JPH0871042A - Near point meter - Google Patents
Near point meterInfo
- Publication number
- JPH0871042A JPH0871042A JP6234425A JP23442594A JPH0871042A JP H0871042 A JPH0871042 A JP H0871042A JP 6234425 A JP6234425 A JP 6234425A JP 23442594 A JP23442594 A JP 23442594A JP H0871042 A JPH0871042 A JP H0871042A
- Authority
- JP
- Japan
- Prior art keywords
- point position
- target
- optotype
- eye
- starting point
- 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.)
- Granted
Links
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、視標を遠近方向に移動
させて被検眼の近点を測定する近点計に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a near point meter for measuring a near point of an eye to be inspected by moving a target in a perspective direction.
【０００２】[0002]
【従来の技術】被検眼の近方距離での調節限界を測定す
る近点計が知られている。この装置は、被検眼に注視さ
せる視標を遠方方向から被検者に向かって移動し、被検
者に視標がぼけ始めたことを認識した位置を応答させ、
その位置を測定する。そして、こうした測定を数回繰り
返し、その測定結果の平均値を求める等の処理をして、
被検眼の近点距離を求める。この種の装置としては、測
定精度の向上を図るために被検者に向かう視標の移動速
度を、屈折力変化（ディオプタ変化）が一定となるよう
に移動させる装置も知られている。2. Description of the Related Art A near-point meter for measuring the accommodation limit of an eye to be examined at a short distance is known. This device moves the target to be gazed at the eye to be examined from the distant direction toward the subject, and causes the subject to respond with the position at which the target recognizes that the target has started to blur,
Measure its position. Then, repeating such measurement several times, performing processing such as obtaining an average value of the measurement results,
Find the near point distance of the eye. As this type of device, there is also known a device that moves the moving speed of the target toward the subject so that the refractive power change (diopter change) becomes constant in order to improve the measurement accuracy.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
装置は測定に時間がかかり、被検者や検者の負担が大き
いという問題点があった。特に屈折力変化が一定となる
ように視標を移動するものは、被検眼に近付くほどその
時間当たりの速度は非常に遅くなる。この場合、測定を
複数回繰り返すたびに遠方の初期位置に視標を戻し、再
びそこから視標を移動させることは、測定時間を多く要
するという欠点があった。本発明は、上記従来装置の欠
点に鑑み、測定時間の短縮化を図り、被検者に対する負
担を軽減して信頼性の高い測定結果を得ることのできる
近点計を提供することを技術課題とする。However, the conventional apparatus has a problem that it takes a long time for measurement, and the burden on the examinee and the examiner is large. In particular, in the case of moving the target so that the change in the refractive power becomes constant, the speed per unit time becomes extremely slower as the target is moved closer. In this case, there is a drawback in that it takes a long measurement time to return the target to the distant initial position each time the measurement is repeated a plurality of times and to move the target again. In view of the above-mentioned drawbacks of the conventional apparatus, the present invention aims to provide a near-point meter that can shorten the measurement time, reduce the burden on the subject, and obtain highly reliable measurement results. And
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に、本発明の近点計は次のような構成を有することを特
徴とする。 （１） 被検眼に呈示する視標を視標駆動手段により移
動して被検眼の近点を測定する近点計において、前に測
定した近点位置を記憶する記憶手段と、次の測定に際し
て視標の始点位置を該記憶手段の記憶位置に基づいて決
定する始点位置決定手段と、該始点位置決定手段により
決定された視標の始点位置に視標を移動するように前記
視標駆動手段を制御する制御手段と、を具備することを
特徴とする。In order to solve the above problems, the near point meter of the present invention is characterized by having the following configuration. (1) In a near point meter that measures the near point of the eye by moving the index to be presented to the eye to be examined by the index drive means, a storage means for storing the previously measured near point position, and the next measurement Starting point position determining means for determining the starting point position of the optotype based on the storage position of the storage means, and the optotype driving means for moving the optotype to the starting point position of the optotype determined by the starting point position determining means. And a control means for controlling.
【０００５】（２） （１）の始点位置決定手段は測定
された直近一回または数回の近点位置に基づいて決定す
ることを特徴とする。(2) The starting point position determining means of (1) is characterized in that the starting point position determining means determines the starting point position on the basis of the measured closest point position once or several times.
【０００６】（３） （２）の始点位置決定手段は直近
一回または数回の近点位置に基づいて定められる基準位
置に対して所定量後方に視標の始点位置を決定すること
を特徴とする。(3) The starting point position determining means of (2) is characterized in that the starting point position of the visual target is determined backward by a predetermined amount with respect to the reference position determined based on the closest or recent closest position. And
【０００７】（４） （３）の始点位置は前記基準位置
に対して所定ディオプタ分に相当する距離だけ後方にお
かれることを特徴とする。(4) The starting point position of (3) is characterized in that it is located behind the reference position by a distance corresponding to a predetermined diopter.
【０００８】（５） 被検眼に呈示する視標を視標駆動
手段により移動して被検眼の近点を測定する近点計にお
いて、前に測定した近点位置を記憶する記憶手段と、次
の測定に際して視標の始点位置を該記憶手段の記憶位置
に基づいて決定する始点位置決定手段と、該始点位置決
定手段により決定された視標の始点位置に視標を移動す
るように前記視標駆動手段を制御する始点位置制御手段
と、該始点位置から視標を時間あたりのディオプタ変化
がほぼ等しく移動するように前記視標駆動手段を制御す
る視標速度制御手段を具備することを特徴とする。(5) In the near point meter for measuring the near point of the eye to be examined by moving the target to be presented to the subject eye by the target driving means, a storage means for storing the previously measured near point position, and At the time of measuring, the starting point position determining means for determining the starting point position of the target based on the storage position of the storage means, and the visual target so as to move the target to the starting point position of the target determined by the starting point position determining means. A start point position control means for controlling the target driving means; and a target speed control means for controlling the target driving means so that the target moves from the start point position so that diopter changes per unit time are substantially equal. And
【０００９】[0009]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図１は実施例の装置の構成を説明する外観略図
である。１は被検眼に注視用の視標を呈示する視標呈示
ユニットである。視標呈示ユニット１の被検眼に対向す
る側には乳白色のフィルム等の視標板に描かれた３つの
視標２ａ，２ｂ，２ｃが配置されている。２ａは右眼注
視用、２ｂは左眼注視用、３ｃは両眼注視用の視標であ
る。各視標の背後にはそれぞれを照明する３つのランプ
が設けられており、ランプの点灯により視標が個別に呈
示される。３は視標呈示ユニット１を支持する移動支基
である。移動支基３は、基台４に立設する支柱５ａ、５
ｂに架設された２本のガイド軸６に沿って移動する。視
標移動機構は、支柱５ａに取り付けられたパルスモ−タ
７と、パルスモ−タ７の回転軸に設けられた駆動プ−リ
−８と、同じくプ−リ−８の対側の支柱５ｂに設けられ
た回転プ−リ−９と、プ−リ−８に巻き付けられるとと
もにプ−リ−９に張設され、その両端を移動支基３に固
定されたワイヤ−１０で構成される。この移動機構によ
り視標呈示ユニット１の視標面は、被検眼に対し４０ｃ
ｍの初期位置から５ｃｍの距離まで移動する。１１は移
動支基３の後方移動の限界を検出するセンサであり、セ
ンサ１１は移動支基３を検出して視標の位置を決定する
基準ともしている。また、支柱５ｂ側にも前方の移動限
界を検出するセンサが設けられている。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic external view for explaining the configuration of the apparatus of the embodiment. Reference numeral 1 is an optotype presenting unit for presenting an optotype for gazing to the eye to be inspected. On the side of the optotype presenting unit 1 facing the eye to be examined, three optotypes 2a, 2b and 2c drawn on a optotype plate such as a milky white film are arranged. Reference numeral 2a is a right eye gazing target, 2b is a left eye gazing target, and 3c is a binocular gazing target. Behind each optotype, three lamps are provided to illuminate each optotype, and the optotypes are individually presented by lighting the lamps. Reference numeral 3 denotes a moving support base that supports the optotype presenting unit 1. The moving support base 3 is provided with columns 5a and 5 which are erected on the base 4.
It moves along the two guide shafts 6 installed on b. The target moving mechanism includes a pulse motor 7 attached to the column 5a, a drive pulley 8 provided on the rotating shaft of the pulse motor 7, and a column 5b on the opposite side of the pulley 8 as well. The rotary pulley 9 is provided, and the wire 10 is wound around the pulley 8 and stretched around the pulley 9, and both ends of the wire 10 are fixed to the moving support base 3. With this moving mechanism, the optotype surface of the optotype presenting unit 1 is 40c relative to the subject's eye.
Move to a distance of 5 cm from the initial position of m. Reference numeral 11 denotes a sensor that detects the limit of rearward movement of the movement support base 3, and the sensor 11 also serves as a reference for detecting the movement support base 3 and determining the position of the target. Further, a sensor for detecting the forward movement limit is also provided on the column 5b side.
【００１０】２０は被検眼を固定するための顎載せ部で
ある。２１は基台４に固設された顎載せ支基であり、２
２は顎載せ支基２１に対して上下動可能な顎台である。
２３は顎台２２を上下させる顎台ノブである。２４は顎
載せ支基２１に垂設された２本の支柱であり、その上端
には額当て支基２５が架設されている。額当て支基２５
には取付け板２６により前後移動可能な額当て２７が取
り付けられている。２８は額当て２７を前後移動させる
額当て調整ノブである。Reference numeral 20 is a chin rest for fixing the eye to be examined. Reference numeral 21 denotes a chin rest support base fixedly mounted on the base 4.
Reference numeral 2 denotes a chin rest that can move up and down with respect to the chin rest support base 21.
Reference numeral 23 is a chin rest knob for moving the chin rest 22 up and down. Reference numeral 24 denotes two columns vertically provided on the chin rest support base 21, and a forehead support base 25 is erected on the upper end thereof. Forehead support base 25
A forehead support 27 that can be moved back and forth by a mounting plate 26 is attached to the. Reference numeral 28 denotes a forehead support adjusting knob for moving the forehead support 27 back and forth.
【００１１】３０は非測定眼の遮蔽を行うとともに近点
が遠い被検眼に対して補正レンズを配置するための目当
てユニットである。３１は被検眼が覗くリング窓であ
り、リング窓３１には補正レンズ３２を受けるための図
示なき受け部が形成されている。補正レンズは＋２．０
Ｄ（ディオプタ）のものを使用し、検査距離を５．５ｃ
ｍ〜２００ｃｍにする。３３はリング窓３１を保持する
目当て板であり、目当て板３３は支柱２４に取り付けら
れた支持機構部３５に前後移動可能に支持されている。
目当て板３３は眼鏡をかけた状態の被検眼を測定する場
合に後方へ移動する。３６は前後調整ノブである。ま
た、目当て板３３その上端を左右に移動することのでき
る遮蔽板３７が設けられている。３８は透明な部材に目
盛りが付された角膜頂点位置合せ用の目盛り板である。Reference numeral 30 denotes an eye contact unit for shielding the non-measurement eye and arranging a correction lens for the eye to be examined whose near point is far. Reference numeral 31 denotes a ring window through which the eye to be inspected, and a receiving portion (not shown) for receiving the correction lens 32 is formed in the ring window 31. Correction lens is +2.0
Use the D (diopter) one, and the inspection distance is 5.5c
m to 200 cm. Reference numeral 33 denotes an eye contact plate that holds the ring window 31, and the eye contact plate 33 is supported by a support mechanism portion 35 attached to the support column 24 so as to be movable back and forth.
The eye contact plate 33 moves rearward when measuring the eye to be inspected while wearing glasses. Reference numeral 36 is a front-back adjustment knob. Further, a shielding plate 37 that can move the upper end of the eye contact plate 33 to the left and right is provided. Reference numeral 38 is a scale plate for corneal apex position alignment in which a transparent member is scaled.
【００１２】基台４には視標呈示ユニット１をマニュア
ル移動させるための前後移動スイッチ４０、被検者が握
る応答スイッチ４１、検者用操作部４２が配置されてい
る。On the base 4, there are arranged a forward / backward movement switch 40 for manually moving the optotype presenting unit 1, a response switch 41 grasped by a subject, and an examiner operation section 42.
【００１３】図２は操作部４２の構成を説明する図であ
る。５０は測定をスタ−トさせるスタ−トスイッチ、５
１は両眼測定または片眼の左右を選択する測定眼切換ス
イッチ、５２は測定眼の矯正の有無を入力するスイッ
チ、５３は補正レンズを用いた場合に後述する制御回路
にデ−タ補正をさせる補正レンズスイッチである。５４
は視標呈示ユニット１の移動速度を被検者の反応状況に
応じて切換える速度切換スイッチである。移動速度は
０．２Ｄ／秒と０．４Ｄ／秒の２種類の等ディオプタ速
度と、等速度（２．４ｃｍ／秒）の計３種類から選択で
きる。５５は計測終了スイッチ、５６は近点距離をデジ
タル表示する表示部である。FIG. 2 is a view for explaining the structure of the operation section 42. 50 is a start switch for starting measurement, 5
Reference numeral 1 is a measurement eye changeover switch for selecting the binocular measurement or left or right of one eye, 52 is a switch for inputting the presence or absence of correction of the measurement eye, and 53 is a data correction to a control circuit described later when a correction lens is used. It is a correction lens switch to be. 54
Is a speed change switch for changing the moving speed of the optotype presenting unit 1 according to the reaction situation of the subject. The moving speed can be selected from two kinds of equal diopter speeds of 0.2 D / second and 0.4 D / second and a total of three kinds of constant speed (2.4 cm / second). 55 is a measurement end switch, and 56 is a display unit for digitally displaying the near point distance.
【００１４】以上のような構成の装置において、その動
作を図３に示す要部制御系ブロック図を利用して説明す
る。検者は、被検者の顔を顎載せ部に位置させる。この
とき、被検者が眼鏡装用状態である場合は、目当てユニ
ット３０を後方へ移動させる。続いて、目盛り板３８の
基準位置に被検眼の角膜頂点がくるように額当てノブ２
８、顎台ノブ２３により被検眼位置を調節する。また、
測定眼に応じて遮蔽板３７をスライドさせ、非測定眼を
遮蔽する。The operation of the apparatus having the above configuration will be described with reference to the block diagram of the main control system shown in FIG. The examiner positions the subject's face on the chin rest. At this time, when the subject is wearing eyeglasses, the eyepiece unit 30 is moved backward. Then, the forehead support knob 2 is set so that the apex of the cornea of the eye to be examined comes to the reference position of the scale plate 38.
8. Adjust the eye position with the chin rest knob 23. Also,
The shielding plate 37 is slid according to the measurement eye to shield the non-measurement eye.
【００１５】被検者側の準備ができたら、測定を開始す
る。測定は、まず測定眼切換スイッチ５１により測定眼
を選択する。スイッチ５１からの信号は制御回路６０に
入力され、制御回路６０は駆動回路６１〜６３を介し右
眼用視標照明ランプ６４、左眼視標照明ランプ６５また
は両眼用視標照明ランプ６６を入力された信号にしたが
って点灯する。また、制御回路６０は駆動回路６７を介
しパルスモ−タ７を駆動して視標呈示ユニット１を最奥
の位置に位置させる。When the subject is ready, the measurement is started. For measurement, first, the measurement eye is selected by the measurement eye changeover switch 51. A signal from the switch 51 is input to the control circuit 60, and the control circuit 60 drives the right eye target illumination lamp 64, the left eye target illumination lamp 65, or the binocular target illumination lamp 66 via the drive circuits 61 to 63. Lights according to the input signal. Further, the control circuit 60 drives the pulse motor 7 via the drive circuit 67 to position the optotype presenting unit 1 at the innermost position.
【００１６】次に第１回の測定を行うための視標の始点
位置を決定するための予備測定のステップを実行する。
検者は最奥に位置する視標呈示ユニット１の視標が明視
できるかを確認する。近点が遠くて見えない被検眼の場
合は、補正レンズ３２を用いるとともに補正レンズスイ
ッチ５３をＯＮにする。制御回路６０はスイッチ５３の
信号を受けると近点距離の算出等において補正レンズ３
２分（実施例では２．０Ｄ）の補正をかける。また、近
視眼で初期位置の視標がはっきり見えない被検眼の場合
は、前後移動スイッチ４０を操作して視標を視認できる
位置まで移動する。被検者の視認状態を確認した後、ス
タ−トスイッチ５０を押して視標移動を開始させる。計
測終了スイッチまたは測定眼切換スイッチ５１が押され
た後のスタ−ト信号に対しては、制御回路６０はパルス
モ−タ７を駆動して視標を等速で移動させる。被検者は
向かって進んでくる視標が明視できなくなったら、応答
スイッチ４１を押す。制御回路６０は応答スイッチ４１
の信号を受けてパルスモ−タ７の駆動を一旦止めた後、
その時の位置より１．５Ｄ（ディオプタ）に相応する距
離分だけ視標を後方に戻して停止させる。Next, the step of preliminary measurement for determining the starting point position of the optotype for performing the first measurement is executed.
The examiner confirms whether the optotype of the optotype presenting unit 1 located at the innermost position can be clearly seen. In the case of the eye to be inspected where the near point is distant and cannot be seen, the correction lens 32 is used and the correction lens switch 53 is turned on. When the control circuit 60 receives the signal from the switch 53, the control lens 60 calculates the near point distance, etc.
A correction of 2 minutes (2.0D in the example) is applied. Further, in the case of the eye to be inspected in which the optotype at the initial position cannot be clearly seen by the myopic eye, the forward / backward movement switch 40 is operated to move the optotype to a position where the optotype can be visually recognized. After confirming the visual recognition state of the subject, the start switch 50 is pressed to start moving the target. In response to the start signal after the measurement end switch or the measurement eye changeover switch 51 is pressed, the control circuit 60 drives the pulse motor 7 to move the target at a constant speed. The examinee pushes the response switch 41 when he cannot see the moving target. The control circuit 60 uses the response switch 41.
After stopping the driving of the pulse motor 7 in response to the signal of
The target is returned to the rear by a distance corresponding to 1.5D (diopter) from the position at that time and stopped.
【００１７】次に本測定のステップを実行する。検者は
被検者に視標が視認できることを確認し、再びスタ−ト
スイッチ５０を押す。制御回路６０は先ほどの停止位置
を始点として視標を被検眼方向に移動する。制御回路６
０は２回目以降のスタ−トスイッチ信号に対しては、時
間あたりのディオプタ変化が一定になるように等ディオ
プタ速度（速度切換スイッチ５４で選択された速度）で
視標を移動する。被検者により応答スイッチ４１が押さ
れると、制御回路６０はパルスモ−タ７の駆動を止め、
再びその位置より１．５Ｄ（ディオプタ）の距離分だけ
視標を戻す。装置は、この２度目の応答スイッチ４１の
入力がなされた時を第１回目の測定値として記憶する。
測定値はパルスモ−タ７の駆動デ−タに基づいて算出さ
れ（補正レンズ３２が使用されるときは補正され）、メ
モリに記憶される。Next, the main measurement step is executed. The examiner confirms that the visual target can be visually recognized by the subject, and presses the start switch 50 again. The control circuit 60 moves the visual target in the direction of the eye to be inspected, starting from the previous stop position. Control circuit 6
For 0, for the second and subsequent start switch signals, the target is moved at an equal diopter speed (speed selected by the speed changeover switch 54) so that the diopter change per time becomes constant. When the response switch 41 is pressed by the subject, the control circuit 60 stops driving the pulse motor 7,
The target is returned by a distance of 1.5 D (diopter) from that position again. The device stores the time when the response switch 41 is input for the second time as the first measured value.
The measured value is calculated based on the drive data of the pulse motor 7 (corrected when the correction lens 32 is used) and stored in the memory.
【００１８】第２回目以降の測定もスタ−トスイッチ５
０を押すことにより開始する。こうした動作を繰り返
し、装置は所定回数（例えば３回）の測定値が得られる
と、その中央値を測定結果として表示部５６に点滅表示
する。The start switch 5 is used for the second and subsequent measurements.
Start by pressing 0. When the operation is repeated and the measured value is obtained a predetermined number of times (for example, three times), the median value is blinked and displayed on the display unit 56 as the measurement result.
【００１９】測定眼を変える場合は、測定眼切換スイッ
チ５１を押す。スイッチ５１の信号入力があると、制御
回路６０は視標照明ランプの点灯を切換えるとともに、
視標を最奥に戻して上記と同様に測定する。この場合、
視標を最奥に戻す代わりに前述の測定眼の始点位置を参
考にして決めても良い（同一またはプラスα）。以上の
ようにしてすべての検査を終えたら終了スイッチ５５を
押す。測定結果はプリンタ７０により印字出力されると
ともに、ＩＣカ−ドライ４２によりＩＣカ−ドにデ−タ
転送される。When changing the measuring eye, the measuring eye changeover switch 51 is pushed. When there is a signal input from the switch 51, the control circuit 60 switches lighting of the target illumination lamp and
Return the target to the innermost position and measure as above. in this case,
Instead of returning the target to the innermost position, it may be determined by referring to the starting point position of the measurement eye (same or plus α). When all the inspections are completed as described above, the end switch 55 is pushed. The measurement result is printed out by the printer 70 and transferred to the IC card by the IC card dry 42.
【００２０】実施例においては直前の近点位置を基準と
して１．５Ｄ相当分の距離だけ視標を移動した位置を次
の測定の始点位置としたが、１．５Ｄは、例としてあげ
たにすぎずこれに限られるものでなく、また直前の１回
の測定値を基準とするだけではなく数回の平均や異常値
を取り除く等の処理を加えても良い。なお、本発明は等
ディオプタ速度以外で視標を移動させる装置でも使用で
きることはいうまでもない。In the embodiment, the position at which the target is moved by a distance corresponding to 1.5D based on the immediately preceding near point position is set as the starting point position for the next measurement, but 1.5D is given as an example. However, the present invention is not limited to this, and it is also possible to add not only the immediately preceding measured value as a reference but also several times an average or removal of an abnormal value. It goes without saying that the present invention can also be used in a device that moves a target at a speed other than the equal diopter speed.
【００２１】[0021]
【発明の効果】以上説明したように、本発明の近点計に
よれば、繰り返しの測定における呈示視標の戻る距離を
前の測定値に基づいて定めたので、視標移動時間が短く
なり、測定時間全体を短縮することができる。この結
果、被検者に対する負担も軽減でき、誤差の少ない測定
結果を得ることができる。また、測定時間の短縮によ
り、集団検診等においては多くの被検者を効率的に検査
することができる。As described above, according to the near point meter of the present invention, since the return distance of the presented optotype in the repeated measurement is determined based on the previous measurement value, the optotype moving time is shortened. , The whole measuring time can be shortened. As a result, the burden on the subject can be reduced, and measurement results with less error can be obtained. Further, by shortening the measurement time, it is possible to efficiently inspect a large number of subjects in group medical examinations and the like.
【図１】図１は実施例の装置の構成を説明する外観略図
である。FIG. 1 is a schematic external view illustrating a configuration of an apparatus according to an embodiment.
【図２】図２は操作部４２の構成を説明する図である。FIG. 2 is a diagram illustrating a configuration of an operation unit 42.
【図３】装置の要部制御系ブロック図を示す図である。FIG. 3 is a diagram showing a block diagram of a main control system of the apparatus.
１ 視標呈示ユニット ７ パルスモ−タ ４１ 応答スイッチ ４２ 操作部 ６０ 制御回路 ６１〜６９ 駆動回路 DESCRIPTION OF SYMBOLS 1 Target presentation unit 7 Pulse motor 41 Response switch 42 Operation part 60 Control circuit 61-69 Drive circuit
───────────────────────────────────────────────────── フロントページの続き (72)発明者 伴 幸信 愛知県蒲郡市拾石町前浜34番地14 株式会 社ニデック拾石工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Yukinobu 34-3 Maehama, Tengishi-cho, Gamagori-shi, Aichi 14 Stock company, Nidek Tateishi factory
Claims (5)
より移動して被検眼の近点を測定する近点計において、
前に測定した近点位置を記憶する記憶手段と、次の測定
に際して視標の始点位置を該記憶手段の記憶位置に基づ
いて決定する始点位置決定手段と、該始点位置決定手段
により決定された視標の始点位置に視標を移動するよう
に前記視標駆動手段を制御する制御手段と、を具備する
ことを特徴とする近点計。1. A near point meter for measuring a near point of an eye to be examined by moving an index to be presented to the eye to be examined by a target driving means,
The storage means for storing the previously measured near point position, the start point position determining means for determining the start point position of the optotype in the next measurement based on the storage position of the storage means, and the start point position determining means And a control means for controlling the optotype driving means so as to move the optotype to the starting point position of the optotype.
または本測定で測定された直近一回または数回の近点位
置に基づいて決定することを特徴とする近点計。2. The near point meter according to claim 1, wherein the starting point position determining means makes a determination based on the most recent or most recent near point positions measured in preliminary measurement or main measurement.
または数回の近点位置に基づいて定められる基準位置に
対して所定量後方に視標の始点位置を決定することを特
徴とする近点計。3. The starting point position determining means according to claim 2, wherein the starting point position of the visual target is determined by a predetermined amount behind a reference position determined based on the closest point position once or a few times. A near point meter.
して所定ディオプタ分に相当する距離だけ後方に置かれ
ることを特徴とする近点計。4. The near point meter according to claim 3, wherein the starting point position is located behind the reference position by a distance corresponding to a predetermined diopter.
より移動して被検眼の近点を測定する近点計において、
前に測定した近点位置を記憶する記憶手段と、次の測定
に際して視標の始点位置を該記憶手段の記憶位置に基づ
いて決定する始点位置決定手段と、該始点位置決定手段
により決定された視標の始点位置に視標を移動するよう
に前記視標駆動手段を制御する始点位置制御手段と、該
始点位置から視標を時間あたりのディオプタ変化がほぼ
等しく移動するように前記視標駆動手段を制御する視標
速度制御手段を具備することを特徴とする近点計。5. A near point meter for measuring a near point of an eye to be examined by moving an index to be presented to the eye to be examined by a target driving means,
The storage means for storing the previously measured near point position, the start point position determining means for determining the start point position of the optotype in the next measurement based on the storage position of the storage means, and the start point position determining means Starting point position control means for controlling the optotype driving means so as to move the optotype to the starting point position of the optotype, and driving the optotype so as to move the optotype from the starting point position so that the diopter change per time is approximately equal. A near-point meter characterized by comprising optotype speed control means for controlling the means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23442594A JP3542176B2 (en) | 1994-09-02 | 1994-09-02 | Perimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23442594A JP3542176B2 (en) | 1994-09-02 | 1994-09-02 | Perimeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0871042A true JPH0871042A (en) | 1996-03-19 |
| JP3542176B2 JP3542176B2 (en) | 2004-07-14 |
Family
ID=16970824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23442594A Expired - Lifetime JP3542176B2 (en) | 1994-09-02 | 1994-09-02 | Perimeter |
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| Country | Link |
|---|---|
| JP (1) | JP3542176B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005052677A (en) * | 2004-11-22 | 2005-03-03 | Nidek Co Ltd | Visual acuity testing apparatus |
| JP2006158434A (en) * | 2004-12-02 | 2006-06-22 | Railway Technical Res Inst | Portable perspective perception measuring apparatus |
| CN103230253A (en) * | 2013-04-27 | 2013-08-07 | 深圳职业技术学院 | Eye adjustment strength training deivce and method |
| CN105231988A (en) * | 2015-11-16 | 2016-01-13 | 中国人民解放军海军总医院 | Method for regulating sighting mark moving speed in dynamic visual acuity testing system |
| CN110974153A (en) * | 2019-11-05 | 2020-04-10 | 温州市中心医院 | Slit lamp head position fixing device |
-
1994
- 1994-09-02 JP JP23442594A patent/JP3542176B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005052677A (en) * | 2004-11-22 | 2005-03-03 | Nidek Co Ltd | Visual acuity testing apparatus |
| JP2006158434A (en) * | 2004-12-02 | 2006-06-22 | Railway Technical Res Inst | Portable perspective perception measuring apparatus |
| CN103230253A (en) * | 2013-04-27 | 2013-08-07 | 深圳职业技术学院 | Eye adjustment strength training deivce and method |
| CN105231988A (en) * | 2015-11-16 | 2016-01-13 | 中国人民解放军海军总医院 | Method for regulating sighting mark moving speed in dynamic visual acuity testing system |
| CN110974153A (en) * | 2019-11-05 | 2020-04-10 | 温州市中心医院 | Slit lamp head position fixing device |
| CN110974153B (en) * | 2019-11-05 | 2022-02-08 | 温州市中心医院 | Slit lamp head position fixing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3542176B2 (en) | 2004-07-14 |
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