Abstract:
PROBLEM TO BE SOLVED: To provide a method and an apparatus for objectively measuring aberration of an optical system by wavefront analysis. SOLUTION: A method for enhancing vision of an eye includes a laser supply device having a laser beam for ablating corneal material from the cornea of the eye. Measurements are made to determine an optical path difference between a plane wave and a wavefront emanating from the retina of the eye for a location at a surface of the cornea. An optical correction is provided to the laser delivery system for the location based on the optical path difference and refractive indices of media through which the wavefront passes. The optical correction includes dividing the optical path difference by a difference between an index of refraction of corneal material and an index of refraction of air. The laser beam is directed to the location on the surface of the cornea and corneal material ablated at the location in response to the optical correction to cause the wavefront to approximate the shape of the plane wave at that location. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
A range of a wavefront sensor is extended by focusing collimated light onto a lenslet array, an output creating a grid formed by edges of the lenslets and a reference spot in the members of the grid. Each reference spot has a known relationship to the grid member and a centroid. A relationship between the reference centroids is determined. Next a wavefront emanating from an eye is focused onto the lenslet array, with the output from the lenslet array forming the grid and aberrated eye spots thereon, each eye spot having a centroid. A relationship between the eye spot centroids is determined. One known relationship between one reference centroid and the centroid of one eye spot is identified. Finally, at least some of the remaining relationships between the reference centroids and the eye spot centroids are determined. The determined relationships provide a measure indicative of the eye aberration.
Abstract:
An automated, objective method using a fixation target (14) for determining the accommodative range and aberration profile of an eye using a wavefront sensor (28) that iteratively determines the change in accommodation of the lens of an eye (12).
Abstract:
A system and method for objective measurement and correction of focusing optical systems comprising optics disposed in the path of the beam (18) which directs the beam through the focusing optical system, e.g., and eye (120) and focuses the beam at its rear portion (122). The beam is diffusely reflected back and a wavefront analyzer (26) is disposed in the path of the wavefront projected from the optics and calculates the distortions as an estimate of aberrations of the focusing optical system.
Abstract:
A range of a wavefront sensor is extended by focusing collimated light onto a lenslet array, an output creating a grid formed by edges of the lenslets and a reference spot in the members of the grid. Each reference spot has a known relationship to the grid member and a centroid. A relationship between the reference centroids is determined. Next a wavefront emanating from an eye is focused onto the lenslet array, with the output from the lenslet array forming the grid and aberrated eye spots thereon, each eye spot having a centroid. A relationship between the eye spot centroids is determined. One known relationship between one reference centroid and the centroid of one eye spot is identified. Finally, at least some of the remaining relationships between the reference centroids and the eye spot centroids are determined. The determined relationships provide a measure indicative of the eye aberration.
Abstract:
Procedimiento para medir las aberraciones de un ojo que comprende las etapas siguientes: focalización (351) de luz colimada en una matriz de microlentillas (33), comprendiendo su salida una cuadrícula (486) formada por los bordes de las microlentillas y un punto de referencia (481) en por lo menos algunos elementos de la cuadrícula, y presentando cada punto de referencia una relación conocida con el elemento de la cuadrícula y un centroide (483); determinación (352) de la posición de cada centroide de referencia (483) y de una relación (353) entre los centroides de referencia (483); focalización (355) en la matriz de microlentillas del frente de onda que surge del ojo, comprendiendo la salida de la matriz de microlentillas la cuadrícula y los puntos de ojo con aberraciones contenidos en la misma, presentando cada punto de ojo un centroide (482); determinación (356) de la posición del centroide (482) de cada punto de ojo y una relación (358) entre los centroides de puntos de ojo (482); identificación de una relación conocida (357) entre un centroide de referencia (483) y el centroide (482) de un punto de ojo; y determinación (362) de por lo menos algunas de las relaciones restantes entre los centroides de referencia (483) y los centroides de puntos de ojo (482), proporcionando dichas relaciones determinadas una medida indicativa del nivel de aberraciones del ojo.
Abstract:
Procedimiento (100) para crear un sistema destinado a optimizar una receta para una corrección de la refracción, que comprende las etapas siguientes: a) formar una base de datos (14) de resultados del tratamiento en un conjunto de pacientes tratados, teniendo asociado por lo menos un elemento de clasificación y comprendiendo una receta de la corrección determinada por el frente de onda (11) preoperatorio y un perfil visual posoperatorio; b) proporcionar un programa de búsqueda (16) que comunica con un procesador (12) adaptado para extraer resultados del tratamiento basados en un elemento de clasificación; c) proporcionar un primer módulo informático (13) para su utilización por el procesador, estando adaptado el primer módulo informático para calcular (104) a partir de los resultados extraídos del tratamiento en la base de datos una diferencia media entre la receta preoperatoria y el perfil posoperatorio de por lo menos alguno de los pacientes tratados anteriormente que tienen un elemento de clasificación en común con el paciente presente; d) proporcionar un segundo módulo informático (13) para su utilización por el procesador, estando adaptado el segundo módulo informático para ajustar la receta de la corrección del paciente presente en proporción a la diferencia media calculada para formar (108) una receta optimizada, teniendo el paciente presente un elemento de clasificación asociado y habiendo presentado un determinación del frente de onda realizada para medir una receta de corrección inicial, y e) proporcionar unos medios para transmitir (118) la receta optimizada automáticamente a un dispositivo de fabricación del implante (15). - - - (En el mencionado fascículo siguen las versiones en alemán y en francés, respectiva-mente, de las mismas reivindicaciones que se han traducido de la versión en inglés). - - - - 3 - - 7 - 1
Abstract:
A range of a wavefront sensor is extended by focusing collimated light onto a lenslet array, an output creating a grid formed by edges of the lenslets and a reference spot in the members of the grid. Each reference spot has a known relationship to the grid member and a centroid. A relationship between the reference centroids is determined. Next a wavefront emanating from an eye is focused onto the lenslet array, with the output from the lenslet array forming the grid and aberrated eye spots thereon, each eye spot having a centroid. A relationship between the eye spot centroids is determined. One known relationship between one reference centroid and the centroid of one eye spot is identified. Finally, at least some of the remaining relationships between the reference centroids and the eye spot centroids are determined. The determined relationships provide a measure indicative of the eye aberration.
Abstract:
An automated, objective method for determining the accommodative range and aberration profile of an eye using a wavefront sensor that iteratively determines the change in accommodation of the lens of an eye.