Wavelength-Selective Optical Filter on Contact Lens for Laser Surgery
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Solution Overview
Problem
Ophthalmologists are exposed to potentially hazardous fluorescence radiation during therapeutic treatments, which can cause eye damage and introduce noise into measurement systems, complicating accurate treatment monitoring.
Innovation Solution
A contact lens assembly with an optical filter is used, where the filter is transparent to therapeutic radiation but opaque to fluorescence radiation, allowing therapeutic radiation to pass through while blocking hazardous fluorescence radiation from reaching the ophthalmologist's eyes and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If therapeutic radiation is directed at the patient's eye during treatment, then the treatment effectiveness is improved, but hazardous fluorescence radiation is generated that exposes the ophthalmologist to eye damage and introduces noise into measurement systems
Solution Approach 1:
A contact lens assembly with an optical filter is positioned between the patient's eye and the ophthalmologist. The optical filter selectively transmits therapeutic radiation wavelengths while blocking fluorescence radiation wavelengths, allowing the treatment to proceed effectively while protecting the ophthalmologist from hazardous exposure and reducing measurement noise
2Object-affected harmful factors
If the optical filter blocks fluorescence radiation, then the protection against hazardous radiation and reduction of measurement noise is improved, but the filter must be carefully designed to maintain transparency to therapeutic radiation
Solution Approach 1:
The optical filter is designed with specific wavelength-selective parameters that allow it to transmit therapeutic radiation while blocking fluorescence radiation. By carefully controlling the optical properties (transparency at therapeutic wavelengths, opacity at fluorescence wavelengths), the filter achieves its protective function without requiring overly complex multi-layer structures
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
The solution effectively protects ophthalmologists from hazardous radiation exposure and reduces noise in measurement systems, enhancing the accuracy and safety of therapeutic treatments.
Implementation Method 1
The eye of the patient may emit fluorescence radiation responsive to excitation by the therapeutic radiation
Implementation Method 2
The optical filter may be opaque to the fluorescence radiation and may block the fluorescence radiation from passing through the contact lens assembly
Data Source
AI summary
A contact assembly (301,400) for laser surgery may include a contact lens (402) and an optical filter (404). The contact lens (402) may be configured to be positioned in an optical path of therapeutic radiation (310) directed at an eye (100) of a patient. The optical filter (404) may be coupled to an outer surface (402A) of the contact lens (402). The optical filter (404) may be transparent to the therapeutic radiation (310) with a first wavelength and may be opaque to radiation (318) with a second wavelength different than the first wavelength.