MedTrace Logo

Evning Exposure to Computer Screen Disrupts Sleep, Attention and Biological Rhythms

NCT02957383 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 19

Last updated 2016-11-08

No results posted yet for this study

Summary

Light exposure is on the rise in recent years. In large part because of unintentional illumination from screens that emit light directly into the eyes. Millions of computers, tablets, televisions, and smart-phones are sold worldwide every month and the usage time of these devices is increasing constantly. Today, people are exposed to ongoing light exposure from these device screens, emitting short wave length (SWL) during day and night hours, whether as active or passive users. In sum, artificial light at night (ALAN) seem to affect human circadian rhythmicity (melatonin and thermoregulation) and sleep, with two major factors. First, wavelength of light, with SWL being most detrimental to sleep and rhythms, when compared to LWL (Brianard et al., 2001). Second, a dose-response relationship exists between increasing light intensity and poorer sleep/circadian rhythms (Brianard et al., 1988; West et al., 2011).

Based on existing knowledge, we hypothesize that when compared to long wavelength LWL illumination, short wavelength SWL illumination from computer screen will have a more damaging effect on melatonin (MLT) production and secretion, interfering body temperature regulation and affecting sleep quality, efficiency and sleep architecture. In addition, we hypothesized that intensity of the screen illumination will play another important factor on these outcomes, we assume that high intensity compared to low intensity will have more damaging effect on: melatonin, thermoregulation and sleep.

Conditions

  • Sleep Disorder

Interventions

OTHER

Wavelength

wavelength at two levels: short (SWL)-485 nm (13500k) and long (LWL)-620 nm (4250k)

OTHER

Intensity

Luminance at two levels: low - 80 lux (35mw/cm2) and high - 350 lux (160mw/cm2

Sponsors & Collaborators

  • Assuta Medical Center

    lead OTHER

Principal Investigators

  • Lilach Kemer, Dr · Assuta Medical Center

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
SINGLE
Model
FACTORIAL

Eligibility

Min Age
20 Years
Max Age
65 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2015-07-31
Primary Completion
2016-03-31
Completion
2016-08-31

More Related Trials

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 NCT02957383 on ClinicalTrials.gov