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Light therapy and starting to walk

Researchers are testing light-emitting glasses to investigate whether changing daily body rhythms affects walking in Parkinson's.

Testing a treatment or activity · Study reference: IRCT20221014056170N1

Plain-language introduction written with AI from the registry; not independently checked by a clinician. Read the original details below ↓

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Start (reported date)
2023-01-21

Planned dates can move. A study finishing does not tell us when a paper will be published.

No results summary has been confirmed in the registry records we imported. See connected papers below; we keep checking after recruitment ends.

Changes we have recorded
  • 2026-10-11 — recruiting

These are dates we observed a change, not necessarily the dates it happened.

Papers connected to this study

No connected paper has been found yet. The tracker checks the growing library for study identifiers and registry-linked publications.

Who can join?

Ages 40 years to 75 years · Ask the team who can join

These are starting points, not the full rules. The research team can tell you whether the study is right for your situation.

Read all the rules for taking part

Sex eligibility reported by registry: both

Inclusion criteria: Age between 40 and 75 years. Idiopathic Parkinson's disease diagnosed by a neurologist. Being in stages 2 and 3 of the disease based on the Hoehn and Yahr scale. The ability to walk independently without the need for mobility aids (such as canes and walkers) for 30 minutes. Exclusion criteria: Presence of accompanying neurological disorders or history of other neurological disorders or major psychiatric illness. The presence of cognitive disorders affecting the study. Drug and alcohol addiction. The presence of vision and hearing problems, which affect the patient's ability to perform the test correctly. The presence of sensory problems in the legs or musculoskeletal disorders in the lower limbs. Suffering from chronic back pain and the presence of a prosthesis in the lower limb that limits the range of movements. Having severe tremors, a score greater than 2 on any of the items 3.15a to 3.17e on the clinical test (MDS-UPDRS). History of episodes of freezing of gait or dyskinesia History of implant surgery (Deep brain stimulation or DBS)
Full study name & original research details

Official study title

The effect of circadian rhythms modulation on anticipatory postural adjustments for gait initiation in people with Parkinson’s disease

Short title used by the registry

The effect of circadian rhythms modulation for gait initiation in people with Parkinson’s disease

Original description

Intervention: Intervention 1: Intervention group: They will wear glasses for two weeks. At the time of receiving the intervention (TEBL), the participants will be asked to wear glasses that shine active bright light through a light source consisting of 2 blue-green light emitting diodes (Re-Timer, 500 nm peak wavelength) to each eye. with irradiance of each diode set at the high setting: 506 Lux lm/m² and 230 µW/cm²) every night, two hours before going to sleep for one hour. At the time of receiving the placebo treatment (control), the subjects will wear glasses with the same appearance, except that a modified light source with 2 dim red light-emitting diodes (Re-timer with 2 dim red light-emitting diodes, 625 nm peak wavelength with irradiance of each diode set at the low setting: 135 Lux lm/m², 143 µW/cm²) will shine the light to the eyes. Intervention 2: Control group: Participants receiving the placebo glasses will be asked to wear the red light glasses every night (two hours before bedtime) for one hour. Primary outcome: Circadian rhythms function. Timepoint: Measurements will be taken before using the glasses and 14 days after using the glasses. Method of measurement: Examining the daily sleep pattern.;Anticipatory postural adjustment. Timepoint: Measurements will be taken before using the glasses and 14 days after using the glasses. Method of measurement: Gait analysis and Electromyography indicators.;Gait initiation. Timepoint: Measurements will be taken before using the glasses and 14 days after using the glasses. Method of measurement: Gait analysis and Electromyography indicators.;Severity of Parkinson's disease. Timepoint: Measurements will be taken before using the glasses and 14 days after using the glasses. Method of measurement: Unified Parkinson’s Disease Rating Scale or UPDRS.

Conditions reported: Parkinson disease. Parkinson's disease

Registry records for this study

Records are joined using registration identifiers. Titles alone do not establish that two studies are the same.

Study type
Interventional
Interventions
Intervention 1: Intervention group: They will wear glasses for two weeks. At the time of receiving the intervention (TEBL), the participants will be asked to wear glasses that shine active bright light through a light source consisting of 2 blue-green light emitting diodes (Re-Timer, 500 nm peak wavelength) to each eye. with irradiance of each diode set at the high setting: 506 Lux lm/m² and 230 µW/cm²) every night, two hours before going to sleep for one hour. At the time of receiving the placebo treatment (control), the subjects will wear glasses with the same appearance, except that a modified light source with 2 dim red light-emitting diodes (Re-timer with 2 dim red light-emitting diodes, 625 nm peak wavelength with irradiance of each diode set at the low setting: 135 Lux lm/m², 143 µW/cm²) will shine the light to the eyes. Intervention 2: Control group: Participants receiving the placebo glasses will be asked to wear the red light glasses every night (two hours before bedtime) for one hour.
Phases
N/A
Sponsor
Iran University of Medical Sciences
Start date reported by registry
2023-01-21 (reported)

Registry updated: Not reported · Status last verified by the registry submitter: Not reported

Registry records retrieved 2026-10-14 (UTC). Individual records may have older updates. Recruitment and eligibility must be confirmed with the study team.

Contact the research team

Public study contacts supplied to the registry. Ask whether recruitment is still open and what participation involves.

Laila Alibiglou · +98 21 8612 6135 · laila.alibiglou@gmail.com

Study locations

Site status can differ from overall study status. “Status not reported” means local availability needs confirmation. Remote participation and travel arrangements must be checked with the team.

Facility not reported

Iran (Islamic Republic of)

Status not reported

The original descriptions and participation rules come from the registry. Participation is voluntary and does not guarantee benefit.