Perimeter Initial Luminance Determination From Past Sensitivity Data
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conducting multiple perimetry tests in a shorter time while reducing the burden on examinees, as existing methods require lengthy procedures due to numerous measurements and varying luminance levels across multiple test points.
Innovation Solution
A perimeter system that stores sensitivity distribution data for each examinee, allowing for the determination of initial luminance and stimulus movement start positions based on past perimetry results, enabling efficient execution of different perimetry types by starting from values closer to the examinee's visual field sensitivity and minimizing redundant measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple perimetry tests are conducted with numerous measurements and varying luminance levels, then measurement precision is improved, but test duration increases
Solution Approach 1:
The system performs preliminary actions by storing sensitivity distribution data from previous perimetry tests and using this historical information to determine initial luminance values and stimulus positions before the actual test begins. This preliminary preparation allows the test to start from more informed parameters, reducing the need for extensive preliminary measurements during the current test.
Solution Approach 2:
The system dynamically changes parameters (initial luminance values and stimulus movement start positions) based on the examinee's historical sensitivity distribution data. By adjusting these parameters according to individual patient history, the system optimizes the test to require fewer measurements while maintaining precision, thus reducing overall test duration.
2Ease of manufacture
If perimetry tests start from initial luminance values, then test procedure is simplified, but test duration increases due to redundant measurements
Solution Approach 1:
The system performs preliminary computation of optimal initial luminance values based on stored sensitivity distribution data before the test begins. This preliminary action replaces the need for lengthy trial-and-error measurements during the actual test, maintaining procedural simplicity while significantly reducing test duration.
Solution Approach 2:
The system uses feedback from historical perimetry results (stored sensitivity distribution data) to inform the initial test parameters. This feedback mechanism allows the system to learn from previous measurements and set more accurate initial values, eliminating redundant measurements and reducing test time without complicating the procedure.
3Reliability
If perimetry is conducted without using past measurement data, then test independence is maintained, but measurement precision deteriorates due to redundant testing
Solution Approach 1:
The system performs preliminary retrieval and processing of historical sensitivity distribution data before the current test. This preliminary action enables the system to use past information to optimize current measurements, improving precision without compromising test independence since the historical data is used only for parameter determination, not for influencing the actual measurement process.
Solution Approach 2:
The system changes test parameters (initial luminance, stimulus position) based on historical data to optimize measurement precision. This parameter adjustment allows the test to leverage past information for better accuracy while maintaining measurement independence, as the actual perimetry measurements remain unaffected by the historical data usage.
Data Source
AI summary
Perimeter has input means for inputting identification data of an examinee and a kind of perimetry to be conducted, means for judging whether or not the examinee has already received the perimetry, means to read examinee measurement information, means to judge whether or not a kind of inputted perimetry is different from the past perimetry, means to compute and determine initial stimulus luminance of the perimetry to be conducted from now on as a value equal to the sensitivity which is shown in sensitivity distribution data or closer thereto from the sensitivity distribution data of the past perimetry if different kind is judged, and means for starting the perimetry with the determined initial stimulus luminance.