A Light Exposure Tracker Designed to Improve Circadian Rhythms - Aim 1

October 9, 2025 updated by: Mariana Figueiro, Icahn School of Medicine at Mount Sinai

Light Exposure Tracker in Alzheimer's Disease.

The purpose of this research study is to investigate the relationship between reminder messages sent via text and compliance with a daily morning light intervention designed to advance the circadian clock. Twenty healthy adults will be recruited to participate in a randomized, cross-over study where daily messages are, or are not, provided to remind participants to carry out the intervention.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

20

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • New York
      • Menands, New York, United States, 12204
        • Light and Health Research Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • healthy adults over the age of 55
  • score of 25 or greater on MoCA

Exclusion Criteria:

  • Severe sleep apnea
  • restless leg syndrome
  • obstructing cataracts
  • macular degeneration
  • diabetic retinopathy
  • glaucoma
  • use of sleep medications
  • brain disease

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Light Googles plus reminder text messages
Participants use green light goggles for one hour each morning for two consecutive weeks and also receive a daily text message reminding them to wear the light goggles
Device: Light goggles
Green light goggles worn for 1 hour each morning for two weeks
Behavioral: Daily reminder test message
Participants will receive daily text message reminding them to use light goggles each morning
Experimental: Light Goggles alone
Participants use green light goggles for one hour each morning for two consecutive weeks
Device: Light goggles
Green light goggles worn for 1 hour each morning for two weeks

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Saliva samples for melatonin levels
Time Frame: Baseline and 2-weeks post-intervention for each Arm
Serial saliva samples will be collected to calculate dim light melatonin onset.
Baseline and 2-weeks post-intervention for each Arm

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Light exposure using the Speck
Time Frame: worn all 12 study weeks
The Speck light meter will be used to collect overall light exposure.The Speck light meter uses a photosensor to measure the amount of light study participants are exposed to each day.
worn all 12 study weeks
Sleep time using actigraphy
Time Frame: worn all 12 study weeks
Sleep time will be calculated from the actigraph. The wrist actigraph measures activity during the day and how well you sleep at night. The actigraph software will calculate the amount of time spent in bed sleeping.
worn all 12 study weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Icahn School of Medicine at Mount Sinai

Investigators

  • Principal Investigator: Mariana Figueiro, PhD, Ichan School of Medicine

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

February 22, 2024

Primary Completion (Actual)

August 15, 2024

Study Completion (Actual)

August 15, 2024

Study Registration Dates

First Submitted

April 4, 2024

First Submitted That Met QC Criteria

April 4, 2024

First Posted (Actual)

April 10, 2024

Study Record Updates

Last Update Posted (Estimated)

October 14, 2025

Last Update Submitted That Met QC Criteria

October 9, 2025

Last Verified

October 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • STUDY-22-01199

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

overall study results will be shared not individual.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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