- Expired - Lifetime
Links
- 210000004087 cornea Anatomy 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000003993 interaction Effects 0.000 claims description 2
- 230000004410 intraocular pressure Effects 0.000 description 22
- 238000009530 blood pressure measurement Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 208000010412 Glaucoma Diseases 0.000 description 2
- 241000668842 Lepidosaphes gloverii Species 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000030533 eye disease Diseases 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/16—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring intraocular pressure, e.g. tonometers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Eye Examination Apparatus (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は医療装置に関し、より詳しくは機械的
眼圧計に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to medical devices, and more particularly to mechanical tonometers.
本発明は外来患者又は臨床患者の眼内の圧力の
測定又は診断をする眼科医術に使用される。 The present invention is used in ophthalmology to measure or diagnose intraocular pressure in outpatient or clinical patients.
従来から機械的眼圧計は公知である。この種の
眼圧計においては眼内の圧力値は適用円の寸法に
よつて判断される。即ちその直径即ち力の大きさ
は適用円の寸法に相当する。〔A.P.Nesterov等
「Intraocular pressure（physiology and
pathology）」Nauka publishers、Moscow、
1974年16〜17頁ソビエト国〕参照のこと、しかし
このような機械的眼圧計は測定精度が低く或は構
造が複雑である。さらにこれらの機械的眼圧計で
は眼の脈動振動を測定することができない。
Mechanical tonometers are known from the prior art. In this type of tonometer, the intraocular pressure value is determined by the size of the applicable circle. That is, its diameter, ie, the magnitude of the force, corresponds to the size of the applicable circle. [AP Nesterov et al. “Intraocular pressure (physiology and
pathology)” Nauka publishers, Moscow,
See Soviet Union, 1974, pp. 16-17]; however, such mechanical tonometers have low measurement accuracy or are complex in construction. Furthermore, these mechanical tonometers cannot measure the pulsating vibrations of the eye.
別の公知の機械的眼圧計（A.P.Nesterov等、
op.cit.16〜18頁）は検査すべき眼の表面に密接す
るようにされた脚部を有するケーシングと、脚部
の反対側においてケーシングに設けられた目盛り
と、ケーシング内に可動状に設けられて眼内の圧
力測定中に脚部を通してプランジヤの下部と検査
すべき眼の角膜とが相互作用するように形成され
たプランジヤとを備えている。プランジヤの他端
即ち上部は曲線状の連鎖を介して、脚部と反対側
のケーシング内に設けた目盛りに沿つて可動の針
と協同している。 Another known mechanical tonometer (AP Nesterov et al.
op.cit., pp. 16-18) comprises a casing with a leg adapted to be in close contact with the surface of the eye to be examined, a scale provided on the casing on the opposite side of the leg, and a movable scale within the casing. A plunger is provided and configured such that the lower part of the plunger interacts with the cornea of the eye to be examined through the leg during intraocular pressure measurement. The other end or top of the plunger cooperates via a curved chain with a needle movable along a scale provided in the casing opposite the leg.
しかしプランジヤの移動を針のかたよりに変換
するには機械的眼圧計要素内の大きな摩擦力に打
勝たねばならない。又この機械的眼圧計の拡大率
は極めて低い。何故ならば拡大率を大きくすると
曲線状連鎖の伝動比の増大が避けられない。その
結果プランジヤに作用する測定用の機械的連鎖の
重量を極端に増大せねばならない。従つて機械的
眼圧計のかなりの摩擦損失と不適当な変換のため
に眼の脈動振動の測定が不可能になる。
However, large frictional forces within the mechanical tonometer element must be overcome in order to convert plunger movement into needle deflection. Also, the magnification rate of this mechanical tonometer is extremely low. This is because when the expansion ratio is increased, the transmission ratio of the curved chain inevitably increases. As a result, the weight of the measuring mechanical chain acting on the plunger must be increased considerably. The considerable frictional losses and inadequate conversion of mechanical tonometers therefore make it impossible to measure the pulsating vibrations of the eye.
本発明の目的は眼内の圧力測定結果の読み出し
に光点を使用することによつて眼圧計要素内の摩
擦状態を軽減した機械的眼圧計を提供することで
ある。 It is an object of the present invention to provide a mechanical tonometer that reduces frictional conditions within the tonometer element by using a light spot to read out intraocular pressure measurements.
上記の目的を達成する本発明の機械的眼圧計
は、検査すべき眼に密接するように形成された脚
部を有するケーシングと、上記脚部と反対側のケ
ーシング内側に配設した目盛りと、ケーシング内
に可動状に設けられて上記脚部を通してプランジ
ヤの下部と検査すべき眼の角膜とを相互作用させ
るように形成されたプランジヤとを備えた機械的
眼圧計において、ケーシング内には光源と、上記
プランジヤと協同する反射鏡とが収容され、上記
プランジヤの内芯は導光性材料で作られると共に
上記光源から出た光の一部が通過するように形成
され、他方上記反射鏡によつて反射した光の部分
が上記目盛りの方向に向けられたことを特徴とす
る機械的眼圧計である。
The mechanical tonometer of the present invention that achieves the above object includes: a casing having a leg portion formed to be in close contact with the eye to be examined; a scale disposed inside the casing on the opposite side of the leg portion; A mechanical tonometer comprising a plunger movably disposed within the casing and configured to allow interaction between the lower part of the plunger and the cornea of the eye to be examined through the legs, wherein a light source and a light source are disposed within the casing. , a reflective mirror cooperating with the plunger is housed, the inner core of the plunger being made of a light-guiding material and configured to allow a portion of the light emitted from the light source to pass therethrough; The mechanical tonometer is characterized in that a portion of the light reflected by the tonometer is directed in the direction of the scale.
反射鏡がケーシング内に配設した支持部を有す
る軸に対して回動自在に設けられることが好まし
い。 Preferably, the reflecting mirror is rotatably provided about a shaft having a support disposed within the casing.
プランジヤが、眼の検査中に該プランジヤと共
に移動可能でありかつ反射鏡と相互作用をして反
射鏡を軸の周りに回動させる針を備えると好都合
である。 Advantageously, the plunger is provided with a needle which is movable together with the plunger during an eye examination and which interacts with the reflector to rotate it around an axis.
反射鏡軸の支持部がケーシング内に可動状に設
けられることが望ましい。 Preferably, the support for the reflector shaft is movably provided within the casing.
機械的眼圧計を上記のように構成したので構造
をかなり簡素化することができ、機械的眼圧計の
可動要素内の摩擦を減少させ、眼内の圧力測定の
精度を向上させると共に患者の凝視を固定させる
ことができる。 The construction of the mechanical tonometer as described above allows for a considerable simplification of construction, reduces friction within the moving elements of the mechanical tonometer, improves the accuracy of intraocular pressure measurement, and improves the patient's gaze. can be fixed.
以下、添付図面を参照した本発明の実施例につ
いて本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail with reference to embodiments of the present invention with reference to the accompanying drawings.
本発明の機械的眼圧計は脚部２を有するケーシ
ング１（第１図・第２図）を備える。ケーシング
１は上部１′及び下部１″を有する。脚部２は検査
すべき眼の角膜表面に密接し易くかつ眼内圧力測
定中に機械的眼圧力計の姿勢が安定するように形
成されている。ケーシング１には脚部２と反対側
に目盛り３が設けられている。該目盛り３はシイ
ツツ（Schitz）単位と呼ばれる公知の単位で眼内
の圧力読取り用として50μｍピツチで刻まれてい
る。ケーシング１の下部１″に収容された軸受５，
６内にプランジヤ４が可動状に設けられる。プラ
ンジヤ４下端は眼内圧力測定中に角膜表面に相互
に作用するように形成されている。ケーシング１
の上部１′内に光源が設けられている。この光源
は所定の位置に固定した電球７とその焦点距離に
等しい距離だけ電球から離してケーシング１内に
可動状に設けられた光学レンズ８とを備える。ま
たケーシング１には、プランジヤ４の運動を目盛
り３上の光点の走行に変換するためにプランジヤ
と協同した反射鏡９が収容されている。プランジ
ヤ４の内芯１０はガラス等の導光性材料で作られ
ている。プランジヤ４の内芯１０の導光性材料は
検査する眼の角膜表面に直接に接触する。プラン
ジヤ４は該プランジヤ４の上部１′に錠止された
針１１（第３図）を介して反射鏡９と相互作用を
する。反射鏡９がプランジヤ４に対してこのよう
に配列されているので、電球７（第１図）からの
光線部分は光学レンズ８と反射鏡９の光反射層１
３の一部を除去して針１１の付近に形成された開
口１２とを通してプランジヤ４の導光性材料の内
芯１０に入射する。反射鏡９は軸１４上に設けら
れ、該軸１４の支持部１５（第１図）はケーシン
グ１内に可動状に設けられると共に針１１を有す
るプランジヤ４の上部がケーシング１から延びた
場所に配設されている。プランジヤ４はピン１６
によつてその下方に向けての移動が拘束されてい
る。作動位置において機械的眼圧計はハンドル１
７によつて患者の眼の上に保持される。このハン
ドル１７内には電球７用電源が収容されている。
The mechanical tonometer of the present invention comprises a casing 1 (FIGS. 1 and 2) having legs 2. The casing 1 has an upper part 1' and a lower part 1''.The leg part 2 is formed so that it can easily come into close contact with the corneal surface of the eye to be examined and the posture of the mechanical ocular pressure meter is stabilized during intraocular pressure measurement. The casing 1 is provided with a scale 3 on the opposite side of the leg 2.The scale 3 is a well-known unit called a Schitz unit and is carved at a pitch of 50 μm for intraocular pressure reading. .A bearing 5 housed in the lower part 1″ of the casing 1,
A plunger 4 is movably provided within the plunger 6 . The lower end of the plunger 4 is configured to interact with the corneal surface during intraocular pressure measurements. Casing 1
A light source is provided in the upper part 1' of the device. The light source comprises a light bulb 7 fixed in position and an optical lens 8 movably mounted in the casing 1 at a distance from the light bulb equal to its focal length. The housing 1 also accommodates a reflector 9 which cooperates with the plunger in order to convert the movement of the plunger 4 into a movement of a light spot on the scale 3. The inner core 10 of the plunger 4 is made of a light guiding material such as glass. The light-guiding material of the inner core 10 of the plunger 4 directly contacts the corneal surface of the eye to be examined. The plunger 4 interacts with the reflector 9 via a needle 11 (FIG. 3) which is locked in the upper part 1' of the plunger 4. Since the reflector 9 is arranged in this way with respect to the plunger 4, the light beam from the light bulb 7 (FIG. 1) is transmitted through the optical lens 8 and the light reflecting layer 1 of the reflector 9.
3 is removed and enters the inner core 10 of the light-guiding material of the plunger 4 through an opening 12 formed near the needle 11. The reflector 9 is mounted on a shaft 14 whose support 15 (FIG. 1) is movably mounted in the casing 1 and at the location where the upper part of the plunger 4 with the needle 11 extends from the casing 1. It is arranged. Plunger 4 is pin 16
Its downward movement is restricted by. In the working position the mechanical tonometer has handle 1
7 on the patient's eye. A power source for the light bulb 7 is housed within the handle 17.
グロメツト２０を通してハンドル１７に延びた
電線１８，１９によつて電球７に電力を供給す
る。電線１８，１９はハンドル１７内部のブラケ
ツト２５に固着した夫々の端子２３，２４のリー
ドアウト２１，２２に夫々接続されている。 Electrical power is supplied to the bulb 7 by electrical wires 18, 19 extending through the grommet 20 to the handle 17. Wires 18 and 19 are connected to leadouts 21 and 22 of respective terminals 23 and 24 secured to a bracket 25 inside handle 17, respectively.
光源７，８と該光源７，８からの光を目盛り３
に向ける反射鏡９とが機械的眼圧計内に設けられ
ているので該機械的眼圧計の構造が簡素になる。
その理由は機械的眼圧計のすべての可動要素（特
に従来の眼圧計の曲線状連鎖）を本発明ではプラ
ンジヤ４の作用を受けて軸１４の周りを回動する
反射鏡９に置替えた為である。プランジヤ４の運
動を目盛３上の光点指標２６（第３図）の移動に
変換したので眼圧計要素内における摩擦を減少さ
せることができる。眼圧計の拡大率は長い目盛り
３によつて増大される。 The light sources 7 and 8 and the light from the light sources 7 and 8 are displayed on the scale 3.
The mechanical tonometer has a simple structure because the reflector 9 is provided in the mechanical tonometer.
This is because all the movable elements of the mechanical tonometer (especially the curved chain of the conventional tonometer) are replaced in the present invention by a reflector 9 that rotates around an axis 14 under the action of the plunger 4. It is. By converting the movement of the plunger 4 into a movement of the light spot indicator 26 (FIG. 3) on the scale 3, friction within the tonometer element can be reduced. The magnification of the tonometer is increased by the long scale 3.
機械的眼圧計の構成要素内の摩擦が減少しかつ
高度の拡大率が得られるので眼内圧力が測定でき
るだけでなく眼の脈動振動の振幅を測定すること
ができる。これは光源から出た光がプランジヤ４
の内芯１０内に向けられ、患者の凝視を固定する
ことができる為である。 The reduced friction within the mechanical tonometer components and the high degree of magnification allow not only intraocular pressure to be measured, but also the amplitude of the ocular pulsating vibrations. This means that the light emitted from the light source is sent to the plunger 4.
This is because the patient's gaze can be fixed within the inner core 10 of the patient.
以下に本発明の機械的眼圧計の作用を説明す
る。
The operation of the mechanical tonometer of the present invention will be explained below.
脚部２を有するケーシング１を検査すべき患者
の眼の角膜２７表面上に密接状に置き、検査中は
ハンドル１７によつて保持する。プランジヤ４が
ケーシング１に対して移動中、その重力によつて
角膜２７が変形する。眼内圧力測定中にプランジ
ヤ４と共に該プランジヤの針１１が移動し、反射
鏡９と相互作用をして該反射鏡を軸１４（第３
図）の周りに角度αに亘つて回動させる。電球７
（第１図）から出た光は光学レンズ８を通つて反
射鏡９で反射されて目盛り３上に光点指標２６′
（第２図）を形成する。光点指標２６′の位置は反
射鏡９が回動した角度α（第３図）の大きさに比
例している。目盛り３（第２図）における光点指
標２６′の座標の変化（Δx）はプランジヤ４（第
１図）の位置の変化（Δy）に関係し、次式で表
わされる。 The casing 1 with legs 2 is placed closely on the surface of the cornea 27 of the eye of the patient to be examined and is held by the handle 17 during the examination. While the plunger 4 is moving relative to the casing 1, the cornea 27 is deformed by its gravity. During intraocular pressure measurement, the needle 11 of the plunger moves together with the plunger 4, interacts with the reflector 9, and moves the reflector along the axis 14 (third
(Fig.) through an angle α. light bulb 7
(Fig. 1) passes through an optical lens 8, is reflected by a reflecting mirror 9, and appears on the scale 3 at a light point index 26'.
(Fig. 2) is formed. The position of the light spot indicator 26' is proportional to the angle α (FIG. 3) through which the reflecting mirror 9 is rotated. The change (Δx) in the coordinates of the light point index 26' on the scale 3 (FIG. 2) is related to the change (Δy) in the position of the plunger 4 (FIG. 1), and is expressed by the following equation.
Δx＝ΔyＨ／ｈ＋Δy2／ｈ
式中、Ｈは反射鏡９の表面から目盛り３の表面
までの距離、ｈは反射鏡９と交差した針１１の中
心から軸１４の中心までの距離（第３図）であ
る。Δy2は微小値なのでこれを無視すると、
Δx＝Ｈ／ｈΔy＝kΔy
従つて変換率ｋはＨ／ｈに比例し、感度の増加は
プランジヤ４の重量変化には全然無関係である。
針１１が反射鏡９に接触する場所における摩擦の
影響は殆んど無視できる。装置の高度の拡大率に
加えて眼の脈動振動の振幅を測定することができ
る。目盛り３は通常の単位で刻まれている。目盛
り３は公知の適宜手法によつて、特殊な表を用い
て水銀をミリメータで表わした眼内圧力に変換す
ることができる。従つてプランジヤ４の位置（第
１図）は正しく眼内圧力値に相当する。反射鏡９
に入射した光の一部は開口１２（第３図）を通過
してプランジヤ４の内芯１０（第１図）に入りそ
こから検査中の患者の目に入り、角膜２７に対し
て眼圧計が正しい位置に設けられているならば眼
の中に正しい光像を形成する。患者の凝視を光像
に固定するために患者は光像上に連続的に眼を向
けることを要求される。ハンドル１７を用いて患
者の眼の作用位置に眼圧計を保持する。 Δx=ΔyH/h+Δy 2 /h In the formula, H is the distance from the surface of the reflector 9 to the surface of the scale 3, and h is the distance from the center of the needle 11 crossing the reflector 9 to the center of the axis 14 (the third Figure). Since Δy 2 is a minute value, if it is ignored, Δx=H/hΔy=kΔy Therefore, the conversion rate k is proportional to H/h, and the increase in sensitivity is completely unrelated to the change in the weight of the plunger 4.
The effect of friction at the location where the needle 11 contacts the reflector 9 is almost negligible. In addition to the high magnification of the device, the amplitude of the ocular pulsating vibrations can be measured. Scale 3 is engraved in normal units. The scale 3 can be converted into intraocular pressure expressed in millimeters of mercury using a special table by any suitable known method. The position of the plunger 4 (FIG. 1) therefore corresponds correctly to the intraocular pressure value. Reflector 9
A portion of the incident light passes through the aperture 12 (FIG. 3), enters the inner core 10 (FIG. 1) of the plunger 4, and from there enters the eye of the patient under examination and is directed against the cornea 27 by the tonometer. If placed in the correct position, it will form the correct light image in the eye. In order to fix the patient's gaze on the light image, the patient is required to continuously direct their eyes onto the light image. The handle 17 is used to hold the tonometer in a working position on the patient's eye.
本発明の眼圧計は実際の眼内圧力を測定する。
本発明の機械的眼圧計によつて緑内障を患らつて
いる人、緑内障の疑いのある人、手術後の患者及
び子供について25人の患者（35個の眼）の眼圧検
査を行なつた。患者の年令は７才から78才であ
り、測定した眼内圧力値は５から50mmHgの範囲
であつた。患者のすべては行なつた検査について
我慢できると述べている。 The tonometer of the present invention measures actual intraocular pressure.
Intraocular pressure tests were performed on 25 patients (35 eyes) using the mechanical tonometer of the present invention, including people suffering from glaucoma, people suspected of having glaucoma, patients after surgery, and children. . The patients' ages ranged from 7 to 78 years, and the intraocular pressure values measured ranged from 5 to 50 mmHg. All of the patients stated that the tests performed were tolerable.
第４図は検査結果をグラフ状に表わしたもの
で、図中直線２８は測定した眼内圧力ｐの実際値
を示す。これに対して垂直線２９は二つの測定３
０及び３１間の誤差値を示し、前者３０は本発明
の眼圧計により、また後者３１は従前公知の眼圧
計で測定した眼内圧力値である。これから判るよ
うに本発明の機械的眼圧計を用いて測定した値は
実際の眼内圧力値によく一致していることが判
る。 FIG. 4 shows the test results in a graph, and the straight line 28 in the figure shows the actual value of the measured intraocular pressure p. On the other hand, the vertical line 29 shows the two measurements 3
Error values between 0 and 31 are shown, the former 30 being the intraocular pressure value measured by the tonometer of the present invention, and the latter 31 being the intraocular pressure value measured by a conventionally known tonometer. As can be seen, the values measured using the mechanical tonometer of the present invention are in good agreement with the actual intraocular pressure values.
従来から使用されている機械的眼圧計に比較す
ると本発明の機械的眼圧計は生物学的汚染を伴な
つた取扱いがないので所要検査時間をかなり短縮
させ、技術的に簡単で経済的であり、また使用上
の矛盾を生じない。このような理由で本発明の機
械的眼圧計は子供を含んだあらゆる年令層の患者
の眼内圧力測定に用いることができる。また装置
を操作する側の人は取扱うための特別な訓練を必
要としない。 Compared to conventionally used mechanical tonometers, the mechanical tonometer of the present invention is not handled with biological contamination, considerably shortens the required examination time, and is technically simple and economical. , and there is no conflict in usage. For this reason, the mechanical tonometer of the present invention can be used to measure intraocular pressure in patients of all age groups, including children. Also, the person operating the device does not need special training to handle it.
本発明の機械的眼圧計は長期に亘つて使用する
ことができ、目盛りの長いことに起因して測定が
正確であり、また患者の凝視を固定することがで
き、さらに眼の脈動振動を測定することができ
る。このため種々の眼の病気をより効果的に診断
することができる。
The mechanical tonometer of the present invention can be used for a long time, the measurement is accurate due to the long scale, the patient's gaze can be fixed, and the pulsating vibration of the eye can be measured. can do. Therefore, various eye diseases can be diagnosed more effectively.
第１図は本発明の機械的眼圧計の縦断面図、第
２図は第１図の機械的眼圧計の正面図、第３図は
第２図の機械的眼圧計の円で囲つたＡ部の拡大
図、第４図は従来の機械的眼圧計及び本発明の機
械的眼圧計で測つた眼内圧力値の比較を示すグラ
フ図である。
１……ケーシング、２……脚部、３……目盛
り、４……プランジヤ、７，８……光源、９……
反射鏡、１０……内芯、１１……針、１４……
軸、１５……支持部。
FIG. 1 is a longitudinal sectional view of the mechanical tonometer of the present invention, FIG. 2 is a front view of the mechanical tonometer of FIG. 1, and FIG. FIG. 4 is a graph showing a comparison of intraocular pressure values measured by a conventional mechanical tonometer and a mechanical tonometer according to the present invention. 1... Casing, 2... Leg, 3... Scale, 4... Plunger, 7, 8... Light source, 9...
Reflector, 10... Inner core, 11... Needle, 14...
Axis, 15...Support part.
Claims (1)
部２を有するケーシング１と、上記脚部２と反対
側のケーシング１内側に配設した目盛り３と、ケ
ーシング１内に可動状に設けられて上記脚部を通
してプランジヤの下部と検査すべき眼の角膜とを
相互作用させるように形成されたプランジヤ４と
を備えた機械的眼圧計において、 ケーシング１内には光源７，８と、上記プラン
ジヤ４と協同する反射鏡９とが収容され、上記プ
ランジヤ４の内芯１０は導光性材料で作られると
共に上記光源７，８から出た光の一部が通過する
ように形成され、他方上記反射鏡９によつて反射
した光の部分が上記目盛り３の方向に向けられた
ことを特徴とする機械的眼圧計。 ２ 反射鏡９がケーシング１内に配設した支持部
１５を有する軸１４に対して回動自在に設けられ
た特許請求の範囲第１項記載の機械的眼圧計。 ３ プランジヤ４が、眼の検査中に該プランジヤ
と共に移動可能でありかつ反射鏡９と相互作用を
して該反射鏡を軸１４の周りに回動させる針１１
を備えた特許請求の範囲第１項又は第２項記載の
機械的眼圧計。 ４ 支持部１５がケーシング１内に可動状に設け
られた特許請求の範囲第２項又は第３項記載の機
械的眼圧計。[Scope of Claims] 1. A casing 1 having a leg portion 2 formed to be in close contact with the eye to be examined, a scale 3 disposed inside the casing 1 on the opposite side to the leg portion 2, and a scale 3 disposed inside the casing 1 on the opposite side from the leg portion 2. A mechanical tonometer comprising a plunger 4 which is movably disposed on the casing 1 and configured to allow interaction between the lower part of the plunger and the cornea of the eye to be examined through the legs, the casing 1 including a light source 7. , 8 and a reflecting mirror 9 cooperating with the plunger 4, the inner core 10 of the plunger 4 is made of a light-guiding material and allows part of the light emitted from the light sources 7, 8 to pass through. A mechanical tonometer characterized in that the part of the light reflected by the reflecting mirror 9 is directed in the direction of the scale 3. 2. The mechanical tonometer according to claim 1, wherein the reflecting mirror 9 is rotatably provided about a shaft 14 having a support portion 15 disposed within the casing 1. 3 a needle 11 with which the plunger 4 is movable together with the plunger during an eye examination and interacts with the reflector 9 to rotate it about an axis 14;
A mechanical tonometer according to claim 1 or 2, comprising: 4. The mechanical tonometer according to claim 2 or 3, wherein the support portion 15 is movably provided within the casing 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU4023144 | 1986-02-25 | ||
| SU864023144A SU1430028A1 (en) | 1986-02-25 | 1986-02-25 | Mechanical tonometer with light indicator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62253030A JPS62253030A (en) | 1987-11-04 |
| JPH0349447B2 true JPH0349447B2 (en) | 1991-07-29 |
Family
ID=21221934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62039335A Granted JPS62253030A (en) | 1986-02-25 | 1987-02-24 | Mechanical tonometer |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS62253030A (en) |
| BG (1) | BG49519A1 (en) |
| DE (1) | DE3705374A1 (en) |
| FR (1) | FR2594679A1 (en) |
| HU (1) | HU199667B (en) |
| IT (1) | IT1218564B (en) |
| SU (1) | SU1430028A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6524243B1 (en) * | 2000-10-04 | 2003-02-25 | Jordan Technology Inc. | Tonometer incorporating an electrical measurement device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59125542A (en) * | 1982-12-29 | 1984-07-19 | ミノルタ株式会社 | Eye pressure meter |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3150520A (en) * | 1961-07-07 | 1964-09-29 | Univ California | Tonometer |
| US3248934A (en) * | 1963-02-25 | 1966-05-03 | Jr Henry W Matalene | Tonometers |
| DE1901532A1 (en) * | 1969-01-14 | 1970-08-20 | Licentia Gmbh | Device for measuring the amplitude of oscillation equipment |
| SU1044272A1 (en) * | 1980-12-03 | 1983-09-30 | Куйбышевский политехнический институт им.В.В.Куйбышева | Photoelectronograph |
-
1986
- 1986-02-25 SU SU864023144A patent/SU1430028A1/en active
-
1987
- 1987-02-19 HU HU87651A patent/HU199667B/en not_active IP Right Cessation
- 1987-02-20 DE DE19873705374 patent/DE3705374A1/en not_active Withdrawn
- 1987-02-24 IT IT41533/87A patent/IT1218564B/en active
- 1987-02-24 FR FR8702404A patent/FR2594679A1/en not_active Withdrawn
- 1987-02-24 JP JP62039335A patent/JPS62253030A/en active Granted
-
1988
- 1988-07-12 BG BG84856A patent/BG49519A1/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59125542A (en) * | 1982-12-29 | 1984-07-19 | ミノルタ株式会社 | Eye pressure meter |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3705374A1 (en) | 1987-11-12 |
| HU199667B (en) | 1990-03-28 |
| IT1218564B (en) | 1990-04-19 |
| SU1430028A1 (en) | 1988-10-15 |
| HUT46204A (en) | 1988-10-28 |
| BG49519A1 (en) | 1991-12-16 |
| JPS62253030A (en) | 1987-11-04 |
| IT8741533A0 (en) | 1987-02-24 |
| FR2594679A1 (en) | 1987-08-28 |
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