JP2915410B2 - Eye refraction measuring device - Google Patents

Eye refraction measuring device

Info

Publication number
JP2915410B2
JP2915410B2 JP62275134A JP27513487A JP2915410B2 JP 2915410 B2 JP2915410 B2 JP 2915410B2 JP 62275134 A JP62275134 A JP 62275134A JP 27513487 A JP27513487 A JP 27513487A JP 2915410 B2 JP2915410 B2 JP 2915410B2
Authority
JP
Japan
Prior art keywords
eye
measurement
measuring
diopter
denotes
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 - Fee Related
Application number
JP62275134A
Other languages
Japanese (ja)
Other versions
JPH01119229A (en
Inventor
嘉 小早川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP62275134A priority Critical patent/JP2915410B2/en
Publication of JPH01119229A publication Critical patent/JPH01119229A/en
Application granted granted Critical
Publication of JP2915410B2 publication Critical patent/JP2915410B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、被検眼の屈折力を測定する眼屈折力測定装
置に関するものである。 [従来の技術] 従来、この種の眼屈折力測定装置においては、一般に
測定釦を押してから視度誘導を開始しているため、測定
に要する時間は視度誘導に要する時間と、実際に眼屈折
力を測定する時間とを加算した時間となる。最近では、
実際に眼屈折力を測定する時間はかなり短縮されてきた
が、視度誘導には相当の時間を要するため、全体の測定
時間は殆ど短縮されていない。 これらは時間が掛かるということだけでなく、測定時
間が長いと眼の安定しない被検者の場合は、測定中に眼
が動いて測定不能になるとか、測定値が不正確になる等
の問題を有している。 [発明の目的] 本発明の目的は、測定時間を短縮し、また装置と被検
者との相対位置関係が安定しない場合でも確実に測定が
できる操作容易な眼屈折力測定装置を提供することにあ
る。 [発明の概要] 上述の目的を達成するための本発明に係る眼屈折力測
定装置は、被検眼の屈折測定を測定する測定系と、該測
定系による測定に基づいて視度を調節する視標系と、被
検眼を検知する検知手段と、アライメントが完了する以
前に前記検知手段の検知に基づいて自動的に前記視標系
の調節を開始する制御手段とを有することを特徴とす
る。 [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。 第1図は本発明に係る眼屈折力測定装置の概要を示
し、測定系及び視度誘導系を内蔵する装置本体1は、架
台2に対して調整自在に支持され、架台2には電源スイ
ッチ3、操作杆4が備えられ、操作杆4の上部には測定
釦5が突出されている。また、装置本体1の前方には被
検者Sの顔を固定する顔固定台6が設けられ、顔固定台
6は架台2に取り付けられている。 第2図は被検者の顔が所定位置にあることを検知する
検知手段を示し、装置本体1に内蔵された光源10からの
光をレンズ11及び光分割部材12を介して被検眼の角膜C
に投射し、その反射光を光分割部材12で反射させ、レン
ズ13を介して受光素子14で受光するようにされている。
この場合は、受光素子14に一定以上の光が入射すること
により、顔固定台6に被検者Sの顔があることを検知す
ることができる。 第3図は制御システムの一例を示し、制御手段15に第
2図に例示したような検知手段16、測定系17、視度誘導
系18が接続されている。装置本体1に内蔵されている視
度誘導系18は、測定系17により得られた眼屈折力を基に
視標の見掛け上の距離を逐次換えて、被検者Sに呈示す
ることにより被検眼の調節を除き、遠点における測定を
保証する働きをなすものであり、この視度誘導系18が必
要とするアライメント精度は測定系17に比べて低くても
よい。 制御手段15はCPUを含み全系の制御を行うものであ
り、検知手段16から測定操作開始の信号を受けると、直
ちに測定系17と視度誘導系18に作動開始の信号を送り、
測定系17によって得られた眼屈折力の測定値に応じて、
視度誘導系18の視標の位置を逐次変えながら被検眼の視
度を遠点に誘導する。 この段階でのアライメントはそれほど良くないが、視
度誘導は可能である。その間に検者は操作杆4によって
装置本体1を動かしてアライメントを行う。アライメン
トが完了し、検者が測定釦5を押すまでには視度誘導は
ほぼ完了しているので、測定釦5が押されると最終的な
眼屈折力の測定が瞬時に行われ、直ちに測定結果が得ら
れることになる。 [発明の効果] 以上説明したように本発明に係る眼屈折力測定装置に
よれば、測定時間が短縮され、また装置と被検者との相
対位置関係が安定しない場合でも正確の測定ができる。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eye refractive power measuring device that measures the refractive power of an eye to be examined. [Prior Art] Conventionally, in this type of eye refractive power measuring apparatus, since diopter guidance is generally started after a measurement button is pressed, the time required for measurement is the same as the time required for diopter guidance, This is the time obtained by adding the time for measuring the refractive power. recently,
Although the time for actually measuring the refractive power of the eye has been considerably reduced, since the diopter guidance requires a considerable time, the overall measurement time is hardly reduced. These are not only time-consuming, but if the measurement time is long, the eye may not be stable if the measurement time is too long. have. [Object of the Invention] An object of the present invention is to provide an easy-to-operate eye-refractive-power measuring apparatus capable of shortening the measuring time and reliably measuring even when the relative positional relationship between the apparatus and the subject is not stable. It is in. [Summary of the Invention] An eye-refractive-power measuring apparatus according to the present invention for achieving the above-described object has a measuring system for measuring refraction measurement of an eye to be inspected, and a vision system for adjusting diopter based on the measurement by the measuring system. It is characterized by comprising a target system, detection means for detecting an eye to be inspected, and control means for automatically starting adjustment of the target system based on detection by the detection means before alignment is completed. [Embodiment of the Invention] The present invention will be described in detail based on the illustrated embodiment. FIG. 1 shows an outline of an eye refractive power measuring apparatus according to the present invention. An apparatus main body 1 containing a measuring system and a diopter guidance system is supported on a gantry 2 so as to be adjustable. 3, an operation rod 4 is provided, and a measurement button 5 is projected above the operation rod 4. Further, a face fixing base 6 for fixing the face of the subject S is provided in front of the apparatus main body 1, and the face fixing base 6 is attached to the gantry 2. FIG. 2 shows a detecting means for detecting that the face of the subject is at a predetermined position. The light from a light source 10 built in the apparatus main body 1 is transmitted through a lens 11 and a light splitting member 12 to the cornea of the subject's eye. C
And the reflected light is reflected by the light splitting member 12 and received by the light receiving element 14 via the lens 13.
In this case, it is possible to detect that the face of the subject S is present on the face fixing base 6 when a certain amount of light is incident on the light receiving element 14. FIG. 3 shows an example of the control system. The control means 15 is connected to the detection means 16, the measurement system 17, and the diopter guidance system 18 as exemplified in FIG. The diopter guidance system 18 built in the apparatus main body 1 sequentially changes the apparent distance of the optotype based on the eye refractive power obtained by the measurement system 17 and presents it to the subject S by presenting it. Except for the adjustment of the optometry, it serves to guarantee the measurement at the distant point, and the alignment accuracy required by the diopter guidance system 18 may be lower than that of the measurement system 17. The control means 15 controls the entire system including the CPU, and upon receiving a signal for starting a measurement operation from the detection means 16, immediately sends an operation start signal to the measurement system 17 and the diopter guidance system 18,
According to the measured value of the eye refractive power obtained by the measurement system 17,
The diopter of the eye to be examined is guided to the far point while the position of the target of the diopter guidance system 18 is sequentially changed. The alignment at this stage is not very good, but diopter guidance is possible. In the meantime, the examiner moves the apparatus main body 1 with the operation rod 4 to perform alignment. Since the alignment is completed and the diopter guidance is almost completed by the time the examiner presses the measurement button 5, when the measurement button 5 is pressed, the final measurement of the eye refractive power is instantaneously performed, and the measurement is immediately performed. The result will be obtained. [Effect of the Invention] As described above, according to the eye-refractive-power measuring apparatus according to the present invention, the measurement time is shortened, and accurate measurement can be performed even when the relative positional relationship between the apparatus and the subject is not stable. .

【図面の簡単な説明】 図面は本発明に係る眼屈折力測定装置の実施例を示し、
第1図はその概要図、第2図は検知手段の構成図、第3
図は制御系のブロック図である。 符号1は装置本体、2は架台、3は電源スイッチ、4は
操作杆、5は測定釦、6は顔固定台、10は光源、12は光
分割部材、14は受光素子、15は制御手段、16は検知手
段、17は測定系、18は視度誘導系である。
BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of an eye-refractive-power measuring apparatus according to the present invention,
FIG. 1 is a schematic diagram, FIG. 2 is a configuration diagram of a detecting means, FIG.
The figure is a block diagram of the control system. Reference numeral 1 denotes an apparatus main body, 2 denotes a frame, 3 denotes a power switch, 4 denotes an operation lever, 5 denotes a measurement button, 6 denotes a face fixing base, 10 denotes a light source, 12 denotes a light splitting member, 14 denotes a light receiving element, and 15 denotes control means. , 16 are detection means, 17 is a measurement system, and 18 is a diopter guidance system.

フロントページの続き (56)参考文献 特開 昭62−207431(JP,A) 特開 昭60−185942(JP,A) 特開 昭61−185244(JP,A) 特開 昭60−145119(JP,A) 特開 昭60−31729(JP,A) 特開 昭56−125032(JP,A) 特開 昭61−135632(JP,A) 特開 昭56−104640(JP,A) 特開 昭60−225537(JP,A) 特開 昭60−139237(JP,A) 実開 昭58−174250(JP,U) (58)調査した分野(Int.Cl.6,DB名) A61B 3/103 Continuation of the front page (56) References JP-A-62-207431 (JP, A) JP-A-60-185942 (JP, A) JP-A-61-185244 (JP, A) JP-A-60-145119 (JP, A) JP-A-60-31729 (JP, A) JP-A-56-125032 (JP, A) JP-A-61-135632 (JP, A) JP-A-56-104640 (JP, A) 60-225537 (JP, A) JP-A-60-139237 (JP, A) JP-A-58-174250 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) A61B 3/103

Claims (1)

(57)【特許請求の範囲】 1.被検眼の屈折測定を測定する測定系と、該測定系に
よる測定に基づいて視度を調節する視標系と、被検眼を
検知する検知手段と、アライメントが完了する以前に前
記検知手段の検知に基づいて自動的に前記視標系の調節
を開始する制御手段とを有することを特徴とする眼屈折
測定装置。
(57) [Claims] A measuring system for measuring the refraction measurement of the eye to be inspected, an optotype system for adjusting the diopter based on the measurement by the measuring system, a detecting means for detecting the eye to be inspected, and detection by the detecting means before the alignment is completed. Control means for automatically starting the adjustment of the optotype system on the basis of the eye refraction system.
JP62275134A 1987-10-30 1987-10-30 Eye refraction measuring device Expired - Fee Related JP2915410B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62275134A JP2915410B2 (en) 1987-10-30 1987-10-30 Eye refraction measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62275134A JP2915410B2 (en) 1987-10-30 1987-10-30 Eye refraction measuring device

Publications (2)

Publication Number Publication Date
JPH01119229A JPH01119229A (en) 1989-05-11
JP2915410B2 true JP2915410B2 (en) 1999-07-05

Family

ID=17551170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62275134A Expired - Fee Related JP2915410B2 (en) 1987-10-30 1987-10-30 Eye refraction measuring device

Country Status (1)

Country Link
JP (1) JP2915410B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3015052B2 (en) * 1989-09-22 2000-02-28 キヤノン株式会社 Eye refractometer
JPH04226621A (en) * 1990-12-29 1992-08-17 Canon Inc Ophthalmorefractometer
TW339399B (en) * 1996-07-10 1998-09-01 Sharp Kk Cooking apparatus sequentially displaying cooking methods on its display and cooking methods using such cooking apparatus
JPH1147094A (en) * 1997-08-05 1999-02-23 Canon Inc Eye examination device
JP3088993B2 (en) * 1997-10-15 2000-09-18 株式会社コーナン Ophthalmic equipment

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5834128B2 (en) * 1980-01-26 1983-07-25 持田製薬株式会社 intraocular pressure measuring device
JPS56125032A (en) * 1980-03-07 1981-10-01 Nippon Chemical Ind Optometry apparatus
JPS6031729A (en) * 1983-07-30 1985-02-18 キヤノン株式会社 Eye refraction examination apparatus
JPS60145119A (en) * 1983-12-30 1985-07-31 キヤノン株式会社 Measurement of refractive power of eye
JPS61135632A (en) * 1984-12-06 1986-06-23 キヤノン株式会社 Apparatus for examining eye refraction
JPS61185244A (en) * 1985-02-12 1986-08-18 キヤノン株式会社 Apparatus for detecting eye examination position
JPS62207431A (en) * 1986-03-08 1987-09-11 キヤノン株式会社 Ophthalminc measuring apparatus such as vision analyser

Also Published As

Publication number Publication date
JPH01119229A (en) 1989-05-11

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