Method and system for correcting aberrations of the eye for an ophthalmic instrument
AssigneeImagine Eyes
InventorsXavier Jean-François Levecq, Nicolas Chateau
Life of this patent
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Abstract
A method for correcting aberrations of the eye applied to an ophthalmic instrument operating with an analysis light beam, including: measurement of aberrations of the eye capable of interfering with the analysis beam, correction of the phase of the wave front of the analysis beam as a function of the measured values of the aberrations, measurement of eye movements carried out independently of the measurement of aberrations, and modification of the correction of the phase of the wave front of the analysis beam as a function of the measurement of eye movements.
Claims21
A method for correcting aberrations of the eye by correcting a phase of a wave front of an analysis light beam as a function of measured aberrations of the eye, comprising:
- measurement of aberrations of the eye capable of interfering with the analysis light beam,
- correction of the phase of the wave front of the analysis light beam as a function of the measured aberrations,
- measurement of eye movements carried out independently of said measured aberrations, and
- modification of the correction of the phase of the wave front of the analysis light beam as a function of said measured eye movements,
- wherein the aberration measurement is carried out at a given frequency and the modification of the correction of the phase of the wave front is carried out at an operating frequency greater than said aberration measurement frequency.
A system for correcting aberrations of the eye by correcting a phase of a wave front of an analysis light beam as a function of measured aberrations of the eye, comprising:
- means for measuring aberrations of the eye capable of interfering with said analysis light beam,
- correction means including an optical device and a control unit, for correcting the phase of the wave front of said analysis light beam as a function of the measured aberrations, and
- a device for measuring eye movements independently of said means for measuring the aberrations, said device for measuring eye movements comprising an array detector, an objective forming the image of the pupil of the eye on the detector, illumination means for forming two collimated beams incident on the pupil of the eye and forming two light spots on said pupil and processing means for determining variations in the eye movements from the relative positions of the spots with respect to the image of the pupil,
- said control unit being arranged for modifying the correction of the phase of the wave front of the analysis light beam as a function of said measured eye movements.
Dependencies are inferred from the claim text.