The SleepWell Study - Chronotherapeutic Intervention to Improve Sleep Following ACS

BLT will be administered via a Luminette 3 light therapy visor. The Luminette 3 is a visor worn above the eyes containing light emitting diode (LEDs) emitting a blue-enriched white light reflecting to the retina at 1,000 lux via a holographic system in order to ensure correct penetration into the eye without impeding vision. This range of light and intensity is sufficient to synchronize the circadian clock.

BLB will be administered via orange lenses that filter out short-wavelength blue light, while allowing the other visible spectrum light to pass. The BLB lenses result in a reduction in melanopic irradiance (i.e., the light that affects sleep) of about 85%. The BLB lenses only make the overall light environment about 30% dimmer. Therefore, the BLB lenses are effective in blocking out most of the blue light in the visible environment that impacts sleep, but do not result in drastic overall dimming/darkening of the light environment.

The sleep hygiene education will consist of watching a sleep education video (background on the regulation of sleep, the impacts of insufficient sleep on mental and physical health, etc.) and a sleep hygiene video (providing overview of sleep hygiene approaches).