Virtual Surgical Reference Guidance for Intraocular Lens Alignment
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Solution Overview
Problem
Ocular surgeries, particularly intraocular lens implantation, face challenges due to the inability to accurately align surgical reference markings on wet and internal ocular tissues, which can shift or be distorted during the procedure, leading to improper alignment and complications such as poor visual acuity and double vision.
Innovation Solution
A real-time, multidimensional visualization system with virtual surgical reference indicia, including a natural patient vertical axis, is used to align surgical procedures accurately by overlaying pre-operative patient data onto real-time surgical fields, allowing surgeons to adjust and lock the reference indicia for precise guidance throughout the operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pre-surgery reference markings are made on ocular tissues, then initial alignment guidance is provided, but the markings are dissolved, altered or removed by surgical fluids and tissue shifts during the procedure
Solution Approach 1:
The patent uses video imaging to create a digital copy of the pre-surgery reference markings and displays this copy on a monitor during surgery. This virtual copy persists throughout the procedure without being affected by surgical fluids or tissue shifts, allowing continuous reference to the original alignment markers.
Solution Approach 2:
The patent introduces a video imaging system and display monitor as an intermediary between the physical reference markings and the surgeon's view. This intermediary captures the markings before surgery and presents them during surgery in a form that is not susceptible to degradation by surgical conditions.
2Adaptability or versatility
If freehand and best guess techniques are used for surgical adaptation, then individualized surgical adaptation is achieved, but measurement accuracy and influence on surgical outcome are limited
Solution Approach 1:
The patent provides real-time visual feedback by displaying the video image with reference markings on a monitor during surgery. This allows the surgeon to continuously monitor and adjust the alignment based on visual feedback, improving measurement precision while maintaining individualized adaptation.
Solution Approach 2:
The patent performs preliminary video imaging and reference marking during the pre-surgery examination in the vertical position. This preliminary action captures accurate anatomical references before the patient is positioned for surgery, ensuring that subsequent surgical adaptation is based on precise pre-measured data rather than estimation.
3Ease of operation
If patient positioning changes from vertical during pre-surgery examination to supine during surgery, then surgical procedure can be performed, but the measured axis of the eye shifts relative to the IOL implantation alignment
Solution Approach 1:
The patent performs preliminary video imaging and reference marking during the pre-surgery examination while the patient is in the vertical position. This captures the anatomical axes and reference points before positioning changes occur, preserving the accuracy of the original measurements.
Solution Approach 2:
The patent creates a digital copy of the pre-surgery anatomical references and displays this copy during surgery on a monitor. This virtual reference system maintains the original vertical-position alignment data, allowing the surgeon to compensate for positioning changes and maintain accurate axis alignment during the supine surgical procedure.
Data Source
AI summary
A system, method, and apparatus for performing intraocular lens implantation using real-time surgical reference indicium are disclosed. An example method includes recording a patient specific pre-operative still image of an eye prior to cyclorotation of the eye when a patient lies down for surgery and generating at least one real-time multidimensional visualization of at least a portion of the eye for display. The method further includes using the patient specific pre-operative still image to at least produce at least one virtual surgical reference indicium including an ocular natural vertical axis of the eye and align the at least one virtual surgical reference indicium to the eye in conjunction with the real-time multidimensional visualization of at least a portion of the eye. The patient specific pre-operative still image is captured under a dilation condition selected from the group consisting of natural dilation, chemical dilation, and no dilation.