Seeing the World Through Assorted Glasses
| Status: | Active, not recruiting |
|---|---|
| Conditions: | Insomnia Sleep Studies |
| Therapuetic Areas: | Psychiatry / Psychology |
| Healthy: | No |
| Age Range: | 18 - 50 |
| Updated: | 4/21/2016 |
| Start Date: | June 2015 |
| End Date: | July 2016 |
Seeing the World Through Assorted Glasses (SWAG)
The purpose of the study is to test the use of amber glasses at night as a method to block
blue light from the eye, allowing the brain to produce a dim-light melatonin onset. The
investigators hypothesize that blue-blocking will produce measurable benefits in
subjectively and objectively rated sleep quality and mood as well as salivary melatonin
levels during the night.
blue light from the eye, allowing the brain to produce a dim-light melatonin onset. The
investigators hypothesize that blue-blocking will produce measurable benefits in
subjectively and objectively rated sleep quality and mood as well as salivary melatonin
levels during the night.
Participants will complete a self-report battery containing measures of sleep quality,
morningness-eveningness chronotype, and mood. Participants will then wear a wrist-worn
accelerometer for 14 days to objectively record activity level and sleep quality.
Participants will also fill out a daily sleep log and short self-report measures assessing
sleep and mood. On days 4-7 and 11-14 of the study the participants will wear either amber
or placebo control lenses prior to sleep onset in a randomized crossover design (i.e.,
participants will be randomized to wear either amber lenses or placebo lenses for the first
part of the protocol and then switch to wear the opposite lenses for the second part of the
protocol). Participants will spend nights 7 and 14 of the study in a sleep laboratory in
order to obtain hourly melatonin samples and wear a wrist sleep monitor to non-invasively
and objectively measure sleep state and quality using peripheral arterial tone and oxygen
perfusion.
morningness-eveningness chronotype, and mood. Participants will then wear a wrist-worn
accelerometer for 14 days to objectively record activity level and sleep quality.
Participants will also fill out a daily sleep log and short self-report measures assessing
sleep and mood. On days 4-7 and 11-14 of the study the participants will wear either amber
or placebo control lenses prior to sleep onset in a randomized crossover design (i.e.,
participants will be randomized to wear either amber lenses or placebo lenses for the first
part of the protocol and then switch to wear the opposite lenses for the second part of the
protocol). Participants will spend nights 7 and 14 of the study in a sleep laboratory in
order to obtain hourly melatonin samples and wear a wrist sleep monitor to non-invasively
and objectively measure sleep state and quality using peripheral arterial tone and oxygen
perfusion.
Inclusion Criteria:
- Good physical health
- Proficiency in written and spoken English
- Reported average total sleep time <9 hours (so nights spent in sleep lab will not
result in sleep deprivation)
Exclusion Criteria:
- Taking regular medication affecting sleep and/or mood
- Travel across more than two time zones within the past month
- Smoke > 5 cigarettes per day
- Excessive caffeine use (>2 cups at one time or >500 mg daily)
- No current Axis I Diagnostic and Statistical Manual of Mental Disorders (DSM-5)
Disorder
- No current use of street drugs
- No history of sleep disorder/bipolar disorder/psychosis/seizure disorder/chronic
medical condition
- Night shift work within the past 2 months
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