Smartphone Flicker Fusion Test for Patients With Optic Disorders.

Validation of a Smartphone-Based Flicker Fusion Test

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT03475147

Enrollment

500

Registered

2018-03-23

Start date

2017-01-27

Completion date

2028-01-01

Last updated

2026-09-08

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Scotoma

Brief summary

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.

Detailed description

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.

Interventions

DEVICEeyeFusion

Smartphone app based flicker fusion test.

Study design

Allocation

NON_RANDOMIZED

Intervention model

PARALLEL

Primary purpose

SCREENING

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 80 Years

Healthy volunteers

Yes

Inclusion criteria

Control * Age matched 18-80 years of age. * Healthy normal controls with no known eye disorders.

Exclusion criteria

* Scotoma or any other ocular disorder Inclusion Criteria - Patients * Age 18-80 * Clinically associated scotoma

Design outcomes

Primary

Measure	Time frame	Description
Assess Validity of the test construct measuring flicker fusion thresholds.	1/1/2020	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.

Countries

United States

Contacts

PRINCIPAL_INVESTIGATORRandy Kardon, MD, PhD

University of Iowa

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 9, 2026