Perimeter Combining Static and Kinetic Visual Field Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing perimetric test methods, either static or kinetic, are incomplete in describing a patient's field of vision, as they require separate examinations and different perimeter designs, leading to inconsistent results due to changes in eye fixation and patient conditions.
Innovation Solution
A method that combines moving and non-moving light stimuli, presented in succession or conversely, with adjustable luminous density profiles tailored to individual retinal sensitivity, allowing for a comprehensive examination by integrating the advantages of both static and kinetic perimetry in a single process, using a perimeter that can switch between test methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate static and kinetic perimetry examinations are performed using different perimeter designs, then each method can be optimized for its specific test type, but the examination time increases and results become inconsistent due to changes in eye fixation and patient conditions
Solution Approach 1:
The patent combines static and kinetic perimetry capabilities into a single perimeter device with one observational surface. The system presents both moving and non-moving light stimuli using the same optical path and detection system, eliminating the need for separate examinations and ensuring consistent measurement conditions throughout the combined test procedure
Solution Approach 2:
The perimeter device is designed with universal functionality to perform both static perimetry (presenting non-moving light stimuli) and kinetic perimetry (presenting moving light stimuli) using the same observational surface and stimulus presentation system. The control unit enables the device to switch between test modes while maintaining consistent optical conditions
2Measurement precision
If separate static and kinetic perimetry examinations are performed on different equipment units, then each device can be specialized for its test type, but the results become falsified due to changes in eye fixation and patient constitution between examinations
Solution Approach 1:
The patent merges static and kinetic perimetry capabilities into a single integrated perimeter system. Both test types are performed on the same observational surface using the same stimulus presentation mechanism, ensuring that eye fixation and patient conditions remain consistent throughout the examination. The unified design eliminates inter-device variability while the control unit manages the complexity of coordinating both test modes
3Measurement precision
If only static perimetry is performed, then cone sensitivity at the center of the field of vision can be tested well, but rod sensitivity in the periphery cannot be adequately evaluated
Solution Approach 1:
The perimeter device provides universal adaptability to test both cone sensitivity (via static perimetry at the visual field center) and rod sensitivity (via kinetic perimetry in the periphery). The system can present both non-moving and moving light stimuli on the same observational surface, enabling comprehensive evaluation of different retinal regions and cell types within a single examination
4Measurement precision
If only kinetic perimetry is performed, then rod sensitivity in the periphery can be tested well, but cone sensitivity at the center cannot be adequately evaluated
Solution Approach 1:
The perimeter device provides universal adaptability to test both rod sensitivity (via kinetic perimetry in the visual field periphery) and cone sensitivity (via static perimetry at the visual field center). The system can present both moving and non-moving light stimuli on the same observational surface, enabling comprehensive evaluation of different retinal regions and cell types within a single examination
Data Source
AI summary
The invention relates to a perimeter and a method for operating a perimeter during a field of vision examination, whereby light stimuli in the field of vision of the person to be tested are presented on an observational surface during the examination process. At least one moving light stimulus is presented to the eye during an examination process with a time offset and then at least one non-moving light stimulus or conversely is presented on the observational surface.