Non-Invasive Intraocular Pressure Detection via Corneal Force-Displacement Analysis
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Solution Overview
Problem
Current methods for measuring intraocular pressure are invasive, require anesthesia, and are not suitable for home use, limiting their effectiveness in monitoring and controlling glaucoma progression due to day-night fluctuations in pressure.
Innovation Solution
A non-invasive intraocular pressure detecting device comprising a force-applying element, a force-sensing element, and a displacement-sensing element that applies a controlled force to the cornea, senses the applied force and displacement, and analyzes the relationship curve to determine the intraocular pressure using a processing unit, allowing for convenient and accurate measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional invasive methods are used to measure intraocular pressure, then measurement accuracy is improved, but patient comfort and ease of use deteriorate
Solution Approach 1:
The patent replaces traditional mechanical invasive measurement systems with a non-invasive optical detection system. The force-applying element uses optical fields to apply controlled force to the cornea, while force-sensing and displacement-sensing elements use optical principles to detect mechanical parameters without physical contact or penetration, thereby maintaining measurement accuracy while dramatically improving patient comfort.
Solution Approach 2:
The patent introduces a force-applying element as an intermediary between the measurement system and the cornea. This intermediary applies controlled force through the eyelid and cornea to create measurable deformation, allowing indirect measurement of intraocular pressure without direct invasion into the eye, thus balancing accuracy with patient comfort.
2Measurement precision
If traditional clinical measurement methods are used, then measurement precision is improved, but device complexity and suitability for home use worsen
Solution Approach 1:
The patent divides the measurement system into distinct functional modules: a force-applying element for controlled corneal deformation, force-sensing elements for detecting applied force, displacement-sensing elements for measuring corneal deformation, and a processing unit for calculating intraocular pressure. This segmentation allows each component to be optimized independently and facilitates miniaturization for home use while maintaining clinical-grade measurement precision.
Solution Approach 2:
The processing unit automatically processes the relationship curve between applied force and displacement to obtain characteristic critical points and calculate intraocular pressure values without requiring manual intervention or interpretation by medical professionals. This automation simplifies the device for home use while ensuring consistent, accurate measurements comparable to clinical standards.
3Measurement precision
If force is applied to measure intraocular pressure, then measurement accuracy is improved, but corneal deformation and potential damage increase
Solution Approach 1:
The patent applies only the minimum necessary force to the cornea to achieve measurable deformation for pressure detection. The force-applying element delivers controlled, partial action sufficient to create detectable displacement in the force-displacement relationship curve, avoiding excessive force that would cause tissue damage. This partial action approach maintains measurement accuracy while minimizing harmful effects on the cornea.
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 device provides a precise and comfortable method for measuring intraocular pressure, reducing measurement errors and enabling continuous monitoring of glaucoma progression without the need for invasive procedures or optical aids.
Implementation Method 1
a force-applying element (10), a force-sensing element (20), and a displacement-sensing element (30)... The force-sensing element (20), coupled to the force-applying element (10), is adapted to sense the applied force of the force-applying element (10)
Implementation Method 2
The displacement-sensing element (30), coupled to the force-applying element (10), is adapted to sense a displacement of the force-applying element (10)
Data Source
AI summary
An intraocular pressure detecting device includes the following elements. A force-applying element is adapted to apply a force to a target surface on a cornea of an eyeball in a direction, so that the target surface is deformed. A force-sensing element, coupled to the force-applying element, is adapted to sense the force applied by the force-applying element in the direction. A displacement-sensing element, coupled to the force-applying element, is adapted to sense a displacement of the force-applying element in the direction. A processing element is electrically connected to the force-sensing element and the displacement-sensing element to obtain a relationship curve between applied force and displacement. In particular, the processing element analyzes the relationship curve to obtain a characteristic critical point, and obtains an intraocular pressure value of the eyeball according to the applied force corresponding to the characteristic critical point.