Clinical trial No longer in our active list Interventional Ages 45 and up

Light therapy for improving symptoms in Parkinson's disease

Official title: Double-blind, Randomized Controlled Trial to Demonstrate Efficacy of Celeste® Specialized Phototherapy in Treating Parkinson's Disease.

Run by PhotoPharmics, Inc. · NCT04453033 · Data updated 2026-05-14

This study is no longer in our active list. It may have stopped recruiting or finished. The details below are as of 2026-05-14 and are kept for reference. Check ClinicalTrials.gov for its current status, or see similar studies below.

This study is testing whether a special light therapy device can help improve movement and daily life for people with Parkinson's disease while they continue their usual treatments.

Quick facts

Study typeInterventional
Ages45 Years and up
SexAll
Enrollment300 (estimated)
SponsorPhotoPharmics, Inc.
Industry-sponsored
Locations1 site (Rochester, New York)
Trial IDNCT04453033 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are individuals diagnosed with Parkinson's disease who have been responsive to dopaminergic medication and have stable medication regimens.

Probably not a fit

Patients with atypical Parkinsonian syndromes or those experiencing significant motor fluctuations that could interfere with study participation may not benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This pivotal study investigates the effectiveness of a specialized light therapy device in enhancing both motor and non-motor functions in patients with Parkinson's disease, in conjunction with their current medical treatments. The study employs a six-month double-blind, randomized controlled design, with participants using the device at home for one hour each evening. Assessments will be conducted through virtual clinic visits at baseline, week 13, and week 26, focusing on quality of life and motor function through established scales. The primary outcome measure is the Parkinson's Disease Questionnaire-39 Summary Index, while secondary endpoints include the Movement Disorders Society-Unified Parkinson's Disease Rating Scale.

Why it matters

Potential benefit: If successful, this therapy could significantly improve the quality of life and functional abilities of patients with Parkinson's disease.

How similar studies have gone: While light therapy has been explored in various contexts, this specific approach for Parkinson's disease is novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

Diagnosis of Parkinson's disease as determined by the study PI, in keeping with the UK PD Society Brain Bank Criteria for the Diagnosis of PD

Responsiveness to dopaminergic medication, as judged by the rater, and have been using treatment for at least the past 1 year

Relatively good eyesight as attested to by participants (Corrective lenses of at least 20/60)

Stable levodopa and other anti-PD medications for at least 28 days prior to screening -

Exclusion Criteria:

Diagnosis of an atypical Parkinsonian syndrome

Significant OFF state or bothersome dyskinesias that in the judgment of the rater, would interfere with participation in the study.

An anticipated need for a change in dopamine replacement therapy, concomitant medications, OTC/supplements, or other alternative therapies during the participant's involvement in the investigation

History of previous light therapy use for PD

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Where it's running

  • University of Rochester
    Rochester, New York, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
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Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.