Enhanced Cutting Pattern for Ophthalmic Laser Incisions
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Solution Overview
Problem
Laser eye surgery systems face challenges in maintaining precision and accuracy due to latency issues between eye trackers and laser beam adjustments, leading to potential inaccuracies in incisions during ophthalmic procedures.
Innovation Solution
The implementation of a non-ultraviolet ultra-short pulsed laser system that uses an enhanced cutting pattern with increased density of photodisruption points to compensate for patient movement, ensuring robust and accurate incisions by establishing a baseline pattern and adding secondary points to increase connectivity and tolerance for positional errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an eye tracker is used to track eye position and adjust the laser beam in real time, then the system can compensate for eye movement, but latency between eye tracker signals and laser adjustment introduces positional errors that reduce incision accuracy
Solution Approach 1:
The patent pre-calculates and stores a lookup table of corrective offsets for various eye positions before surgery begins. During the procedure, the eye tracker provides real-time position data, and the system retrieves the pre-computed corrective offset from the lookup table to adjust the laser beam position, eliminating the need for real-time complex calculations and reducing latency-induced errors
Solution Approach 2:
The patent anticipates potential positioning errors due to latency by incorporating a robust cutting pattern with increased density of photodisruption points. This redundant pattern provides a buffer that compensates for the positional inaccuracies introduced by system latency, ensuring that even if some points are misplaced, the overall cut remains accurate and complete
2Adaptability or versatility
If the laser system waits for eye tracker signals to adjust beam position, then it can track eye movement, but the inherent delays cause the incision pattern to deviate from the programmed trajectory
Solution Approach 1:
The patent pre-calculates and stores a lookup table of corrective offsets for various eye positions before surgery begins. During the procedure, the eye tracker provides real-time position data, and the system retrieves the pre-computed corrective offset from the lookup table to adjust the laser beam position, eliminating the need for real-time complex calculations and reducing latency-induced errors
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces the likelihood of incomplete or imprecise cuts, enhancing the accuracy and reliability of ophthalmic laser surgeries by compensating for eye movement-related positional errors.
Implementation Method 1
establishing an enhanced cutting pattern comprising a plurality of enhanced photodisruption points selected to decrease potential adverse effects due to patient movement
Data Source
AI summary
A method and apparatus for performing ophthalmic laser surgery using a pulsed laser beam is provided. The method includes establishing an initial cutting pattern comprising a plurality of original photodisruption points, establishing an enhanced cutting pattern comprising a plurality of enhanced photodisruption points selected to decrease potential adverse effects due to patient movement and having increased density over a fixed area as compared with the plurality of original photodisruption points, and performing an ocular surgical procedure according to the enhanced cutting pattern Enhanced cutting patterns may include circular cuts around the periphery of a capsule, vertical side cuts for lens fragmentation, raster lamellar cuts, and grid lamellar cuts. Each photodisruption point in the initial cutting pattern and the enhanced cutting pattern comprises a laser target point.