Eye'sTest vs Spencer Vision Guard

Thank you — more than 120,000 people have used this app. Take a 10-second vision check on your iPhone's high-resolution display every day, and keep an eye on how much screen work is straining your eyes. [Features] - The Landolt C ring rotates randomly, so you can test as many times as you like without memorizing the pattern - High-resolution displays are supported: check your visual acuity up to 2.0 - Acuity levels from 0.01 to 0.09 are checked in 0.01 steps - At 20 cm from the screen, you can measure from 0.02 to 0.4 - At 30 cm: 0.03 to 0.6 / at 40 cm: 0.02 to 0.8 / at 50 cm: 0.02 to 1.0 - At 60 cm: 0.02 to 1.2 / at 70 cm: 0.02 to 1.4 / at 80 cm: 0.02 to 1.6 - At 90 cm: 0.02 to 1.8 / at 100 cm: 0.02 to 2.0 - The rings are drawn following the international Landolt C standard formula as closely as possible - For measurements at 60 cm or more, we recommend two people: one holds the device, the other answers - Even without Premium, your last 7 records are kept on your device (never sent anywhere). Premium keeps up to 365 records with charts and CSV export - Ad-free [How to use] - Launch the app and set the distance from your eyes to the screen (10 cm to 100 cm) - Close one eye and tap the arrow button that matches the direction of the opening in the "C" [Notes] - The results of this app cannot be used as official health examination results - Stop using the app immediately if you feel unwell

Vision Guard: Clinical Research Vision Monitoring Vision Guard is a research application designed to support clinical trials in ophthalmology by enabling remote vision monitoring for patients. The app is currently in a validation phase, partnering with multiple clinics to assess the accuracy of remote vision testing compared to traditional clinical measurements. FEATURES • Landolt C Vision Test: Standardized visual acuity testing • Remote Data Collection: Enables vision monitoring from patient locations • Clinical Validation: Compares results with gold standard BCVA measurements • Secure Platform: Encrypted data transmission for research teams • Multi-Clinic Partnership: Validating methodology across partner clinics PURPOSE Vision Guard administers the Landolt C test, a recognized method for measuring visual acuity. The app collects vision data from volunteers, with results validated against traditional in-clinic BCVA measurements to assess the reliability of remote testing approaches. RESEARCH STATUS Currently in controlled validation with volunteer participants and partner clinics. The goal is to determine if remote vision testing can provide reliable data comparable to traditional clinical measurements. IMPORTANT NOTES • Research and clinical trial use only • Requires authorized clinic credentials for access • Not for diagnostic or treatment purposes • Results must be interpreted by qualified healthcare professionals • Limited availability during validation phase FOR CLINICAL RESEARCH TEAMS Vision Guard offers a platform for collecting vision data from clinical trial participants remotely, potentially reducing in-person visit frequency while maintaining research data quality. Designed to support ongoing ophthalmology research. Privacy & Data Security Patient data is encrypted in transit and accessible only to authorized research team members with proper credentials. --- This application is for research purposes and requires authorized access. Not a replacement for professional medical care.