Laser Treatment Cyclotorsion Compensation via Pseudo-Rotation
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Solution Overview
Problem
Laser treatment systems face challenges in accurately adjusting for changes in the eye, such as pupil size and cyclotorsion, due to misinterpretation of pseudo-rotation as real rotation, leading to incorrect placement of ablation profiles.
Innovation Solution
A system that stores and processes optical data from an optical recorder to distinguish between pseudo-rotation and actual cyclotorsion, using measured cyclotorsion and pseudo-rotation calculations to adjust laser treatment accordingly, ensuring precise alignment and compensation for eye movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser treatment systems center treatment on a fixed portion of the eye (such as pupil center), then the treatment application is simplified and faster, but the treatment accuracy deteriorates due to eye movements and pupil size changes
Solution Approach 1:
The system dynamically tracks the pupil center position throughout the treatment process and adjusts the treatment profile in real-time to compensate for eye movements and pupil size changes, rather than relying on a fixed initial centering
Solution Approach 2:
The system continuously monitors pupil size and position during treatment and uses this feedback information to adjust the treatment profile, ensuring accurate placement despite changes in eye configuration
2Manufacturing precision
If the system measures cyclotorsion to adjust for eye rotation, then treatment accuracy improves, but the system complexity increases due to the need to distinguish pseudo-rotation from actual cyclotorsion
Solution Approach 1:
The system separates the measurement of cyclotorsion from the measurement of pupil size changes by using different reference frames and calculation methods, allowing independent analysis of each factor
Solution Approach 2:
The system uses an intermediary reference frame (such as the limbus or iris pattern) that remains stable relative to the eye globe, allowing differentiation between actual eye rotation (cyclotorsion) and apparent rotation caused by pupil size changes
3Manufacturing precision
If the system compensates for pupil size changes, then treatment accuracy under different light conditions improves, but the difficulty of detecting and measuring actual eye movements increases
Solution Approach 1:
The system measures pupil size in multiple dimensions (diameter, area, shape) and uses these multi-dimensional measurements to distinguish between actual eye movements and apparent movements caused by pupil constriction or dilation
Data Source
AI summary
According to certain embodiments, a system comprises one or more memories and one or more processors. The one or more memories store optical data from an optical recorder comprising at least two optical data sets by: receiving a first optical data set of an eye with a pupil having a first pupil size; and receiving a second optical data set of the eye with the pupil having a second pupil size. The one or more processors determine a pseudo-rotation related to a pupil size change, receive a measured cyclotorsion, calculate an actual cyclotorsion from the measured cyclotorsion and the pseudo-rotation, and adjust a laser treatment according to the actual cyclotorsion.