Mobile Vision Testing With Sensor-Controlled Test Conditions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing visual testing systems for chronic macular diseases are cumbersome and costly, requiring standardized conditions that limit their use to specific environments and user-dependent setups, making self-testing difficult and the results less comparable to professional assessments.
Innovation Solution
A mobile device, such as a smartphone or tablet, equipped with sensors to monitor and control parameters like distance to the screen, screen brightness, and ambient luminosity, ensuring tests are performed under controlled conditions, using apps that replicate professional tests like visual acuity, contrast sensitivity, and Amsler Grid, with results stored for physician review.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standardized testing conditions are used to ensure test accuracy, then measurement precision is improved, but device complexity and ease of operation deteriorate due to strict requirements for distance, lighting, and equipment setup
Solution Approach 1:
The system automatically monitors and adjusts testing parameters without requiring manual intervention. The mobile device self-regulates distance through camera-based detection, self-adjusts screen brightness based on ambient light sensors, and self-validates test conditions, eliminating the need for manual setup and maintenance of strict testing environments
Solution Approach 2:
The system dynamically adjusts testing parameters within controlled ranges rather than requiring fixed exact values. Distance requirements are defined as ranges (e.g., 30-50cm) rather than exact distances, and screen brightness is automatically adapted to ambient conditions, allowing flexible operation while maintaining test validity
2Measurement precision
If professional testing equipment is used to ensure reliable results, then measurement precision is improved, but loss of time and loss of substance worsen due to frequent visits and cost intensity
Solution Approach 1:
The mobile device replicates professional ophthalmological testing capabilities through software applications that simulate standardized eye charts and testing protocols. The system copies the functional essence of professional equipment rather than requiring physical replication, enabling patients to perform accurate vision tests at home using their smartphones or tablets
Solution Approach 2:
Patients independently perform vision testing without requiring physician presence or professional equipment. The system enables self-administered tests with automated parameter monitoring and result evaluation, allowing patients to monitor their own vision progression and reduce the frequency of clinic visits
3Measurement precision
If strict monitoring of testing parameters is implemented to ensure result comparability, then measurement precision is improved, but device complexity worsens due to multiple sensors and control mechanisms required
Solution Approach 1:
The mobile device's existing sensors and components are utilized for multiple functions: the camera serves both for distance measurement and visual acuity testing, the ambient light sensor simultaneously controls screen brightness and monitors lighting conditions, and the processor handles both test administration and parameter validation. This multi-functionality reduces overall system complexity while maintaining comprehensive monitoring capabilities
Data Source
AI summary
A mobile device and a method for testing an individual's vision are provided, the mobile device including a screen for displaying at least one test pattern, such as a smartphone or a tablet computer. A test of the individual's vision is performed using the test pattern displayed on the screen of the mobile device, in particular for testing visual acuity, contrast sensitivity and/or visual disturbances. Further, a parameter influencing the test result is evaluated before and/or during performing the test. The parameter includes at least one of the distance between the eye of the individual and the screen; the brightness at which the test pattern is displayed; and the ambient luminosity.