Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Photophobia clinical trials
4 of 4 indexed Photophobia trials are currently recruiting.
Corpus placement: #4,115 of 28,707 conditions by registered trial count.
4 US clinical trials · 4 currently recruiting · #4,115 of 28,707 conditions by registered trial count
Photophobia: 4 US clinical trials tracked, 4 recruiting.
Photophobia is the subject of 4 registered US clinical trials on ClinicalTrials.gov, 4 of them currently open to new participants. The most active sponsor is Randy Kardon, running 1 of these trials.
Enrollment posture brief
Registry condition photophobia
OPEN 4 | RECR 100% | LATE 0 | EARLY 0 | RANK #4115 | SPON 1
Volume-matched condition peers
Nearest open-share peer: Aortic Arch Aneurysm (100% recruiting · 5 trials)
Photophobia lists 4 open slots (100% of 4 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Photophobia on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Photophobia is recruiting above its size-band peers.
4 of 4 indexed trials (100%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
Open and recent trials
4 total, page 1 of 1
Comparison Between Spectacles and Contact Lenses
University of Oklahoma
NCT06905912
Objectively Diagnose and Monitor Treatment of Light Sensitivity
Randy Kardon
NCT03694626
Pilot Study of Neurofeedback for Photosensitivity in Mild Traumatic Brain Injury
VA Office of Research and Development
NCT06109909
Light Exposure, Migraine Outcomes, and Sleep Quality
Arizona State University
NCT07476053
Phase Distribution
Phase data not available
Top Sponsors
Named interventions
Most-linked intervention names on Photophobia records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Photophobia trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Photophobia page
4 registered trials, 4 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 4 Photophobia trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Randy Kardon sponsors the most Photophobia trials on record, review their full trial history before evaluating a specific study. See Randy Kardon's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Photophobia condition card totals 4 registered trials; most-linked intervention Biomedics55 Premier contact lenses, and Altius Tinted Contact Lenses; top US site state Oklahoma. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.