6D Eye Orientation Tracking for Ophthalmological Laser Treatment
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Solution Overview
Problem
Conventional eye tracking systems for ophthalmological lasers do not capture all causes of decentration, leading to undesired treatment effects due to incomplete compensation for eye displacements during laser treatments.
Innovation Solution
A treatment apparatus that captures eye orientation in six dimensions, including translational and rotational movements, using cameras and a computing device to generate control data for adjusting laser irradiation positions and beam guidance, allowing for precise compensation of decentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional eye tracking systems are used to compensate for translational displacements, then some decentration compensation is achieved, but rotational movements are not captured leading to incomplete compensation and undesired treatment effects
Solution Approach 1:
The patent transitions from conventional 3D eye tracking (x, y, z translational movements) to 6D eye tracking by adding three rotational dimensions (cyclotorsion, vertical rotation, horizontal rotation). This dimensional expansion allows comprehensive capture of all eye movement types, enabling complete compensation for both translational and rotational displacements during laser treatment, thereby resolving the incomplete measurement problem
2Device complexity
If only translational displacement compensation is implemented, then the system remains simple, but treatment accuracy deteriorates due to uncorrected rotational decentrations
Solution Approach 1:
The patent implements a universal 6D eye tracking system that simultaneously measures both translational (x, y, z) and rotational (cyclotorsion, vertical, horizontal) eye movements using a single integrated apparatus. This multi-functional approach captures all six degrees of freedom of eye motion, enabling comprehensive decentration compensation without requiring multiple separate tracking systems, thus balancing complexity with precision
3Reliability
If six-dimensional eye orientation is ascertained including rotations, then comprehensive decentration compensation is achieved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical 6D tracking mechanisms with an optical-based imaging system using cameras to capture eye orientation. The computing device processes images to calculate all six degrees of freedom (three translational and three rotational movements) through computational algorithms, substituting mechanical complexity with optical and computational simplicity while achieving comprehensive eye movement measurement
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 improves treatment accuracy by enabling comprehensive compensation for eye displacements, resulting in better treatment outcomes by accurately determining and adapting to both translational and rotational movements of the eye.
Implementation Method 1
The eye recording data can be recorded in an optical or visible spectral range and/or an infrared spectral range
Data Source
AI summary
The invention relates to a treatment apparatus (10) and to a method for determining an eye orientation of an eye (16). The treatment apparatus (10) includes at least one ophthalmological laser (12) for irradiating the eye (16) by laser radiation (20); a capturing device (24) with at least one camera (26), wherein the capturing device (24) is formed to capture eye recording data by the at least one camera (26); and a computing device (18), which is formed to ascertain an eye orientation from the eye recording data, wherein the eye orientation includes a distance (3D), a vertical displacement (1D) and a horizontal displacement (2D) of the eye (16) in relation to a preset reference point of the ophthalmological laser (12) as well as a cyclotorsion (6D), a vertical rotation (4D) and a horizontal rotation (5D) of the eye (16), wherein the computing device (18) is further formed to generate control data for controlling the treatment apparatus (10) depending on the ascertained eye orientation.