Patent ID: 9332899
Filing Date: 2016-05-10
CPC Classification: A61B

Claim Text:
1. An apparatus for measuring astigmatic components of a patient eye during a cataract refractive surgery, comprising: a real-time intra-operative wavefront sensor configured to continually sample a first set of wavefronts returned from a patient eye during a first intra-operative time interval, where temporary surgically-induced factors that cause temporary changes to a pre-surgery measured astigmatic component of the patient eye occur during the first intra-operative time interval, where the first set of wavefronts is sampled after the removal of a crystalline lens of the patient eye putting the patient eye in an aphakic state, and with the real-time intra-operative wavefront sensor configured to output wavefront measurement data characterizing the first set of wavefronts; and a data processor, coupled to the real-time intra-operative wavefront sensor to receive the wavefront measurement data, configured to calculate an aphakic astigmatic component from wavefront data characterizing samples of the first set of wavefronts and to calculate a cornea-alone astigmatic component being a difference of the aphakic astigmatic component and a temporary astigmatic component, where the temporary astigmatic component is a measurement of the temporary astigmatic change caused by the temporary surgically-induced factors, and with the data processor further configured to output the cornea-alone astigmatic component.