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Impact Of Everyday Light Exposure Patterns On Health

NCT06908395 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 62

Last updated 2025-07-10

No results posted yet for this study

Summary

The aim of the present study is to characterize everyday light conditions of younger and older adults and to consider them in relation to cardiovascular, metabolic and psychological health. An ambulatory assessment approach will be used over 12 days, measuring physiological parameters and daily thoughts, behaviors and experiences of different age groups using wearable technologies (e.g., light sensors, activity trackers, continuous glucose monitors) and smartphone-based self-reports (e.g., mood, vitality).

At the beginning of the study, the degeneration of the lens and retina of the participants is objectively quantified by ophthalmologists. On the last two days, participants will spend one working day in dim light and another in bright light in randomized order under the same measurement protocol as before in order to experimentally assess their sensitivity to light and its health effects.

Conditions

  • Healthy Male and Female Subjects
  • Healthy Elderly

Interventions

OTHER

10-day ambulatory assessment in everyday life combined with two laboratory office days

Participants undergo a 10-day ambulatory assessment period wearing a continuous glucose monitor and a light logger as a necklace as well as completing short questionnaires through a smartphone app at regular intervals every day. On the first day, participants also undergo an extensive eye examination. Day 11 and 12 are spent in either dim or bright office lighting in randomized order.

Sponsors & Collaborators

  • RWTH Aachen University

    lead OTHER

Principal Investigators

  • Jan-Frieder Harmsen, PhD · RWTH Aachen University

Study Design

Allocation
RANDOMIZED
Purpose
OTHER
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2024-11-18
Primary Completion
2025-06-30
Completion
2025-06-30

Countries

  • Germany

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06908395 on ClinicalTrials.gov