WO2002075368A3 - Replaceable prism for applanation tonometer - Google Patents

Replaceable prism for applanation tonometer Download PDF

Info

Publication number
WO2002075368A3
WO2002075368A3 PCT/US2002/007736 US0207736W WO02075368A3 WO 2002075368 A3 WO2002075368 A3 WO 2002075368A3 US 0207736 W US0207736 W US 0207736W WO 02075368 A3 WO02075368 A3 WO 02075368A3
Authority
WO
WIPO (PCT)
Prior art keywords
prism
light
applanation tonometer
applanation surface
unreflected
Prior art date
Application number
PCT/US2002/007736
Other languages
French (fr)
Other versions
WO2002075368A2 (en
Inventor
Francis Y Falck Jr
Robert W Falck
Original Assignee
Ffhk Dev Company Llc
Francis Y Falck Jr
Robert W Falck
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
Priority claimed from US09/811,709 external-priority patent/US6736778B2/en
Application filed by Ffhk Dev Company Llc, Francis Y Falck Jr, Robert W Falck filed Critical Ffhk Dev Company Llc
Priority to AU2002252345A priority Critical patent/AU2002252345B2/en
Priority to EP02721411A priority patent/EP1377203A4/en
Priority to CA2441513A priority patent/CA2441513C/en
Publication of WO2002075368A2 publication Critical patent/WO2002075368A2/en
Publication of WO2002075368A3 publication Critical patent/WO2002075368A3/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/16—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring intraocular pressure, e.g. tonometers

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Optics & Photonics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

A tonometer (70, 80, 90), preferably for a single use, has an applanation surface (12), an input port (15) arranged to transmit incoming light into the prism, and an output port (16) arranged to transmit outgoing light from the prism. Light entering the input port is directed in an unreflected straight path through the prism to an internal face of the applanation surface. Light internally reflected from the applanation surface proceeds in an unreflected straight path through the prism to the output port.
PCT/US2002/007736 2001-03-19 2002-03-14 Replaceable prism for applanation tonometer WO2002075368A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2002252345A AU2002252345B2 (en) 2001-03-19 2002-03-14 Replaceable prism for applanation tonometer
EP02721411A EP1377203A4 (en) 2001-03-19 2002-03-14 Replaceable prism for applanation tonometer
CA2441513A CA2441513C (en) 2001-03-19 2002-03-14 Replaceable prism for applanation tonometer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/811,709 US6736778B2 (en) 1997-12-22 2001-03-19 Replaceable prism for applanation tonometer
US09/811,709 2001-03-19

Publications (2)

Publication Number Publication Date
WO2002075368A2 WO2002075368A2 (en) 2002-09-26
WO2002075368A3 true WO2002075368A3 (en) 2002-12-19

Family

ID=25207329

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/007736 WO2002075368A2 (en) 2001-03-19 2002-03-14 Replaceable prism for applanation tonometer

Country Status (4)

Country Link
EP (1) EP1377203A4 (en)
AU (1) AU2002252345B2 (en)
CA (1) CA2441513C (en)
WO (1) WO2002075368A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7153267B2 (en) * 2003-01-30 2006-12-26 Francis Y Falck, Jr. Ophthalmologic applanation prism replacement system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5070875A (en) * 1990-11-19 1991-12-10 Falcken, Inc. Applanation tonometer using light reflection to determine applanation area size
US5190042A (en) * 1989-09-22 1993-03-02 Datron-Electronic Gmbh Apparatus for determining intraocular pressure
US5305747A (en) * 1991-02-18 1994-04-26 Clement Clarke International Ltd. Optical elements for applanation tonometers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2643879A1 (en) * 1976-09-29 1978-03-30 Instrumentarium Oy Eye internal pressure measuring prism - has flat side placed on eye and incorporates light intensity detector
US4886066A (en) * 1988-09-13 1989-12-12 See Care Corporation Tonometer having acoustic coupling detection
US6179779B1 (en) * 1997-12-22 2001-01-30 Ffhk Development Company Llc Replaceable prism system for applanation tonometer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5190042A (en) * 1989-09-22 1993-03-02 Datron-Electronic Gmbh Apparatus for determining intraocular pressure
US5070875A (en) * 1990-11-19 1991-12-10 Falcken, Inc. Applanation tonometer using light reflection to determine applanation area size
US5305747A (en) * 1991-02-18 1994-04-26 Clement Clarke International Ltd. Optical elements for applanation tonometers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1377203A4 *

Also Published As

Publication number Publication date
WO2002075368A2 (en) 2002-09-26
AU2002252345B2 (en) 2005-07-14
CA2441513C (en) 2011-05-17
EP1377203A2 (en) 2004-01-07
EP1377203A4 (en) 2007-11-14
CA2441513A1 (en) 2002-09-26

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