JPS6417622A - Convergence apparatus of subjective eye refractivity measuring apparatus - Google Patents

Convergence apparatus of subjective eye refractivity measuring apparatus

Info

Publication number
JPS6417622A
JPS6417622A JP62175238A JP17523887A JPS6417622A JP S6417622 A JPS6417622 A JP S6417622A JP 62175238 A JP62175238 A JP 62175238A JP 17523887 A JP17523887 A JP 17523887A JP S6417622 A JPS6417622 A JP S6417622A
Authority
JP
Japan
Prior art keywords
prism
visual field
prisms
field window
convergence
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
Application number
JP62175238A
Other languages
Japanese (ja)
Other versions
JP2816148B2 (en
Inventor
Nobuyuki Miyake
Toshikazu Matsuda
Fumio Takahashi
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.)
Nikon Corp
Original Assignee
Nikon Corp
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 Nikon Corp filed Critical Nikon Corp
Priority to JP62175238A priority Critical patent/JP2816148B2/en
Publication of JPS6417622A publication Critical patent/JPS6417622A/en
Application granted granted Critical
Publication of JP2816148B2 publication Critical patent/JP2816148B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Eye Examination Apparatus (AREA)

Abstract

PURPOSE:To obtain a convergence apparatus having a simple structure free from the restriction of convergence due to a pupillary distance by eliminating the necessity for inclining a main body, by providing an inverse prism lens before and behind a lens of every kind within a visual field window so as to bend the line of sight of an examinee to the inside. CONSTITUTION:When an eyechart is placed at a distance to perform measurement, the open visual field window 81 of a tarret plate 8 is rotationally inserted in a visual field window 2 and prisms 15a, 16a are rotated at a position where the directions of the prism base bottoms thereof are overlapped in opposite directions and the motors of the respective prisms are rotationally controlled so as to stop at a position becoming zero prism diopter by synthesis. When the eyechart is plated at a short distance B to perform measurement, the turret plate 8 rotates and a prism lens 80 is inserted in the visual field window 2 and fixed in a direction wherein a line of sight is bent to the outside. Members 15, 16 are respectively rotated in opposite directions simultaneously with the rotation of the turret plate 8 and stops at a position where the directions of the base bottoms of the rotary prisms 15a, 16a are inward and the same prism diopter as the prism lens 80 of the turret plate 8 is obtained, by the synthesis of said prisms.
JP62175238A 1987-07-14 1987-07-14 How to use the convergence device of the subjective eye refractive power measurement device when measuring the near point Expired - Fee Related JP2816148B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62175238A JP2816148B2 (en) 1987-07-14 1987-07-14 How to use the convergence device of the subjective eye refractive power measurement device when measuring the near point

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62175238A JP2816148B2 (en) 1987-07-14 1987-07-14 How to use the convergence device of the subjective eye refractive power measurement device when measuring the near point

Publications (2)

Publication Number Publication Date
JPS6417622A true JPS6417622A (en) 1989-01-20
JP2816148B2 JP2816148B2 (en) 1998-10-27

Family

ID=15992675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62175238A Expired - Fee Related JP2816148B2 (en) 1987-07-14 1987-07-14 How to use the convergence device of the subjective eye refractive power measurement device when measuring the near point

Country Status (1)

Country Link
JP (1) JP2816148B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06277180A (en) * 1994-01-17 1994-10-04 Topcon Corp Subjective optometric apparatus
JP2004229789A (en) * 2003-01-29 2004-08-19 Nidek Co Ltd Optometer
JP2014018422A (en) * 2012-07-18 2014-02-03 Topcon Corp Subjective optometer
CN105496350A (en) * 2015-12-01 2016-04-20 重庆远视科技有限公司 Automatic optometry head mirror disc starting control circuit and automatic optometry head initialization method, and vertex power realization method
JP2016182526A (en) * 2016-07-29 2016-10-20 株式会社トプコン Subjective optometer
JP2017060896A (en) * 2017-01-13 2017-03-30 株式会社トプコン Subjective optometer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4888788A (en) * 1972-02-25 1973-11-20
JPS60171031A (en) * 1984-02-15 1985-09-04 キヤノン株式会社 Eyesight meter
JPS61196933A (en) * 1985-02-27 1986-09-01 キヤノン株式会社 Optometer
JPS62295639A (en) * 1986-06-16 1987-12-23 株式会社トプコン Subjective ophthalmoscope

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4888788A (en) * 1972-02-25 1973-11-20
JPS60171031A (en) * 1984-02-15 1985-09-04 キヤノン株式会社 Eyesight meter
JPS61196933A (en) * 1985-02-27 1986-09-01 キヤノン株式会社 Optometer
JPS62295639A (en) * 1986-06-16 1987-12-23 株式会社トプコン Subjective ophthalmoscope

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06277180A (en) * 1994-01-17 1994-10-04 Topcon Corp Subjective optometric apparatus
JP2004229789A (en) * 2003-01-29 2004-08-19 Nidek Co Ltd Optometer
JP2014018422A (en) * 2012-07-18 2014-02-03 Topcon Corp Subjective optometer
CN105496350A (en) * 2015-12-01 2016-04-20 重庆远视科技有限公司 Automatic optometry head mirror disc starting control circuit and automatic optometry head initialization method, and vertex power realization method
JP2016182526A (en) * 2016-07-29 2016-10-20 株式会社トプコン Subjective optometer
JP2017060896A (en) * 2017-01-13 2017-03-30 株式会社トプコン Subjective optometer

Also Published As

Publication number Publication date
JP2816148B2 (en) 1998-10-27

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees