Palo Alto, CA, United States
Palo Alto, CA, United States
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Patent
Wavefront | Date: 2017-03-27

Embodiments of this invention generally relate to systems and methods for optical treatment and more particularly to non-invasive refractive treatment method based on sub wavelength particle implantation. In an embodiment, a method for optical treatment identifies an optical aberration of an eye, determines a dopant delivery device configuration in response to the optical aberration of the eye, wherein the determined dopant delivery device is configured to impose a desired correction to the eye to mitigate the identified optical aberration of the eye by applying a doping pattern to the eye so as to locally change a refractive index of the eye.


A corneal topographer includes: a flat panel display configured to display a light pattern and to project the light pattern onto a cornea of an eye disposed on a first side of the flat panel display; an optical system disposed on a second side of the flat panel display, the optical system being configured to receive and process reflected light from the cornea that passes through the flat panel display from the cornea to the optical system; a camera configured to receive the processed reflected light from the optical system and to capture therefrom a reflected light pattern from the cornea produced in response to the projected light pattern; and one or more processors configured to execute an algorithm to compare the projected light pattern to the reflected light pattern from the cornea, and to produce a topographic map of the cornea based on a result of the comparison.


The application relates to a method for planning a refractive treatment of an eye of a patient. The method comprises deriving an influence matrix from a plurality of prior eye treatments by, for each prior eye treatment of an associated eye, determining an intended refractive correction vector (IRC) characterizing a difference between measured pre-treatment high-order aberrations of the associated eye and a target refraction of the associated eye; and determining a surgically induced refractive correction vector (SIRC) of the associated eye characterizing a difference between the measured pre-treatment aberrations and measured posttreatment aberrations of the associated eye, wherein the influence matrix is derived so as to provide a correlation between the IRCs and the SIRCs; and defining or receiving a patient IRC vector characterizing a difference between measured pre-treatment high-order aberrations of the eye of the patient and a target refraction of the eye of the patient; adjusting the patient IRC vector based on the influence matrix.


A corneal topographer includes: a flat panel display configured to display a light pattern and to project the light pattern onto a cornea of an eye disposed on a first side of the flat panel display; an optical system disposed on a second side of the flat panel display, the optical system being configured to receive and process reflected light from the cornea that passes through the flat panel display from the cornea to the optical system; a camera configured to receive the processed reflected light from the optical system and to capture therefrom a reflected light pattern from the cornea produced in response to the projected light pattern; and one or more processors configured to execute an algorithm to compare the projected light pattern to the reflected light pattern from the cornea, and to produce a topographic map of the cornea based on a result of the comparison.


Patent
Wavefront | Date: 2016-11-03

Devices, systems, and methods that facilitate optical analysis, particularly for the diagnosis and treatment of refractive errors of the eye. An optical diagnostic method for an eye includes obtaining a sequence of aberration measurements of the eye, identifying an outlier aberration measurement of the sequence of aberration measurements, and excluding the outlier aberration measurement from the sequence of aberration measurements to produce a qualified sequence of aberration measurements. The sequence of aberrations measurements can be obtained by using a wavefront sensor. An optical correction for the eye can be formulated in response to the qualified sequence of aberration measurements.


Angle multiplexed optical coherence tomography systems and methods can be used to evaluate ocular tissue and other anatomical structures or features of a patient. The angle multiplexed optical coherence tomography system includes a light source, an optical assembly for obtaining a plurality of sample beams corresponding to respective anatomical locations of the eye of the patient, where individual sample beams are associated with a respective non-zero angle relative to a reference beam, and a detection mechanism that detects individual unique interference patterns respectively provided by the plurality of sample beams, for simultaneous evaluation of the anatomical locations.


An optical measurement system method for measuring a characteristic of a subjects eye use a probe beam having an infrared wavelength in the infrared spectrum to measure a refraction of the subjects eye at the infrared wavelength; capture at least two different Purkinje images at two different corresponding wavelengths from at least one surface of the lens of the subjects eye; determine from the at least two different Purkinje images a value for at least one parameter of the subjects eye; use the value of the at least one parameter to determine a customized chromatic adjustment factor for the subjects eye; and correct the measured refraction of the subjects eye at the infrared wavelength with the customized chromatic adjustment factor to determine a refraction of the subjects eye at a visible wavelength in the visible spectrum.


A system and method for measuring a characteristic of an eye of a subject receive data pertaining to the subject; assign the subject to an assigned age category based on the data pertaining to the subject; adjust a brightness level of a fixation target according to the assigned age category for the subject; provide the fixation target for a subject to view; and objectively measure at least one characteristic of the eye of the subject while the subject views the fixation target at the adjusted brightness level.


An optical measurement system and method measure a characteristic of a subjects eye. The optical measurement system receives from an operator, via a user interface of the optical measurement instrument, a begin measurement instruction indicating the start of a measurement period for objectively measuring at least one characteristic of the subjects eye. Subsequent to receiving the begin measurement instruction, the optical measurement system determines whether a criterion associated with the tear film quality of the subjects eye is not satisfied. In response to determining that the criterion is not satisfied, the optical measurement instrument takes one or more corrective actions to measure the characteristic of the subjects eye under a condition wherein the criterion is satisfied.


Grant
Agency: National Aeronautics and Space Administration | Branch: | Program: STTR | Phase: Phase II | Award Amount: 749.99K | Year: 2016

We propose to develop a Photon-Counting Integrated Circuit (PCIC) detector and focal plane array (FPA) with highest sensitivity, lowest noise and hence highest signal-to-noise ratio (S/N) among all FPAs covering the shortwave infrared band, for incorporation into a prototype imaging spectroscopy CAMM instrument for real-time operation on a planetary surface to guide rover targeting, sample selection (for missions involving sample return), and science optimization of data returned to earth, thus improving science return from instruments used to study the elemental, chemical, and mineralogical composition of planetary materials. During Phase I, we have successfully proven the concept of a limited-size array of PCIC detector pixels as well as the imaging spectrometer CAMM instrument. In Phase II, we will develop and prototype a PCIC focal plane array (FPA) as well as the imaging spectrometer CAMM instrument.

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