Using Critical Flicker Fusion to Distinguish Causes of Vision Loss


About this study

The goal of this study is to evaluate the efficacy of the critical flicker fusion device in distinguishing different kinds of optic neuropathy. 

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

  • Patients 18 years or older with visual acuity between 20/20 and 20/200.

Exclusion Criteria: 

  • Subjects with high standard deviation on the testing, which indicates unreliable results

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

John Chen, M.D., Ph.D.

Closed for enrollment

Contact information:

John Chen M.D., Ph.D.


More information


Publications are currently not available

Mayo Clinic Footer