Iris Laser Mapping and Tracking for Precise Eye Color Change
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Solution Overview
Problem
Conventional systems lack the ability to accurately deliver laser light to large areas of the iris for eye color change procedures, fail to account for iris tilt, and do not consider local absorption variations, leading to unsatisfactory outcomes and risks.
Innovation Solution
The method involves mapping the iris to determine spatially varying absorption coefficients, using a scanning pattern for laser delivery, and incorporating optical tracking to ensure accurate alignment and power adjustment based on iris tilt, with rangefinding to monitor deviations and adjust the fixation target as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional laser systems are used for eye treatment, then the system structure is simple, but the accuracy of laser delivery to large areas of the iris is poor
Solution Approach 1:
The patent divides the iris treatment into multiple scanned regions using a scanning pattern that moves the laser beam across different areas of the iris. This segmentation allows accurate treatment of large areas by systematically covering each region, rather than attempting to treat the entire iris at once with a single static beam position.
Solution Approach 2:
The patent performs preliminary mapping of the iris to characterize pigmentation distribution before delivering the laser treatment. This preliminary imaging and analysis allows the system to plan the scanning pattern and adjust laser parameters in advance, ensuring accurate delivery to the specific areas that need treatment.
2Productivity
If conventional systems treat only localized areas, then the treatment is simple, but the outcome is unsatisfactory for comprehensive eye color change
Solution Approach 1:
The patent employs a continuous scanning pattern that systematically covers the entire iris surface, ensuring that the laser treatment continuously progresses through different regions without interruption. This continuous action ensures comprehensive coverage and effective eye color change throughout the entire iris, rather than stopping at localized areas.
3Productivity
If the laser power is high enough to effectively treat the iris, then the treatment efficiency is improved, but the risk of damage to the eye increases
Solution Approach 1:
The patent adjusts the laser power and treatment parameters according to the local pigmentation characteristics of different iris regions. By mapping the iris first, the system identifies areas with higher pigmentation density and applies higher laser power selectively to those areas, while using lower power in less pigmented regions, thus optimizing treatment efficiency while minimizing overall damage risk.
Solution Approach 2:
The patent incorporates real-time monitoring and feedback mechanisms that allow the system to adjust laser power delivery based on the actual response of the iris tissue. This feedback control ensures that the laser power remains within safe limits while still achieving effective pigment removal, preventing both under-treatment and excessive damage.
4Reliability
If the laser beam is focused on a single point, then the system is simple, but it cannot account for iris tilt and patient motion
Solution Approach 1:
The patent implements dynamic tracking of the iris position and orientation throughout the treatment process. The scanning pattern and laser beam positioning are continuously adjusted in real-time to compensate for iris tilt and patient motion, ensuring that the laser remains accurately focused on the intended target areas despite changes in anatomical position.
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 allows for precise alteration of eye color by eliminating stromal pigment, overcoming the limitations of conventional methods, providing a safer and more effective alternative to contact lenses, corneal pigmentation, and iris implants.
Implementation Method 1
delivering laser light to portions of the eye that are responsible for giving the eye its color (e.g., the iris)... laser light to be delivered to an iris of a patient... sufficient to cause elimination of at least a portion of stromal pigment in the iris
Implementation Method 2
imaging the iris with an image sensor... to generate images of the iris
Implementation Method 3
spatially varying absorption coefficients... corresponding to varying absorption coefficients at the wavelength of the treatment laser in the stromal pigment
Data Source
AI summary
A method for altering an eye color of a patient with a color alteration procedure is disclosed that may include imaging the iris with an image sensor prior to the color alteration procedure to generate an image of the iris. A mapping of the iris may be generated from the image. The mapping may include a number of regions corresponding to varying absorption coefficients of a treatment wavelength in the stromal pigment of the iris. A laser system may be set, based on the mapping, to deliver laser light at a laser power sufficient to cause elimination of at least a portion of stromal pigment in the iris. The laser light may then be delivered with the laser system.