An interventional study of eyeFusion in Scotoma, sponsored by Randy Kardon. Active, not recruiting at 1 site in United States. Open to participants aged 18 Years to 80 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-09-08.
Sponsored by Randy Kardon · Not applicable, Interventional, and Screening
The purpose of this project is to validate a quick, easy-to-use and administer smartphone flicker fusion test. The app (called eyeFusion) can potentially be used to easily and quickly collect critical flicker fusion measurements on patients admitted with optic disorders as part of the clinical care process.
The smartphone app developed is a flicker fusion that presents the subject with a series of stimuli consisting of a flickering pattern of bars above or below a static rectangle. For each stimulus presentation, the user has to tap the region that is flickering. The duration of the app is less than 2 minutes.
This study will assess the validity of the test construct in measuring flicker fusion thresholds, and serve as a foundation for further iterative designs of the app and future validation and characterization studies.
Randy Kardon is the lead sponsor of 4 studies on the registry; 2 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Inclusion Criteria:
Control
Exclusion Criteria:
Inclusion Criteria - Patients
Exclusion Criteria - Patients
-Any other ocular disorder
Healthy normal controls with no known eye disorders age 18-80.
Device: eyeFusion
Scotoma subjects aged 18-80.
Device: eyeFusion
Smartphone app based flicker fusion test.
Assess Validity of the test construct measuring flicker fusion thresholds.
The smartphone app developed is a flicker fusion that presents the subject with a series of stimuli consisting of a flickering pattern of bars above or below a static rectangle. The study will assess the validity of the test construct in measuring flicker fusion thresholds, and serve as a foundation for further iterative designs of the app and future validation and characterization studies.
Time frame: 1/1/2020
Plan to share: No
No publications or documents are linked to this record.
This study is active, not recruiting, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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Scotoma
Randy Kardon