Two-Wavelength Reflectometry for Melanin Measurement

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Solution Overview

Problem

Current methods for measuring melanin levels in the eye, particularly in the retinal pigment epithelium (RPE) and choroid, are either complex, expensive, or time-consuming, and can lead to excessive heating during laser treatments due to abnormal melanin concentrations, posing a risk of tissue damage.

Innovation Solution

A two-wavelength reflectometry process is employed to determine melanin levels in the RPE and choroid by measuring light reflection from light beams with wavelengths between 550 nm and 900 nm, allowing for accurate calculation of melanin concentrations using a reflectometer, distinguishing between RPE and choroid reflections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional methods for measuring melanin levels are used, then measurement capability is provided, but the methods are complex, expensive, and time-consuming

Engineering Contradiction:

Improvemelanin level measurementVSAvoidmeasurement system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical and electronic measurement systems with a simplified optical reflectometry system. By using light reflection principles and basic optical components (light source, detector, and wavelength selection), the system achieves melanin measurement without requiring complicated equipment, thereby reducing device complexity while maintaining measurement capability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent utilizes wavelength-dependent optical parameters of melanin to enable measurement. By selecting specific wavelengths (including wavelengths where melanin has characteristic absorption or reflection properties), the system can distinguish melanin concentrations without complex processing, simplifying the measurement approach while maintaining precision

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If conventional measurement methods are used, then melanin levels can be assessed, but the process is time-consuming

Engineering Contradiction:

Improvemelanin concentration determinationVSAvoidmeasurement time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The optical reflectometry system performs measurements rapidly by using light reflection principles that can be captured and processed instantaneously. This replaces time-consuming conventional methods with a quick optical measurement process, reducing measurement time while maintaining accurate melanin concentration determination

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system performs preliminary wavelength selection and optical parameter characterization before actual measurement, allowing for rapid and accurate melanin assessment without time-consuming real-time processing during the measurement itself

Inventive Principle:

Principle #10Preliminary action

3Productivity

If abnormal melanin concentrations are not detected, then treatments can proceed, but excessive heating may occur causing tissue damage

Engineering Contradiction:

Improvetreatment efficiencyVSAvoidexcessive heating and tissue damage

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary measurement of melanin concentrations in the RPE and choroid before laser treatments are administered. By detecting abnormal melanin levels in advance, the system enables clinicians to adjust treatment parameters or modify the treatment plan, preventing excessive heating and tissue damage while maintaining treatment efficiency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The measurement system provides feedback information about melanin concentrations to the treatment planning process. This feedback loop allows for real-time adjustment of laser treatment parameters based on individual patient melanin levels, preventing harmful heating effects while maintaining productive treatment outcomes

Inventive Principle:

Principle #23Feedback

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 provides a simple, cost-effective, and accurate means to assess melanin levels, preventing excessive heating during eye treatments and enhancing the safety of photocoagulation and photostimulation procedures by determining abnormal melanin concentrations.

Implementation Method 1

measuring light reflection from light beams with wavelengths between 550 nm and 900 nm

Methodology Applied

Scientific EffectLight reflection: Reflection

Implementation Method 2

melanin within the eye serves many important functions... Melanin in the eye provides protection to the eye by absorbing harmful ultraviolet radiation

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS10194798B1Measuring RPE and choroid melanin levels with reflectometer

Publication Date: 2019.02.05 OJAI RETINAL TECHNOLOGY LLC

AI summary

A process for determining levels or concentrations of melanin within an eye includes generating first and second light beams of a different wavelength. The first and second light beams are applied into the eye, such as a retinal pigment epithelium and choroid of the eye. The amount of light reflected from the eye from the first light beam and the second light beam is measured, such as using a reflectometer. A level or concentration of the melanin within the eye is calculated using the measured amount of light reflected from the eye from the first and second light beams.