Carl Zeiss Meditec Gmbh

Carl Zeiss Meditec Ag

Carl Zeiss Ophthalmic Systems, Inc.

James Foley

Jay Wei

Matthew J Everett

Yan Zhou

Ming Lai

Keith E O'Hara

Scott A Meyer

Yonghua Zhao

Jochen M M Horn

Tobias Buehren

Jochen Horn

Christopher Baker

A binocular vision analyzer apparatus is used for determining a prescription of visual aids for the eyes of an individual. The apparatus includes first and second targets respectively corresponding to the first and second eyes of the individual and at least one illuminator unit for illuminating the targets. An optical system is configured to present respective virtual images of the first and second targets so as to be viewable by the respective first and second eyes. At least one beam splitter disposed in front of the first and second eyes directs the virtual images toward the respective eyes. The apparatus also includes first and second spherical correction devices and first and second cylindrical correction devices that respectively correspond to the first and second eyes.

Heads-up vision analyzer

A compact conical diffraction Littrow spectrometer is disclosed. The distortion of the conically diffracted spectral component beams is compensated and as a result, the diffracted spectral beams can still be focused into a substantially straight line to shine onto a detector array. A spectral domain optical coherence tomography (SD-OCT) system incorporating a Littrow spectrometer or a spectrometer having one or more shared focusing element(s) and an SD-OCT system incorporating a spectrometer that is substantially polarization independent are also disclosed.

Littrow spectrometer and a spectral domain optical coherence tomography system with a Littrow spectrometer

One embodiment of the present invention is a scanner for a beam of scanning optical coherence tomography (&ldquo;OCT&rdquo;) radiation that includes: (a) a source of OCT radiation; (b) a scanner; and (c) scanning optics whose image surface has a negative field curvature.

Optical coherence tomography optical scanner

Embodiments of the present invention provide a method and apparatus for measurement of aberration of an eye. One or more embodiments provide an aberration measurement instrument that enables measurement wherein Hartmann-Shack spots have reduced speckle; one or more embodiments provide an aberration measurement instrument that enables measurement of an eye having a large diopter power variation over different zones of the eye; one or more embodiments provide an aberration measurement instrument that enables measurement with accommodation control; one or more embodiment provide an aberration measurement instrument wherein radiation reflected by a cornea and radiation scattered by intra-ocular elements are blocked; and one or more embodiment provide an aberration measurement instrument wherein a hazy background produced by radiation multiply scattered within an eye is reduced.

Method and apparatus for measuring optical aberrations of an eye

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Fremont, CA, United States of America

James Foley