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

Benefits of technology

The present invention relates to a system and method for providing real-time refraction or wavefront aberrometer data to a surgeon during cataract surgery or other vision correction procedures. The system and method allow the surgeon to see the histogram of refractions and the confidence level of the refractions, which can help them make informed decisions regarding the optical power of the intra-ocular lens (IOL) to be implanted during the surgery. The system and method also account for dynamic surgical factors such as the alignment of the patient eye relative to the refractometer or auto-refractor, pupil size, and intra-ocular pressure to control the variation in the measured refraction. Overall, the invention improves the accuracy and efficiency of refractive cataract surgery and other vision correction procedures.

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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