Tracking-Based Illumination Control for Light Adjustable Lens Alignment
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Solution Overview
Problem
Current methods for aligning illumination with Light Adjustable Lenses (LALs) implanted in the eye are labor-intensive and require significant skill from physicians, leading to potential misalignment and diminished visual acuity due to eye movements and involuntary movements during post-surgical adjustments.
Innovation Solution
A Light Adjustable Lens Tracker system that uses an Imaging System and Image Recognition System to create a LAL image, determine its position, and calculate a misalignment factor, generating an illumination control signal to assist in aligning the illumination pattern with the LAL, thereby reducing the effort and skill required for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual alignment method is used, then physician can maintain alignment through real-time adjustments, but the procedure requires several minutes and is difficult and tiring for the physician
Solution Approach 1:
The system enables self-alignment by using the imaging system to automatically detect LAL position and the illumination controller to adjust illumination pattern position accordingly, without requiring continuous manual intervention from the physician
Solution Approach 2:
The manual mechanical adjustment system is replaced with an automated optical-detection-and-control system that uses imaging to detect LAL position and electronically controls illumination pattern positioning
2Measurement precision
If manual alignment method is used, then physician can adjust illumination pattern position, but maintaining alignment throughout the procedure is difficult and requires additional skill mastery
Solution Approach 1:
The system performs self-alignment by automatically detecting LAL position through imaging and adjusting illumination pattern position through electronic control, eliminating the need for physicians to master complex manual alignment skills
Solution Approach 2:
The system continuously monitors LAL position through the imaging system and provides real-time feedback to the illumination controller, which automatically adjusts the illumination pattern to maintain alignment
3Measurement precision
If automated tracking system is implemented, then alignment precision is improved and physician fatigue is reduced, but system complexity increases
Solution Approach 1:
The imaging system serves multiple functions: it captures images for LAL position detection, provides real-time feedback, and enables automated tracking throughout the illumination procedure, consolidating multiple functions into a single system
Solution Approach 2:
The image recognition system acts as an intermediary between the imaging system and illumination controller, processing images to determine LAL position and translating it into control signals for illumination pattern positioning
Data Source
AI summary
A Light Adjustable Lens (LAL) Tracker comprises an Imaging System, for creating a LAL image by imaging a LAL implanted into an eye; and an Image Recognition System, coupled to the Imaging System, for determining a disk cross-correlator with the LAL image; determining an edge cross-correlator with the LAL image; and determining a LAL position by determining a combined cross-correlator from the disk cross-correlator and the edge cross-correlator. A Tracking-based Illumination Control System comprises the LAL Tracker for tracking a LAL implanted in an eye, including an Imaging System, and an Image Recognition System; and an Illumination Controller, coupled to the LAL Tracker, configured for determining a LAL misalignment factor, corresponding to a LAL misalignment that characterizes a misalignment of the LAL position with a LAL illumination pattern, and generating an illumination control signal in relation to the determined LAL misalignment factor.