Eye Refractive Power Measurement Without Alignment Wait
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Solution Overview
Problem
Conventional eye refractive power measuring devices face challenges in accurately measuring children's eyes due to their restlessness, which leads to unstable alignment states and lower reliability of measurement values, requiring prolonged measurements that can result in uncooperative subjects.
Innovation Solution
An eye refractive power measuring device with a controller that consecutively measures refractive power without automatic fogging, displaying reliability information to allow for prompt completion of measurements, and configuring operation modes to adapt to restless subjects by prioritizing consecutive measurements for quick and reliable results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If preliminary measurement is executed after alignment state is properly established, then measurement accuracy is improved, but measurement time is extended and subject becomes uncooperative
Solution Approach 1:
The system performs preliminary measurement continuously from the initial state without waiting for proper alignment, thereby executing the preliminary action in advance and eliminating the need to wait for alignment before starting measurements
Solution Approach 2:
The system continuously executes preliminary measurement without interruption or waiting periods, maintaining continuous useful action throughout the measurement process to reduce total measurement time
2Reliability
If consecutive measurement is executed multiple times, then reliability of measured values is improved, but measurement time is extended and subject becomes uncooperative
Solution Approach 1:
The system continuously executes measurement processes without interruption, maintaining continuous useful action to obtain multiple measured values rapidly, thereby improving reliability while minimizing measurement time
Solution Approach 2:
The system performs preliminary measurement continuously from the initial state without waiting for proper alignment, thereby executing measurements in advance and reducing the total time required to obtain reliable results
3Measurement precision
If automatic fogging is executed based on preliminary measurement, then measurement accuracy is improved, but measurement time is extended due to waiting for proper alignment
Solution Approach 1:
The system performs preliminary measurement continuously from the initial state without waiting for proper alignment, thereby executing the preliminary action in advance and enabling automatic fogging to start immediately without delay
Solution Approach 2:
The system maintains continuous measurement action without interruption or waiting periods, ensuring that automatic fogging is executed continuously based on ongoing preliminary measurement results, thereby improving measurement efficiency
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 approach increases the number of reliable measurement values obtained within a short period, enabling proper measurement execution even with restless subjects by displaying reliability information and allowing for timely completion of examinations.
Implementation Method 1
The light receiver is configured to receive a reflected light that is reflected from the fundus
Data Source
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AI summary
A measuring device (1) according to one aspect of the present disclosure projects a measuring light toward a fundus of a subject's eye; receives a reflected light reflected from the fundus; and then measures an eye refractive power of the subject's eye based on a light-receiving signal. Additionally, reliability of a measured value is determined. Specifically, a process, in which the eye refractive power is measured based on the light-receiving signal, is consecutively executed an undetermined number of times until an end condition is satisfied. The measured value of the eye refractive power obtained in every execution of the process is displayed on a display together with information indicating the reliability of the measured value.