Cylindrical-Body Eyelid Tension Sensing for Reliable Readings
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Solution Overview
Problem
Existing apparatuses for measuring eyelid tension are large, complex, and prone to errors, requiring significant time and effort, and do not accurately reflect individual eyelid tension characteristics, which are crucial for predicting and preventing complications like keratectasia during vision correction surgeries.
Innovation Solution
A compact apparatus with a measuring sensor on a cylindrical body, featuring a tension or pressure sensor, contact part, and air intake for negative suction, allowing precise measurement of eyelid tension by evaluating the force during eyelid closure, and optionally including a controller for data display and joystick control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing apparatuses for measuring eyelid tension are used, then measurement capability is provided, but the apparatus becomes large, complex, and time-consuming
Solution Approach 1:
The apparatus divides the measurement function into separate modular components: a cylindrical body containing the tension sensor, a separate contact part for eye contact, and a controller. This segmentation allows each component to be optimized independently while reducing overall system complexity compared to monolithic designs
Solution Approach 2:
The tension sensor is extracted from complex mechanical structures and placed within a simple cylindrical body. The contact part is separated as a distinct component that can be easily positioned on the eye. This extraction simplifies the overall apparatus while maintaining measurement precision
2Measurement precision
If existing apparatuses for measuring eyelid tension are used, then measurement capability is provided, but measurement errors increase and time consumption increases
Solution Approach 1:
The apparatus is designed to be self-aligning and self-measuring. The cylindrical body automatically positions itself during eye contact, and the tension sensor continuously measures eyelid tension without requiring manual adjustment or complex setup procedures, significantly reducing measurement time while maintaining accuracy
Solution Approach 2:
The apparatus replaces complex mechanical measurement systems with electronic tension sensors that provide digital readings. This substitution eliminates mechanical error sources and allows for rapid, repeatable measurements without manual intervention
3Reliability
If existing apparatuses for measuring eyelid tension are used, then measurement capability is provided, but reliability decreases due to sensitivity to initial settings
Solution Approach 1:
The apparatus uses a tension sensor that measures force in newtons, providing a direct and reliable parameter for eyelid tension. The sensor's output is not sensitive to initial positioning settings, as it measures the actual tension force during eye closure, improving both reliability and precision
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 apparatus provides reliable and reproducible eyelid tension measurements, improving the diagnosis and treatment of conditions like keratoconus and keratectasia by objectively assessing eyelid tension, reducing the risk of surgical complications.
Implementation Method 1
an air intake which is installed in the space and configured to apply a negative suction pressure to the space
Implementation Method 2
the measuring sensor may include a tension sensor or a pressure sensor formed in a circumferential direction of the body
Data Source
AI summary
An apparatus for measuring eyelid tension includes: a cylindrical body; a measuring sensor formed on an outer circumferential surface of the body; and a contact part formed at a longitudinal distal end of the body to come into contact with the body of a person to be measured.