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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Blue light-blocking glasses | Experimental | Participants will wear blue light-blocking glasses to evaluate whether sleep behaviors improve. |
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| Glasses with clear lenses | Placebo Comparator | Participants will wear glasses with clear lenses to serve as the control condition. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| 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. |
| Measure | Description | Time Frame |
|---|---|---|
| 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) |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| David Reichenberger, MS | Department of Biobehavioral Health | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Biobehavioral Health Building | University Park | Pennsylvania | 16802 | United States |
All processed IPD data that underlie results in a publication
Starting 1 year after the last publication based on collected data
Interested parties should contact David Reichenberger (reichenberger@psu.edu)
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| ID | Term |
|---|---|
| D005139 | Eyeglasses |
| ID | Term |
|---|---|
| D007909 | Lenses |
| D055096 | Optical Devices |
| D004864 | Equipment and Supplies |
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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.
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Participants will be told that both pairs of glasses block blue light.
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| Glasses with clear lenses | Device | Non-blue light-blocking glasses |
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