JPS648947A - Non-contact type tonometer - Google Patents
Non-contact type tonometerInfo
- 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
Links
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.
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)
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 sensor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0642871A (en) * | 1992-07-23 | 1994-02-18 | Mitsubishi Heavy Ind Ltd | Heat treating apparatus |
-
1987
- 1987-06-30 JP JP62163678A patent/JP2612271B2/en not_active Expired - Lifetime
Patent Citations (1)
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)
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 sensor |
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080227 Year of fee payment: 11 |