Beacon enables at-home cognitive screening.
The only device to support self-measurement of the critical flicker frequency (CFF) digital biomarker.
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Device and app.
The Beacon device was developed and iterated on based on years of research.
The Beacon device is used in conjunction with a smartphone app.
Read the science.
Li, Richard, et al. "Deploying and Examining Beacon for At-Home Patient Self-Monitoring with Critical Flicker Frequency." Proceedings of the 2025 CHI Conference on Human Factors in Computing Systems. 2025.
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Vutien, Philip, et al. "Evaluating a Novel, Portable, Self-Administrable Device ("Beacon") that Measures Critical Flicker Frequency as a Test for Hepatic Encephalopathy." Official Journal of the American College of Gastroenterology. 2023.
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Karkar, Ravi, et al. "Beacon: Designing a Portable Device for Self-Administering a Measure of Critical Flicker Frequency." Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies. 2018.
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Meet the team.
Richard Li, PhD
Postdoctoral Fellow in Computer Science & Engineering
University of Washington
Philip Vutien, MD, MS
Assistant Professor of Medicine
University of Washington
Sabrina Omer, BS
Research Coordinator at C-LIFE
University of Washington
Michael Yacoub, MS
Research Coordinator at C-LIFE
University of Washington
George Ioannou, MD, MS
Director of Hepatology
Veteran Affairs Puget Sound
Professor of Medicine
University of Washington
Ravi Karkar, PhD
Assistant Professor of Information and Computer Sciences
University of Massachusetts Amherst
Sean Munson, PhD
Professor of Human Centered Design & Engineering
University of Washington
James Fogarty, PhD
Professor of Computer Science & Engineering
University of Washington