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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Enrollment
34
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.
Non-blue light-blocking glasses
Biobehavioral Health Building
University Park, Pennsylvania, United States
Sleep onset
Midnight-centered clocktime of when participant falls asleep at night
Time frame: Throughout the duration of the study (~3 weeks)
Sleep midpoint
Midnight-centered clocktime denoting the middle of the nocturnal sleep episode
Time frame: 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
Time frame: Throughout the duration of the study (~3 weeks)
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