Laser Testing Eye Body With Separate Irradiation Test Object
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Solution Overview
Problem
Current test objects for pulsed laser radiation in refractive laser treatments of the human eye fail to adequately simulate all degrees of freedom of eye movement, particularly rotational movements, during calibration and treatment simulations.
Innovation Solution
A method involving an eye body with a pattern simulating a pupil and/or iris structure, along with a separate irradiation test object made of modifiable material, is used to apply laser radiation according to a predefined application profile, allowing visualization of the material modification and simulation of complex eye movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional sheet- or plate-shaped test objects with imprinted eye structures are used, then the test object structure is simple and easy to manufacture, but all degrees of freedom of eye movement (particularly rotational movements) cannot be adequately simulated
Solution Approach 1:
The test object is divided into two separate components: an eye body (which may be simple and stationary) and a separate irradiation test object (which simulates the corneal surface). This segmentation allows the irradiation test object to be independently positioned and oriented to simulate various eye movements including rotational movements, while the eye body maintains structural simplicity.
Solution Approach 2:
A pattern bearing surface (the irradiation test object) is introduced as an intermediary between the eye body and the laser device. This intermediary carries the eye structure pattern and can be independently positioned and oriented relative to the eye body, enabling simulation of complex eye movements while keeping the overall system manageable.
2Measurement precision
If separate irradiation test object is used above the pattern, then material modification allows visualization of application profile, but the setup complexity increases compared to direct irradiation of imprinted surfaces
Solution Approach 1:
The irradiation test object is made of material that undergoes visible modification when exposed to laser radiation. This material change (such as discoloration, ablation, or other permanent marks) provides direct visual feedback of the laser application profile, enabling precise measurement and calibration without requiring complex imaging systems.
Solution Approach 2:
The eye structure pattern is copied onto the irradiation test object, which then serves as both the target for laser irradiation and the medium for visualizing the application profile. This copying approach simplifies the setup by combining multiple functions into a single component.
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 method enables effective visualization and calibration of pulsed laser devices by simulating patient-specific eye movements and treatments, improving the accuracy of laser radiation application and corneal ablation profiles.
Implementation Method 1
The irradiated laser radiation causes a photodisruptive process in the corneal tissue, which results in tissue separation or vaporization of tissue
Implementation Method 2
applying laser radiation of the laser device to the irradiation test object according to a predefined application profile, so that a material modification which corresponds to the application profile is generated in the irradiation test object
Data Source
Figure 1
Figure 2A~2C
AI summary
A method for testing a laser device which is configured for emitting pulsed, focused laser radiation includes providing an artificial eye body which bears a pattern that simulates a pupil and/or an iris structure, and arranging an irradiation test object, which is separate from the eye body and which is made of a material which is modifiable by the laser radiation of the laser device, above the pattern. The method further comprises applying laser radiation of the laser device to the irradiation test object according to a predefined application profile, so that a material modification which corresponds to the application profile is generated in the irradiation test object.