WO2008145786A1 - Device for studying keratometric power values and radii - Google Patents

Device for studying keratometric power values and radii 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
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keratometric
radii
simulate
powers
human eye
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PCT/ES2008/000373
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Spanish (es)
French (fr)
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Ricardo Bernardez Vilaboa
Consuelo Velena Cepeda
Antonio Alvarez Fernandez-Balbuena
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Universidad Complutense De Madrid
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Publication of WO2008145786A1 publication Critical patent/WO2008145786A1/en

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    • 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.

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Abstract

The invention relates to a device for studying keratometric power values and radii. The device is disposed in an optical instrument and can be used to simulate optometry, contactology and ophthalmology tests without using a human eye. The invention can also be used for instrument calibration for objective testing. The device includes a base (portion A) with a notch (3) for securing a supporting part (part B) having an inclined plane which ensures that the device is maintained perpendicular to the bar to which it is secured. Human eye simulators (part C) are affixed on top of the supporting part (B) and said simulators are designed to simulate a keratometric astigmatism in the range of the human cornea. The device is joined to an optical instrument by means of portion A which is provided with a hole (7) and a screw in the thread (2) provided for this purpose.

Description

TITULO TITLE
Dispositivo para el estudio de radios y potencias queratométricas SECTOR DE LA TÉCNICADevice for the study of radii and keratometric powers SECTOR OF THE TECHNIQUE
La invención se encuadra en el sector de la Optometría y la Tecnología Óptica, más concretamente en lo relativo a la medición de radios y potencias queratométricas. ESTADO DE LA TÉCNICA.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.
El astigmatismo corneal es el error refractivo que produce una imagen distorsionada de un punto. En Optometría, para medir el astigmatismo corneal con el objetivo de corregirlo por medio de lentes tóricas, se utiliza la queratometría que consiste en la medida de los radios y potencias de los ejes principales de la cornea.Corneal astigmatism is the refractive error that produces a distorted image of a point. In Optometry, to measure corneal astigmatism in order to correct it by means of toric lenses, keratometry is used, which consists in measuring the radii and powers of the main axes of the cornea.
Habitualmente la queratometría se realiza utilizando queratómetros manuales y automáticos. Los queratómetros manuales se caracterizan porque el observador debe alinear dos imágenes en dos direcciones concretas que corresponden a los dos ejes principales de mirada del ojo. Estas imágenes reúnen unas características específicas para permitir al observador definir con precisión tales ejes. Los queratómetros automáticos realizan las mismas medidas con la ayuda principal de infrarrojos y ofrecen los resultados en una pantalla digital. Existen queratómetros automáticos o autoqueratómetros que realizan las mismas medidas que los queratómetros manuales pero de forma más rápida, utilizando un disparo efectuado por el profesional en base a una imagen nítida que percibe en el visor. El autorrefractómetro, por otro lado, suele incluir este sistema de medida como un dato adicional a los que pueda integrar este instrumento óptico.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. There are automatic keratometers or autokeratometers that perform the same measurements as manual keratometers but more quickly, using a shot made by the professional based on a clear image perceived in the viewfinder. The self-refractometer, on the other hand, usually includes this measurement system as additional data to which this optical instrument can integrate.
Relacionadas con dispositivos que incluyen soportes adaptables a los instrumentos ópticos existen algunas invenciones especialmente preocupadas por conseguir medir los parámetros de lentes de contacto sin modificar las paredes o los bordes de dichas lentes. En este sentido la patente US4262966 se refiere a un soporte de lentes de contacto con el que sostener las lentes sin modificar sus superficies y en cualquier posición en relación con un instrumento óptico, de manera que se puedan analizar los parámetros de las lentes. Este dispositivo tiene una serie de elementos con las características adecuadas para que no dañe las lentes, para que la reflexión de la luz no interfiera en los análisis a realizar, para proteger la lente de contaminantes y para alinear el instrumento óptico con los ejes de las lentes de contacto. Otro dispositivo más sencillo se presenta en la patente US4786144 que se refiere a un soporte para lentillas con distintos accesorios en función del tipo de lente que se desea estudiar (hidrofílicas o rígidas) y que se puede unir a otro soporte de manera que se mantenga ante el aparato de medición. También se conocen lentes de material plástico pegadas en el oclusor del equipo óptico para el calibrado de los queratómetros manuales o, en su defecto, una bola metálica esférica sobre soporte vertical en mentonera. Las pastillas de material orgánico utilizadas para el calibrado convencional del aparato queratométrico son esféricas y de potencias y radios iguales en todas las direcciones. Además, en la actualidad es conocido el empleo de dispositivos de superficie esférica para el calibrado de aparatos de optometría, como los oclusores de los queratómetros convencionales. Entre estos dispositivos pueden encontrarse bolas de acero que algunas casas comerciales suministran junto con los aparatos de optometría para su calibrado. Related to devices that include adaptable media to optical instruments, there are some inventions that are especially concerned with measuring contact lens parameters without modifying the walls or edges of said lenses. In this sense, 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. Another simpler device is presented in US4786144 which refers to a lens holder with different accessories depending on the type of lens that is to be studied (hydrophilic or rigid) and that can be attached to another support so that it is maintained before The measuring device. Also known are plastic lenses attached to the occluder of the optical equipment for the calibration of manual keratometers or, failing that, a spherical metal ball on a vertical chin rest. The organic material pads used for conventional device calibration Keratometric are spherical and of equal powers and radii in all directions. In addition, the use of spherical surface devices for the calibration of optometry devices, such as occluders of conventional keratometers, is currently known. These devices may include steel balls that some commercial houses supply together with the optometry devices for calibration.
DESCRIPCIÓN DE LA INVENCIÓNDESCRIPTION OF THE INVENTION
Esta invención se refiere a un dispositivo que comprende un soporte de un material sensiblemente rígido, al que se le adhieren uno o más elementos que simulan el ojo humano. El material utilizado para fabricar el soporte puede ser metálico, plástico, metacrilato, porcelana, cristal, madera o cualquier otro que confiera rigidez al dispositivo y la lámina que lo conforma tiene dimensiones milimétricas. En cuanto a los elementos que simulan el ojo humano, pueden ser de un material moldeable con una curvatura variable en sus ejes principales, de superficie reflejante que permita la visualización dentro del instrumento de las imágenes vistas de un ojo humano cualquiera, y se colocan enfrente del queratómetro. Además, se debe utilizar un material adecuado para tener una buena calidad óptica de la superficie. Pueden ser pastillas de lentes de contacto sin acabar, adheridas al dispositivo por la superficie plana. Estas pastillas son cilindros de un diámetro variable, entre 12 y 16 mm aproximadamente, con un grosor suficiente para su pulido en máquinas específicas para su manipulación y posterior acabado, cuya fabricación está normalizada. Su finalidad habitual es su uso para generar lentes de contacto bien rígidas, semirrígidas o hidrofüicas, con diferentes composiciones químicas del material plástico según el uso final y las necesidades del ojo al que van destinadas. En esta invención, dado que el ojo humano tiene diferentes valores en la superficie corneal anterior, utilizando pastillas con radios y potencias diferentes más cercanas al ojo se consigue la simulación necesaria para su medida objetiva. Por lo tanto, sea cual sea el elemento que se utilice para simular el ojo humano, el diseño se realiza de manera que simule un astigmatismo queratométrico en el rango que tiene una córnea humana y así los simuladores de ojo artificial pueden ser esféricos o astigmáticos en cualquier potencia tanto cóncavos como convexos y se pueden cambiar en el soporte por otros elementos que simulen distintas características de la córnea humana. La potencia será la adecuada al rango del aparato que se vaya a utilizar. La unión de los elementos que simulan el ojo humano al soporte se puede realizar mediante pegamento, cinta adhesiva de doble cara o materiales similares.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. As for 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. In addition, 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. These 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. In this invention, since the human eye has different values on the anterior corneal surface, using tablets with different radii and powers closer to the eye, the simulation necessary for its objective measurement is achieved. Therefore, whatever element is used to simulate the human eye, the design is performed in a way that simulates a keratometric astigmatism in the range that a human cornea has and thus 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.
Una abertura lateral en la base del dispositivo permite acoplar el soporte a un instrumento óptico utilizando uno o varios elementos de sujeción para amordazarlo a la mentonera. El instrumento óptico al que se acopla el soporte es la mentonera donde va instalado el queratómetro, el autorrefractómetro o el autoqueratómetro y el sistema de unión puede ser tan sencillo como el empleo de un tornillo.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.
El nuevo dispositivo es útil para todas aquellas aplicaciones en las que sea una ventaja simular pruebas de optometría, contactología u oftalmología sin recurrir a los ojos humanos. Se puede utilizar como prueba objetiva de evaluación, con el uso de superficies similares con diferentes valores de radios y potencias. Por ejemplo, en la queratometría sobre ojo humano, confluyen una diversidad de inconvenientes para la práctica de la técnica en la formación de futuros ópticosoptometristas como son: la falta de lágrima que produce distorsión de la imagen, el exceso de parpadeo, los movimientos bruscos del paciente, desorientando la fijación del área de observación y los movimientos bruscos del aparato de observación entre otros. El uso del dispositivo de la presente invención evita un retraso considerable en la práctica de equipos queratométricos puesto que elimina el 75% de estos problemas.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. For example, in keratometry on the human eye, 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.
Esta nueva herramienta, al eliminar la necesidad de aprender en ojos humanos, favorece la precisión y ejercicio de la medida, disminuyendo el tiempo de enseñanza. De esa forma reducimos el número de prácticas sin variar la dificultad de la prueba. 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.
DESCRIPCIÓN DE LAS FIGURASDESCRIPTION OF THE FIGURES
A continuación, se describen los dibujos explicativos que se acompañan a la presente invención.The explanatory drawings accompanying the present invention are described below.
Figura 1 : Dispositivo para estudio de radios y potencias queratométricas con:Figure 1: Device for studying radii and keratometric powers with:
• Parte A: base (1) de unión a la mentonera del instrumento óptico que incluye un agujero horadado (7), un taladro con rosca (2), y la hendidura (3) donde irá incrustada la parte B.• 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.
• Parte B: Soporte que tiene tres tramos. El primer tramo (4) sirve para unir el soporte a la base, el segundo tramo (5) sirve para aproximar el dispositivo al instrumento óptico y el tercer tramo (6) lleva unidas las partes C.• 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.
• Parte C: Simuladores de ojo artificial.• Part C: Artificial eye simulators.
Figura 2: Simulador de ojo artificial. Figure 2: Artificial eye simulator.
MODO DE REALIZACIÓN DE LA INVENCIÓNEMBODIMENT OF THE INVENTION
La presente invención se ilustra adicionalmente mediante el siguiente ejemplo, que no pretende ser limitativo de su alcance.The present invention is further illustrated by the following example, which is not intended to limit its scope.
El soporte de material metálico, duraluminio en este ejemplo, está representado en la figura 1. El soporte (B) se realizó con tres tramos: un frente (6) de una longitud de 50 mm, donde se pegaron las pastillas o lentes (C); a continuación se realizó un primer doblez, para acercar el instrumento óptico a las lentes (C), dando lugar a un segundo tramo (5) con una longitud de 40 mm de largo y con una inclinación de 23,2 mm que alargaba el soporte (B); finalmente, un segundo doblez se prolongó con un tercer tramo de 11,9 mm (4), paralelo al frente (6) y aumentando la longitud del soporte (B), que se incrustó en una hendidura horadada lateralmente 5 mm (3) en la base (A) que va sujeta a la mentonera del instrumento óptico, para su acoplamiento en la mentonera del queratómetro manual.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.
Las dimensiones de la base, o pieza A, fueron de 25 mm de alto, 32 mm de ancho con dos longitudes laterales de 28 mm y 15 mm, este último tramo se trazó con un plano inclinado para que el dispositivo se mantuviera perpendicular a la barra cilindrica de la mentonera donde se sujetaba, con un tornillo apretado en la rosca hecha al efecto (2) que se encontraba enfrentada al plano inclinado.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.
El agujero horadado tenía un diámetro de 16 mm (7) y se hizo en la apertura de la base (A). La base (A) incorporaba un taladro M5 con rosca (2) para el tornillo que la sujetaba contra la mentonera a 10,6 mm del borde.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.
El tercer tramo del soporte (4) se incrustó en la hendidura (3) a 12,5 mm en altura y a 13,5 mm de ancho de la base (A), respectivamente, donde se soldó. El grosor de la lámina metálica que lo formaba tenía un espesor de 1 mm.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.
Las pastillas o lentes (pieza C) se fabricaron en polivinilmetacrilato simulando un ojo artificial astigmático. En distintos ensayos realizados, se pegaron con pegamento extra fuerte o cinta adhesiva de doble cara a la base (A) de manera que se mantenía su eje mecánico y su perpendicularidad para un buen ajuste del eje en el astigmatismo. 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.

Claims

REIVINDICACIONES
1. Dispositivo para el estudio de radios y potencias queratométricas que comprende: - una base (A) de sujeción a la mentonera de un instrumento óptico;1. Device for the study of radii and keratometric powers comprising: - a base (A) for attaching to the chin guard of an optical instrument;
- un soporte (B) de material sensiblemente rígido y perpendicular a la barra de la mentonera del instrumento óptico; - uno o más elementos (C) que simulan el ojo humano, unidos al soporte, que se pueden cambiar por otros elementos que simulen distintas características del ojo humano.- a support (B) of material substantially rigid and perpendicular to the chin bar of the optical instrument; - one or more elements (C) that simulate the human eye, attached to the support, which can be exchanged for other elements that simulate different characteristics of the human eye.
2. Dispositivo para el estudio de radios y potencias queratométricas según la reivindicación 1 en el que el soporte (B) tiene dos dobleces que acercan al instrumento óptico el frente (6) al que se unen los elementos (C) que simulan el ojo humano, para que la distancia de enfoque del instrumento sea correcta.2. Device for the study of radii and keratometric powers according to claim 1 wherein the support (B) has two folds that bring the front (6) to which the elements (C) that simulate the human eye are attached to the optical instrument , so that the focus distance of the instrument is correct.
3. Dispositivo para el estudio de radios y potencias queratométricas según las reivindicaciones 1 ó 2 cuyas medidas son las adecuadas para su instalación universal en todos los queratómetros convencionales.3. Device for the study of radii and keratometric powers according to claims 1 or 2 whose measurements are suitable for universal installation in all conventional keratometers.
4. Uso del dispositivo para el estudio de radios y potencias queratométricas en el aprendizaje de la toma de medidas queratométricas.4. Use of the device for the study of radii and keratometric powers in learning to take keratometric measurements.
5. Uso del dispositivo para el estudio de radios y potencias queratométricas en la calibración de queratómetros e instrumentos ópticos. 5. Use of the device for the study of radii and keratometric powers in the calibration of keratometers and optical instruments.
PCT/ES2008/000373 2007-06-01 2008-05-27 Device for studying keratometric power values and radii WO2008145786A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200701514A ES2310128B2 (en) 2007-06-01 2007-06-01 DEVICE FOR THE STUDY OF RADIOS AND CHERATOMETRIC POWERS.
ESP200701514 2007-06-01

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WO2008145786A1 true WO2008145786A1 (en) 2008-12-04

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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

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Publication number Publication date
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ES2310128B2 (en) 2009-10-01

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