Bausch-lomb Incorporated

Other

Vuzix Corporation

Barry T Eagan

Lloyd G Allred

Ming Lai

Jeffrey B McBeth

Daozhi Wang

Paul J Travers

Robert J Schultz

Gerhard Youssefi

Gregg D Niven

Kristian Hohla

Ian G Cox

Theodore K Ricks

Joseph R Bentley

Kamal Sarbadhikari

Lloyd M Caldwell

Howard P Markman

Donald Charles Grove

Craig Schoof

Ning Zhang

D Robert Cady

Xan Nguyen

Lloyd Caldwell

Howard Markman

Donald C Grove

Llyod Caldwell

Llyod Allred

An apparatus for facilitating elimination of ambient light from an image of an object, comprising an illumination apparatus adapted to sequentially illuminate the object using multiple lighting arrangements, an image sensor. The apparatus adapted to form on the image sensor (i) a first image of the object using a first illumination arrangement, (ii) a second image of the object using a second illumination arrangement, and (iii) a dark image of the object without illumination. The image sensor is adapted to A) compare an intensity value of a first pixel in the first image to an intensity value of a corresponding, first pixel in the second image to determine a first minimum intensity value, B) determine if the first minimum intensity value is greater than an intensity value of a corresponding, first pixel in the dark image by greater than a predetermined amount; and C) identify an ambient intensity value (a) as the first minimum intensity value, if the first minimum intensity value is not greater than the intensity value of the first pixel in the dark image by greater than the predetermined amount, or (b) as the intensity value of the first pixel in the dark image, if the first minimum intensity value is greater than the intensity value of the first pixel in the dark image by greater than the predetermined amount.

Methods and apparatus for facilitating elimination of ambient light from an image

An ophthalmic apparatus adapted to project a waist of a beam of the light, such that a portion of the confocal region of the waist is projected onto the cornea. The source can be at least partially coherent and/or monochromatic. The source may be a laser or a laser diode. The beam can be a Gaussian beam, or a non-Gaussian beam. The apparatus can comprise a wavefront aberrometer, an axial eye length measuring apparatus or a refractometer.

Eye illumination apparatus and method

Aspects of the invention are directed to apparatus and methods for automatically setting a power level of light emitted by a light source; illuminating a retina of a patient with the light emitted by the light source; receiving, at a sensor, light reflected from the retina of the patient; providing a signal based upon the received light; determining whether the signal meets one or more signal quality criteria; automatically setting a second power level of light emitted by the light source; and repeating the steps of illuminating the patient's eye, receiving reflected light, providing the signal, and determining whether the signal meets the signal quality criteria. In some embodiments, setting the second power level is performed in response to determining whether the signal meets the signal criteria. In still other embodiments, the method comprises selecting an operating power based upon the signal quality criteria.

Power-adjusted aberrometer

An ocular device includes a housing, a rotatable ring, a first prism fixed in the rotatable ring, an indexable ring and a second prism fixed in the indexable ring. The housing has a stepped inner profile defining first and second circular tracks in the housing, the tracks being concentric about a rotational axis. The rotatable ring is disposed in the first circular track and is freely rotatable about the rotational axis with respect to the housing. The indexable ring is disposed in the second circular track and is indexable about the rotational axis.

Prismatic ocular device and personal video display device incorporating same

Methods and apparatus for facilitating determination of centroids of image spots in an image containing an array of image spots generated by an aberrometer, the image comprising a first plurality of pixels each pixel having a corresponding intensity value, the method comprising calculating an average intensity value for a second plurality of pixels in a perimeter around a pixel, the average calculated using a subset of the second plurality exclusive of at least a portion of the pixels in the perimeter.

Aberrometer having reduced noise

An interferometric axial eye length measurement apparatus having a light source adapted to produce a beam of partially coherent light, a first mirror and a second mirror disposed in the reference arm, and a processor adapted to control at least the second mirror such that a corneal interference peak and a second interference peak have a non-zero separation. There is at least one variable delay optical element having a delay signal, wherein the delay signal corresponding to a region between the corneal interference peak and second interference peak is substantially linear.

Eye length measurement apparatus

An apparatus for determining a position of a subject's cornea, comprising a camera, a first illumination apparatus adapted to provide a first beam of light and a first diffuse portion of light that are coincident, and a second illumination apparatus adapted to provide a second beam of light and a second diffuse portion of light, that are coincident. In some embodiments, the first, second, third and fourth images are disposed on the midpoints of a square, when a cornea is located along an optical axis of camera.

Apparatus and method for determining a position of an eye

An improved moir&#xe9; deflectometer device for measuring a wavefront aberration of an optical system includes a light source for illuminating a surface area of the optical system, an optical relay system for directing scattered light to a deflectometer component that converts the wavefront into a moir&#xe9; fringe pattern, a sensor/camera assembly for imaging and displaying the exit pupil of the optical system and the moir&#xe9;&#xb4; fringe pattern, and a fringe pattern to calculate the wavefront aberration of the optical system, being improved by an illumination source for illuminating the exit pupil of the optical system; and an alignment system cooperating with the illumination source in such a manner to consistently and accurately align a measurement axis of the device to the optical system. An associated method is also disclosed.

Moir&#xe9; aberrometer

A system and method for providing a predictive outcome in the form of a predictive best instruction for a therapeutic ophthalmic correction of a patient's vision defects. The predictive best instruction is derived from prospective therapeutic-outcome-influencing, new information that is analyzed in conjunction with optimized, historical therapeutic-outcome information. The instruction is preferably an optimized, custom, photoablative algorithm for driving a photoablative, excimer laser. The instruction can be provided on a fee basis.

System and method for predictive ophthalmic correction

An apparatus for registering a series of video images of a spherical or quasi-spherical surface subject to movement relies on projecting at least four diffusely scattering spots of light on the surface in a preferred angular manner, and monitoring the movement of images of the light spots relative to a reference image of the light spots.

Growing community of inventors

Spencerport, NY, United States of America

Barry T Eagan