Obtaining and Displaying Histogram and/or Confidence of Intra-Operative Refraction and/or IOL Power Recommendation

Abstract

In order to take advantage of the real time nature of intra-operative refraction or wavefront aberrometry, and visually make the history of the measurements apparent to a surgeon, a histogram of frequency vs IOL results calculated from an IOL formula is computed and IOL suggestions being accumulated are displayed in a histogram. One embodiment is a means to present to a surgeon a histogram of intra-operative refractions. Another embodiment is to automatically and intra-operatively detect the aphakic phase of a cataract surgery to display a histogram of a recommended IOL power.

Description

TECHNICAL FIELD OF THE INVENTION[0001]One or more embodiments of the present invention relate generally to intra-operative refraction or wavefront aberrometry. In particular, one embodiment is related to means to present to a surgeon the histogram and / or confidence level of intra-operative refraction or wavefront aberrometry measurement during a cataract surgery, especially the histogram, and / or confidence level of aphakic refraction and / or the associated intra-ocular lens (IOL) power recommendation.BACKGROUND OF THE INVENTION[0002]A need has been identified in recent years in terms of providing real time intra-operative refraction or wavefront measurement feedback to a surgeon performing a refractive cataract surgery or other vision correction procedures on the eye of a patient. The intra-operative refraction or wavefront measurement, especially one obtained from an aphakic eye when the natural lens of the eye is removed, can help to guide a surgeon better determine the optical pow...

AI Technical Summary

Problems solved by technology

However, one issue associated with the use of an intra-operative wavefront aberrometer or auto-refractor is that the real time refraction value can vary as a result of many dynamic surgical factors, including the alignment of the patient eye relative to the aberrometer or auto-refractor, patient fixation and angle alpha (angle between the center of the pupil and the visual axis), varying pupil size, the intra-ocular pressure (IOP), the hydration of the incision wound, the tear film, and the pressure exerted on the cornea from eye-lid-opening speculum.

This can cause some confusion to a surgeon in determining what exact IOL power to select for implantation during a cataract surgery.

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