Eyeball Optical Measuring Device Pupil Constriction Retinal Protection
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Solution Overview
Problem
Conventional eyeball measurement devices face challenges in non-invasively measuring glucose concentration in blood due to the risk of high-energy light causing harm to the retina, and the need for invasive methods like needle sticking for blood glucose measurement.
Innovation Solution
An eyeball optical measuring device that irradiates the eyeball with measuring light of higher energy density, while using a separate light irradiation unit to reduce the energy density of light reaching the retina by narrowing the pupil diameter, thereby minimizing the risk of retinal damage and allowing for non-invasive glucose concentration measurement in the aqueous humor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-energy density light is used for optical measurement of the eyeball, then measurement precision is improved, but the risk of retinal harm increases
Solution Approach 1:
The patent applies preliminary action by irradiating the eyeball with low-energy density light before the actual measurement to constrict the pupil. This preliminary pupil constriction reduces the amount of high-energy density light that can reach the retina during subsequent measurements, thereby preventing retinal harm while maintaining measurement precision.
Solution Approach 2:
The patent uses an intermediary approach by introducing a separate light irradiation unit that emits low-energy density light to control pupil size. This intermediary light source acts as a mediator between the high-energy measurement light and the retina, controlling the amount of energy that reaches the retinal tissue through pupil constriction.
2Reliability
If invasive methods like needle sticking are used for blood glucose measurement, then measurement reliability is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent replaces the mechanical invasive method (needle sticking) with an optical non-invasive measurement system. By measuring glucose concentration in the aqueous humor through optical properties (absorption or polarization rotation) and using the correlation between aqueous humor and blood glucose, the system eliminates the need for mechanical puncture while maintaining measurement reliability.
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
Enables a non-invasive, safe measurement of glucose concentration in the aqueous humor, reducing the need for invasive methods and minimizing the risk of retinal harm by controlling the energy density of light used in the measurement process.
Implementation Method 1
measure a glucose concentration in the aqueous humor based on the amount of absorption of light passing through the eyeball
Implementation Method 2
based on a polarization plane rotation angle of the light passing through the eyeball
Implementation Method 3
the light irradiation unit that irradiates the eyeball with irradiation light prior to the optical measurement by the optical measuring unit, the irradiation light having a lower energy density than an energy density of the measuring light
Data Source
AI summary
An eyeball optical measuring device includes: an optical measuring unit that irradiates an eyeball of a subject with measuring light to perform an optical measurement of the eyeball; and a light irradiation unit that irradiates the eyeball with irradiation light prior to the optical measurement by the optical measuring unit, the irradiation light having a lower energy density than an energy density of the measuring light.