JPS648947A - Non-contact type tonometer - Google Patents

Non-contact type tonometer

Info

Publication number
JPS648947A
JPS648947A JP62163678A JP16367887A JPS648947A JP S648947 A JPS648947 A JP S648947A JP 62163678 A JP62163678 A JP 62163678A JP 16367887 A JP16367887 A JP 16367887A JP S648947 A JPS648947 A JP S648947A
Authority
JP
Japan
Prior art keywords
intraocular pressure
pressure value
iop
max
pulse waveform
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
JP62163678A
Other languages
Japanese (ja)
Other versions
JP2612271B2 (en
Inventor
Koji Nishio
Yoshihiko Hanamura
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.)
Topcon Corp
Original Assignee
Topcon 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 Topcon Corp filed Critical Topcon Corp
Priority to JP62163678A priority Critical patent/JP2612271B2/en
Priority to US07/325,944 priority patent/US5092334A/en
Publication of JPS648947A publication Critical patent/JPS648947A/en
Priority to US07/774,313 priority patent/US5183044A/en
Application granted granted Critical
Publication of JP2612271B2 publication Critical patent/JP2612271B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

PURPOSE:To enhance the measuring reliability of intraocular pressure, by calculating one of the max. intraocular pressure value, min. intraocular pressure value and average intraocular value of an eye to be examined in addition to a measured intraocular pressure value. CONSTITUTION:An operation circuit 53 calculates the max. variation width (a) of a pulse waveform PW as the difference between the detected voltages Vmax, Vmin on the basis of the data of the pulse waveform PW of a frame memory 45 and calculates the variation quantity (b) of the pulse waveform PW at the intraocular pressure measuring time tP of an intraocular pressure measured value IOP as the difference between detected voltages Vcp, Vmin at a peak value CP. The min. intraocular pressure value IOPl, the max. intraocular pressure value IOPh and the average intraocular pressure value IOP of an eye E to be examined are calculated from the measured intraocular pressure value IOP, the max. variation width (a) of the pulse waveform PW and the pulse wave variation amount (b) of the pulse waveform PW by operation. For example, the operation circuit 53 is constituted of a microprocessor and operation is processed by software. The values IOPh, IOPl, IOP as the arithmetic result of the operation circuit 53 are outputted to an image processing circuit 47 which in turn allows the intraocular display part of a display device 52 to display the max. intraocular pressure value IOPh, the min. intraocular pressure value IOPl and the average intraocular pressure value IOP, all of which are estimated, along with the measured intraocular pressure value IOP.
JP62163678A 1987-06-30 1987-06-30 Non-contact tonometer Expired - Lifetime JP2612271B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP62163678A JP2612271B2 (en) 1987-06-30 1987-06-30 Non-contact tonometer
US07/325,944 US5092334A (en) 1987-06-30 1988-06-29 Noncontact type tonometer
US07/774,313 US5183044A (en) 1987-06-30 1991-10-10 Noncontact type tonometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62163678A JP2612271B2 (en) 1987-06-30 1987-06-30 Non-contact tonometer

Publications (2)

Publication Number Publication Date
JPS648947A true JPS648947A (en) 1989-01-12
JP2612271B2 JP2612271B2 (en) 1997-05-21

Family

ID=15778518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62163678A Expired - Lifetime JP2612271B2 (en) 1987-06-30 1987-06-30 Non-contact tonometer

Country Status (1)

Country Link
JP (1) JP2612271B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001259461A (en) * 2000-03-23 2001-09-25 Act Giken:Kk Kitchen garbage crush processor
US6563855B1 (en) 1998-06-05 2003-05-13 Shinto Kogyo Kabushiki Kaisha Water jacket of arc furnace
US7101335B2 (en) 2001-02-01 2006-09-05 Nidek Co., Ltd. Non-contact type tonometer
CN111801045A (en) * 2017-09-29 2020-10-20 格拉科斯公司 Intraocular Physiological Sensors

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0642871A (en) * 1992-07-23 1994-02-18 Mitsubishi Heavy Ind Ltd Heat treating apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0642871A (en) * 1992-07-23 1994-02-18 Mitsubishi Heavy Ind Ltd Heat treating apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6563855B1 (en) 1998-06-05 2003-05-13 Shinto Kogyo Kabushiki Kaisha Water jacket of arc furnace
JP2001259461A (en) * 2000-03-23 2001-09-25 Act Giken:Kk Kitchen garbage crush processor
US7101335B2 (en) 2001-02-01 2006-09-05 Nidek Co., Ltd. Non-contact type tonometer
CN111801045A (en) * 2017-09-29 2020-10-20 格拉科斯公司 Intraocular Physiological Sensors
CN111801045B (en) * 2017-09-29 2023-12-05 格拉科斯公司 Intraocular physiological sensor

Also Published As

Publication number Publication date
JP2612271B2 (en) 1997-05-21

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