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WO2008145786A1 - Dispositif permettant d'étudier des rayons et des puissances kératométriques - Google Patents

Dispositif permettant d'étudier des rayons et des puissances kératométriques Download PDF

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Publication number
WO2008145786A1
WO2008145786A1 PCT/ES2008/000373 ES2008000373W WO2008145786A1 WO 2008145786 A1 WO2008145786 A1 WO 2008145786A1 ES 2008000373 W ES2008000373 W ES 2008000373W WO 2008145786 A1 WO2008145786 A1 WO 2008145786A1
Authority
WO
WIPO (PCT)
Prior art keywords
keratometric
radii
simulate
powers
human eye
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.)
Ceased
Application number
PCT/ES2008/000373
Other languages
English (en)
Spanish (es)
Inventor
Ricardo Bernardez Vilaboa
Consuelo Velena Cepeda
Antonio Alvarez Fernandez-Balbuena
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.)
Universidad Complutense de Madrid
Original Assignee
Universidad Complutense de Madrid
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 Universidad Complutense de Madrid filed Critical Universidad Complutense de Madrid
Publication of WO2008145786A1 publication Critical patent/WO2008145786A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • A61B3/0075—Apparatus for testing the eyes; Instruments for examining the eyes provided with adjusting devices, e.g. operated by control lever
    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/28—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine
    • 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
    • A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
    • 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

Definitions

  • the invention falls within the field of Optometry and Optical Technology, more specifically in relation to the measurement of radii and keratometric powers. STATE OF THE TECHNIQUE.
  • Corneal astigmatism is the refractive error that produces a distorted image of a point.
  • keratometry is used, which consists in measuring the radii and powers of the main axes of the cornea.
  • Keratometry is usually performed using manual and automatic keratometers.
  • Manual keratometers are characterized in that the observer must align two images in two specific directions that correspond to the two main axes of eye gaze. These images have specific characteristics to allow the observer to define precisely such axes.
  • Automatic keratometers perform the same measurements with the main infrared help and offer the results on a digital display.
  • the self-refractometer usually includes this measurement system as additional data to which this optical instrument can integrate.
  • US4262966 refers to a contact lens holder with which to hold the lenses without modifying their surfaces and in any position in relation to an optical instrument, so that the parameters of the lenses can be analyzed.
  • This device has a series of elements with the appropriate characteristics so as not to damage the lenses, so that the reflection of the light does not interfere with the analysis to be performed, to protect the lens from contaminants and to align the optical instrument with the axes of the lenses. contact lenses.
  • This invention relates to a device comprising a support of a substantially rigid material, to which one or more elements that simulate the human eye adhere.
  • the material used to manufacture the support can be metallic, plastic, methacrylate, porcelain, glass, wood or any other that confers rigidity to the device and the sheet that forms it has millimeter dimensions.
  • the elements that simulate the human eye they can be of a moldable material with a variable curvature in its main axes, of reflective surface that allows the visualization within the instrument of the images seen of any human eye, and they are placed opposite of the keratometer.
  • a suitable material must be used to have a good optical surface quality. They can be unfinished contact lens pads, attached to the device by the flat surface.
  • pads are cylinders of a variable diameter, between approximately 12 and 16 mm, with a sufficient thickness for polishing in specific machines for handling and subsequent finishing, whose manufacture is standardized. Its usual purpose is its use to generate contact lenses that are very rigid, semi-rigid or hydrophilic, with different chemical compositions of the plastic material according to the end use and the needs of the eye to which they are intended.
  • the simulation necessary for its objective measurement is achieved.
  • artificial eye simulators can be spherical or astigmatic in any power both concave and convex and can be changed in the support by other elements that simulate different characteristics of the human cornea.
  • the power will be adequate to the range of the device to be used.
  • the joining of the elements that simulate the human eye to the support can be done using glue, double-sided adhesive tape or similar materials.
  • a lateral opening in the base of the device allows the support to be attached to an optical instrument using one or more fasteners to muzzle it to the chin guard.
  • the optical instrument to which the support is attached is the chin guard where the keratometer, the self-refractometer or the autokeratometer is installed and the joint system can be as simple as the use of a screw.
  • the new device is useful for all those applications in which it is an advantage to simulate tests of optometry, contactology or ophthalmology without resorting to human eyes. It can be used as an objective evaluation test, with the use of similar surfaces with different values of radii and powers.
  • a diversity of inconveniences for the practice of the technique converge in the formation of future opticians-optometrists such as: the lack of tear that produces image distortion, excess flickering, sudden movements of the patient, disorienting the fixation of the observation area and abrupt movements of the observation apparatus among others.
  • the use of the device of the present invention prevents a considerable delay in the practice of keratometric equipment since it eliminates 75% of these problems.
  • This new tool by eliminating the need to learn in human eyes, favors the precision and exercise of the measurement, reducing teaching time. That way we reduce the number of practices without varying the difficulty of the test.
  • Figure 1 Device for studying radii and keratometric powers with:
  • Part A base (1) of attachment to the chin guard of the optical instrument that includes a hole (7), a hole with thread (2), and the slot (3) where part B will be embedded.
  • Part B Support that has three sections. The first section (4) serves to join the support to the base, the second section (5) serves to approximate the device to the optical instrument and the third section (6) has the parts C attached.
  • Figure 2 Artificial eye simulator.
  • the support of metallic material, duralumin in this example, is represented in Figure 1.
  • the support (B) was made with three sections: a front (6) of a length of 50 mm, where the tablets or lenses were attached (C ); then a first bend was made, to bring the optical instrument closer to the lenses (C), giving rise to a second section (5) with a length of 40 mm long and with an inclination of 23.2 mm that lengthened the support (B); finally, a second fold was extended with a third section of 11.9 mm (4), parallel to the front (6) and increasing the length of the support (B), which was embedded in a slit drilled laterally 5 mm (3) in the base (A) that is attached to the chin guard of the optical instrument, for coupling to the chin guard of the manual keratometer.
  • the dimensions of the base, or piece A were 25 mm high, 32 mm wide with two side lengths of 28 mm and 15 mm, this last section was drawn with an inclined plane so that the device remained perpendicular to the cylindrical bar of the chin guard where it was fastened, with a screw tightened in the thread made for the purpose (2) that was facing the inclined plane.
  • the hole drilled had a diameter of 16 mm (7) and was made at the opening of the base (A).
  • the base (A) incorporated an M5 drill with thread (2) for the screw that held it against the chin guard 10.6 mm from the edge.
  • the third section of the support (4) was embedded in the groove (3) at 12.5 mm in height and at 13.5 mm in width of the base (A), respectively, where it was welded.
  • the thickness of the metal sheet that formed it was 1 mm thick.
  • the tablets or lenses (part C) were made of polyvinyl methacrylate simulating an astigmatic artificial eye. In different tests, they were glued with extra strong glue or double-sided adhesive tape to the base (A) so that their mechanical axis and perpendicularity were maintained for a good adjustment of the axis in astigmatism.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • General Physics & Mathematics (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biophysics (AREA)
  • Surgery (AREA)
  • Molecular Biology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Ophthalmology & Optometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Theoretical Computer Science (AREA)
  • Pure & Applied Mathematics (AREA)
  • Signal Processing (AREA)
  • Mathematical Physics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Algebra (AREA)
  • Medicinal Chemistry (AREA)
  • Educational Technology (AREA)
  • Educational Administration (AREA)
  • Business, Economics & Management (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

L'invention concerne un dispositif permettant d'étudier des rayons et des puissances kératométriques. Le dispositif placé dans un instrument optique, permet de simuler des essais d'optométrie, de contactologie ou d'ophtalmologie sans recourir à l'oeil humain. Il permet aussi d'étalonner l'instrument sous forme d'essai objectif d'évaluation. Ce dispositif comprend une base (partie A) avec une fente (3) qui assujetti un support (pièce B) avec un plan incliné de sorte que le dispositif se maintienne perpendiculairement à la barre quand il y est assujetti. Sur le support (B) on colle des simulateurs de l'oeil humain (pièce C) conçus pour simuler un astigmatisme kératométrique dans la plage d'une cornée humaine. Le dispositif se raccorde à un instrument optique via la partie A, laquelle possède un trou traversant (7) et un boulon dans le filet prévu à cet effet (2)
PCT/ES2008/000373 2007-06-01 2008-05-27 Dispositif permettant d'étudier des rayons et des puissances kératométriques Ceased WO2008145786A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200701514A ES2310128B2 (es) 2007-06-01 2007-06-01 Dispositivo para el estudio de radios y potencias queratometricas.
ESP200701514 2007-06-01

Publications (1)

Publication Number Publication Date
WO2008145786A1 true WO2008145786A1 (fr) 2008-12-04

Family

ID=40074602

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2008/000373 Ceased WO2008145786A1 (fr) 2007-06-01 2008-05-27 Dispositif permettant d'étudier des rayons et des puissances kératométriques

Country Status (2)

Country Link
ES (1) ES2310128B2 (fr)
WO (1) WO2008145786A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10219687B2 (en) 2014-11-07 2019-03-05 Ohio State Innovation Foundation Methods and apparatus for making a determination about an eye in ambient lighting conditions
US11622682B2 (en) 2019-12-27 2023-04-11 Ohio State Innovation Foundation Methods and apparatus for making a determination about an eye using color temperature adjusted ambient lighting
US11969212B2 (en) 2019-12-27 2024-04-30 Ohio State Innovation Foundation Methods and apparatus for detecting a presence and severity of a cataract in ambient lighting

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972602A (en) * 1974-08-01 1976-08-03 Precision-Cosmet Company, Inc. Auxiliary lens holder device for use with a keratometer
US4232966A (en) * 1979-06-12 1980-11-11 Laco Laboratories, Inc. Contact lens device
US4496242A (en) * 1981-12-22 1985-01-29 Automated Optics, Inc. Apparatus for positioning a contact lens under a radiuscope
US4786144A (en) * 1987-01-22 1988-11-22 Epstein Arthur B Contact lens holder
US4815846A (en) * 1986-01-08 1989-03-28 Michael Wodis Toric soft contact lens holder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972602A (en) * 1974-08-01 1976-08-03 Precision-Cosmet Company, Inc. Auxiliary lens holder device for use with a keratometer
US4232966A (en) * 1979-06-12 1980-11-11 Laco Laboratories, Inc. Contact lens device
US4496242A (en) * 1981-12-22 1985-01-29 Automated Optics, Inc. Apparatus for positioning a contact lens under a radiuscope
US4815846A (en) * 1986-01-08 1989-03-28 Michael Wodis Toric soft contact lens holder
US4786144A (en) * 1987-01-22 1988-11-22 Epstein Arthur B Contact lens holder

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10219687B2 (en) 2014-11-07 2019-03-05 Ohio State Innovation Foundation Methods and apparatus for making a determination about an eye in ambient lighting conditions
US10986991B2 (en) 2014-11-07 2021-04-27 Ohio State Innovation Foundation Methods and apparatus for making a determination about an eye in ambient lighting conditions
US11642017B2 (en) 2014-11-07 2023-05-09 Ohio State Innovation Foundation Methods and apparatus for making a determination about an eye in ambient lighting conditions
US11622682B2 (en) 2019-12-27 2023-04-11 Ohio State Innovation Foundation Methods and apparatus for making a determination about an eye using color temperature adjusted ambient lighting
US11969210B2 (en) 2019-12-27 2024-04-30 Ohio State Innovation Foundation Methods and apparatus for making a determination about an eye using color temperature adjusted lighting
US11969212B2 (en) 2019-12-27 2024-04-30 Ohio State Innovation Foundation Methods and apparatus for detecting a presence and severity of a cataract in ambient lighting

Also Published As

Publication number Publication date
ES2310128A1 (es) 2008-12-16
ES2310128B2 (es) 2009-10-01

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