Title:
NONCONTACT TONOMETER
Document Type and Number:
Japanese Patent JP3885015
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a noncontact tonometer for easily determining whether or not intraocular pressure is normally measured.
SOLUTION: When measuring the intraocular pressure in a Step S1, intake processing of a pressure signal and a light receiving signal is performed in a Step S2. When determining that a measured value is obtained in a Step S3, the Step is transferred to a Step S4, and an intraocular pressure value is displayed on a monitor. When determining that the measured value is not obtained, processing for transferring an image to a memory area is performed in a Step S5. A Step S6 determines whether or not a corneal luminescent spot is extracted, and when the spot is not extracted, extraction of the luminescent spot is confirmed from an image preceding by one. When determining that there is a blink, the Step is transferred to a Step S7. The Step S7 displays a BLINK error by generating and mixing a BLK character in a real-time picture signal.
Inventors:
Koji Uchida
Application Number:
JP2002270351A
Publication Date:
February 21, 2007
Filing Date:
September 17, 2002
Export Citation:
Assignee:
Canon Inc
International Classes:
A61B3/16; (IPC1-7): A61B3/16
Domestic Patent References:
| JP7171113A | ||||
| JP6142051A | ||||
| JP2002248078A | ||||
| JP10014884A | ||||
| JP62240024A | ||||
| JP2002262284A | ||||
| JP3108261B2 | ||||
| JP8126611A | ||||
| JP3085136A |
Foreign References:
| US3585849 |
Attorney, Agent or Firm:
Yasuhiko Hibiya
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