Eye Centering Device Using Chromatic Aberration for Visual Axis Alignment
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Solution Overview
Problem
Centering the visual axis of an eye for therapeutic and diagnostic procedures is challenging due to difficulties in accurately locating and maintaining the correct alignment, leading to undesired results.
Innovation Solution
A centering device utilizing two color sources with different wavelengths, arranged coaxially in a beam path, which superimpose on the retina only when aligned with the visual axis, allowing for precise determination of eye orientation through chromatic aberration, and includes a control and capturing device to ascertain this alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional methods are used to center the visual axis, then the procedure can be performed, but it is time consuming and difficult to locate the correct centering
Solution Approach 1:
The patent employs color sources with different wavelengths (e.g., red and green LEDs) that exhibit different focal points in the eye due to chromatic aberration. By observing the relative positions of these colored light spots on the retina, the system automatically determines the visual axis orientation and centers the beam path accordingly, achieving fast and accurate centering without manual adjustment.
2Ease of operation
If manual centering methods are used, then the eye can be centered, but the process is difficult and requires skilled intervention
Solution Approach 1:
The system uses the eye's own optical properties (chromatic aberration) to automatically determine its own visual axis orientation. The color sources and capturing device work together to detect the relative positions of colored light spots on the retina, and the control device automatically calculates the required beam path adjustment, eliminating the need for manual skilled intervention while maintaining high precision.
3Device complexity
If a single wavelength source is used, then the device is simple, but it cannot exploit chromatic aberration for centering
Solution Approach 1:
The patent divides the single light source into multiple color sources with different wavelengths (e.g., separate red and green LEDs). Each color source emits light at a specific wavelength that focuses at different points in the eye due to chromatic aberration. This segmentation allows the system to exploit the differential focusing to determine visual axis orientation, significantly increasing centering speed while maintaining reasonable device complexity through the use of multiple simple LED components.
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 faster and more accurate centering of the eye, improving diagnostic and treatment outcomes by ensuring precise alignment of the visual axis with the beam path.
Implementation Method 1
a chromatic aberration is always present in the human eye, and thus different wavelengths, which are incident on the eye in decentered manner, are focused in the eye with different strength
Data Source
AI summary
The invention relates to a centering device (12) for determining a centering of a visual axis of an eye (14) to a beam path, wherein the centering device (12) comprises at least two color sources (16, 18), a control device (20) and a capturing device (22), wherein the color sources (16, 18) are arranged in the beam path of the centering device (12), wherein a respective color signal (17, 19) in a visible spectral range can be output by the color sources (16, 18) to an eye interface (26) via the beam path, wherein a wavelength of the respective color signals (17, 19) differs, and wherein the control device (20) is formed to control the capturing device (22) for ascertaining an eye orientation upon presence of a superposition criterion, by which a superposition of the color signals (17, 19) on the visual axis is indicated.