CA2441513C - Prisme amovible pour tonometre par aplanation - Google Patents

Prisme amovible pour tonometre par aplanation Download PDF

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Publication number
CA2441513C
CA2441513C CA2441513A CA2441513A CA2441513C CA 2441513 C CA2441513 C CA 2441513C CA 2441513 A CA2441513 A CA 2441513A CA 2441513 A CA2441513 A CA 2441513A CA 2441513 C CA2441513 C CA 2441513C
Authority
CA
Canada
Prior art keywords
prism
applanation surface
light
applanation
tonometer
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.)
Expired - Lifetime
Application number
CA2441513A
Other languages
English (en)
Other versions
CA2441513A1 (fr
Inventor
Francis Y. Falck, Jr.
Robert W. Falck
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.)
FFHK Dev Co LLC
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2441513A1 publication Critical patent/CA2441513A1/fr
Application granted granted Critical
Publication of CA2441513C publication Critical patent/CA2441513C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Abstract

L'invention concerne un prisme de tonomètre, de préférence à usage unique, présentant une surface d'aplanation, un port d'entrée adapté pour l'émission d'une lumière incidente sur le prisme, et un port de sortie adapté pour l'émission d'une lumière de sortie sortant du prisme. La lumière entrant dans le port d'entrée est dirigée selon une trajectoire rectiligne non réfléchie à travers le prisme sur une face interne de la surface d'aplanation. La lumière réfléchie intérieurement provenant de la surface d'aplanation, suit une trajectoire rectiligne non réfléchie à travers le prisme jusqu'au port de sortie.
CA2441513A 2001-03-19 2002-03-14 Prisme amovible pour tonometre par aplanation Expired - Lifetime CA2441513C (fr)

Applications Claiming Priority (3)

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
PCT/US2002/007736 WO2002075368A2 (fr) 2001-03-19 2002-03-14 Prisme amovible pour tonometre par aplanation

Publications (2)

Publication Number Publication Date
CA2441513A1 CA2441513A1 (fr) 2002-09-26
CA2441513C true CA2441513C (fr) 2011-05-17

Family

ID=25207329

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2441513A Expired - Lifetime CA2441513C (fr) 2001-03-19 2002-03-14 Prisme amovible pour tonometre par aplanation

Country Status (4)

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

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

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2643879A1 (de) * 1976-09-29 1978-03-30 Instrumentarium Oy Verfahren und vorrichtung zum messen des augeninnendruckes
US4886066A (en) * 1988-09-13 1989-12-12 See Care Corporation Tonometer having acoustic coupling detection
DE3931630A1 (de) * 1989-09-22 1991-05-08 Datron Electronic Gmbh Verfahren und vorrichtung zur bestimmung des augeninnendrucks o. dgl.
US5070875A (en) * 1990-11-19 1991-12-10 Falcken, Inc. Applanation tonometer using light reflection to determine applanation area size
GB9103360D0 (en) * 1991-02-18 1991-04-03 Clement Clarke Int Improvements relating to applanation tonometers
US6179779B1 (en) * 1997-12-22 2001-01-30 Ffhk Development Company Llc Replaceable prism system for applanation tonometer

Also Published As

Publication number Publication date
EP1377203A2 (fr) 2004-01-07
CA2441513A1 (fr) 2002-09-26
EP1377203A4 (fr) 2007-11-14
AU2002252345B2 (en) 2005-07-14
WO2002075368A2 (fr) 2002-09-26
WO2002075368A3 (fr) 2002-12-19

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20220314