BR0014497A - Corneal reconformation of elongated shape - Google Patents

Corneal reconformation of elongated shape

Info

Publication number
BR0014497A
BR0014497A BR0014497-5A BR0014497A BR0014497A BR 0014497 A BR0014497 A BR 0014497A BR 0014497 A BR0014497 A BR 0014497A BR 0014497 A BR0014497 A BR 0014497A
Authority
BR
Brazil
Prior art keywords
spherical
reconformation
freedom
corneal
elongated
Prior art date
Application number
BR0014497-5A
Other languages
Portuguese (pt)
Inventor
Jack T Holladay
Michael Smith
Travis Terry
Lance Marrou
Original Assignee
Lasersight Tech Inc
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 Lasersight Tech Inc filed Critical Lasersight Tech Inc
Priority claimed from PCT/US2000/027425 external-priority patent/WO2001024728A2/en
Priority claimed from US09/679,077 external-priority patent/US6610048B1/en
Publication of BR0014497A publication Critical patent/BR0014497A/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • 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
    • A61B3/0016—Operational features thereof
    • A61B3/0025—Operational features thereof characterised by electronic signal processing, e.g. eye models
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F9/00802—Methods or devices for eye surgery using laser for photoablation
    • A61F9/00804—Refractive treatments
    • 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
    • A61B3/107—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining the shape or measuring the curvature of the cornea
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00861—Methods or devices for eye surgery using laser adapted for treatment at a particular location
    • A61F2009/00872—Cornea
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00878—Planning
    • A61F2009/00882—Planning based on topography

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Vascular Medicine (AREA)
  • Optics & Photonics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Signal Processing (AREA)
  • Biophysics (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Laser Surgery Devices (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

Patente de Invenção: "RECONFORMAçãO CORNEANA DE FORMATO ALONGADO". Aparelho e técnicas para a realização de uma reconformação corneana de formato alongado. De acordo com as técnicas, um sistema a laser de varredura de ablação inclui módulos de filtro a fim de ajustar os dados de medição refrativos ou topográficos de entrada a um modelo elipsólde de três (3) variáveis. Isto provê as aproximações pré e pós operatórias de uma córnea. Um perfil de formato alongado desejado é determinado com base em um formato elipsoidal alongado desejado. De acordo com os princípios da presente invenção, o modelo elipsóide esfero-equivalente tem apenas três graus de liberdade (não quatro com uma técnica bicónica convencional) para definir um perfil de ablação desejado, provendo uma correção de visão extremamente precisa e previsível, de longo prazo. Para se chegar a um modelo elipsóide tendo apenas três números de liberdade, um valor esfero-equivalente (SEQ) de esfericidade Q~ SEQ~ é gerado. O valor de excentricidade esfero-equivalente QSEQ substitui dois graus de liberdade (isto é, de excentricidades) em um sistema de modelagem bicónico de outra forma convencional, deixando apenas três (3) variáveis a fim de se determinar um melhor ajuste elipsóide a uma superfície corneana, possibilitar uma modelagem elipsoidal alongada precisa de uma córnea, e limitar os resultados a um astigmatismo regular que pode ser corrigido com esfero-cilindros óticos.Invention Patent: "CORONAN RECONFORMATION OF LONG FORMAT". Apparatus and techniques for carrying out an elongated corneal reconformation. According to the techniques, a laser ablation scanning system includes filter modules in order to adjust the refractive or topographic measurement data input to a three (3) variable ellipsoid model. This provides pre- and post-operative approaches to a cornea. A desired elongated shape profile is determined based on a desired ellipsoidal elongated shape. According to the principles of the present invention, the spherical-equivalent ellipsoid model has only three degrees of freedom (not four with a conventional biconic technique) to define a desired ablation profile, providing an extremely accurate and predictable, long-term vision correction. term. In order to arrive at an ellipsoid model having only three freedom numbers, a spherical equivalent value (SEQ) of sphericity Q ~ SEQ ~ is generated. The spherical-equivalent eccentricity value QSEQ replaces two degrees of freedom (ie, eccentricities) in an otherwise conventional biconic modeling system, leaving only three (3) variables in order to determine a better ellipsoid fit to a surface corneal, enable elongated ellipsoidal modeling that needs a cornea, and limit the results to regular astigmatism that can be corrected with optical spherical cylinders.

BR0014497-5A 1999-10-05 2000-10-05 Corneal reconformation of elongated shape BR0014497A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US15780399P 1999-10-05 1999-10-05
US22372800P 2000-08-08 2000-08-08
PCT/US2000/027425 WO2001024728A2 (en) 1999-10-05 2000-10-05 Prolate shaped corneal reshaping
US09/679,077 US6610048B1 (en) 1999-10-05 2000-10-05 Prolate shaped corneal reshaping

Publications (1)

Publication Number Publication Date
BR0014497A true BR0014497A (en) 2002-06-11

Family

ID=27388070

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0014497-5A BR0014497A (en) 1999-10-05 2000-10-05 Corneal reconformation of elongated shape

Country Status (2)

Country Link
EP (1) EP1265544A4 (en)
BR (1) BR0014497A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4710193A (en) * 1986-08-18 1987-12-01 David Volk Accommodating intraocular lens and lens series and method of lens selection
US5807381A (en) * 1995-10-18 1998-09-15 Scientific Optics, Inc. Method and apparatus for improving vision
DE19752595C1 (en) * 1997-11-27 1999-07-15 Firouz Alavi Arrangement for determining a number of parameters of a curved surface, esp. a cornea surface

Also Published As

Publication number Publication date
EP1265544A4 (en) 2003-08-06
EP1265544A2 (en) 2002-12-18

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Legal Events

Date Code Title Description
B11A Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]