Light Sleep: Screen Use and Sleep Health

NCT05342662 | Completed

• 1 other identifier: STUDY00019746
• Study Type: interventional
• Target: 34
• Locations: 1 country
• Sites: 1

Brief Summary

The Phone Sleep Study is being done to find out whether wearing blue light-blocking glasses in the evening improves subsequent sleep. This is a 21-day study and participants will be asked to wear a sleep-monitoring "actiwatch", a heart tracker, and an activity monitor, as well as to provide screenshots of participants' smartphone's screen time app for three weeks. Participants will also be asked to wear a blood pressure cuff on their arm for three days during each week, for a total of nine days.

Conditions

Glasses

Outcome Measures

Primary Outcomes (3)

• Sleep onset

  Midnight-centered clocktime of when participant falls asleep at night

  Throughout the duration of the study (~3 weeks)

• Sleep midpoint

  Midnight-centered clocktime denoting the middle of the nocturnal sleep episode

  Throughout the duration of the study (~3 weeks)

• Total sleep time at night

  Length of time spent asleep during the night, excluding time spent awake throughout the sleep episode

  Throughout the duration of the study (~3 weeks)

Study Arms (2)

Blue light-blocking glasses

EXPERIMENTAL

Participants will wear blue light-blocking glasses to evaluate whether sleep behaviors improve.

Device: Blue light-blocking glasses

Glasses with clear lenses

PLACEBO COMPARATOR

Participants will wear glasses with clear lenses to serve as the control condition.

Device: Glasses with clear lenses

Interventions

Blue light-blocking glasses DEVICE

Participants will be randomly assigned to wear either blue light-blocking glasses or glasses with clear lenses during the second week of the study. During the third week, participants will be assigned to wear the opposite pair of glasses.

Also known as: Swanwick Night Swannies

Blue light-blocking glasses

Glasses with clear lenses DEVICE

Non-blue light-blocking glasses

Also known as: Swanwick glasses

Glasses with clear lenses

Eligibility Criteria

• Age: 18 Years - 29 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Fluent English speaker and reader
• Capable of providing one's own informed consent
• Age 18 to 29 years old
• Healthy, sighted individuals
• Own an iOS smartphone (iPhone)
• Willingness to update smartphone to access the current version of the Screen Time or StayFree application, depending on smartphone operating system
• Willingness to participate in surveys, wear health monitoring devices, and provide screenshots of their smartphone's screentime application throughout the entire study

You may not qualify if:

• Younger than 18 or older than 29 years
• Individuals who are blind or wear corrective lenses
• Taking prescribed medications that affect sleep
• Recent shift work
• Sleep disorder diagnosis or any cardiovascular disease

Sponsors & Collaborators

• Penn State University: lead

Study Sites (1)

Biobehavioral Health Building

University Park, Pennsylvania, 16802, United States

Location

MeSH Terms

Interventions

Eyeglasses

Intervention Hierarchy (Ancestors)

Lenses; Optical Devices; Equipment and Supplies

Study Officials

• David Reichenberger, MS

  Department of Biobehavioral Health

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Masking Details: Participants will be told that both pairs of glasses block blue light.
• Purpose: OTHER
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Model Details: Participants will be randomly assigned to wear either blue light-blocking glasses or glasses with clear lenses during the second week of the study. During the third week, participants will be assigned to wear the opposite pair of glasses. Sleep and wake behaviors are the primary study outcome.

Study Record Dates

• First Submitted: April 6, 2022
• First Posted: April 25, 2022
• Study Start: November 23, 2022
• Primary Completion: September 5, 2023
• Study Completion: September 5, 2023
• Last Updated: September 13, 2023

Record last verified: 2023-09

Data Sharing

• IPD Sharing: Will share
• Shared Documents: ANALYTIC CODE
• Time Frame: Starting 1 year after the last publication based on collected data
• Access Criteria: Interested parties should contact David Reichenberger (reichenberger@psu.edu)

Locations

US (1)