WO2008145786A1 - Dispositif permettant d'étudier des rayons et des puissances kératométriques - Google Patents
Dispositif permettant d'étudier des rayons et des puissances kératométriques Download PDFInfo
- 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
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 6
- 201000009310 astigmatism Diseases 0.000 abstract description 5
- 210000004087 cornea Anatomy 0.000 abstract description 4
- 238000004164 analytical calibration Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 208000014733 refractive error Diseases 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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)
- Biophysics (AREA)
- General Physics & Mathematics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Ophthalmology & Optometry (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Molecular Biology (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Algebra (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Signal Processing (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)
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 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)
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)
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 |
-
2007
- 2007-06-01 ES ES200701514A patent/ES2310128B2/es active Active
-
2008
- 2008-05-27 WO PCT/ES2008/000373 patent/WO2008145786A1/fr active Application Filing
Patent Citations (5)
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)
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 |
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 |
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 |
Also Published As
Publication number | Publication date |
---|---|
ES2310128A1 (es) | 2008-12-16 |
ES2310128B2 (es) | 2009-10-01 |
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