Morning Light Treatment at Home to Reduce PTSD Symptoms

The Retimer light device in this study is a commercially-available wearable light device. It permits ambulation while receiving light from LEDs positioned below the eyes. The LEDs emit green light (\~500nm, 230 µW/m2, 500 lux), close to the peak sensitivity of circadian photoreceptors.

The Retimer device has been dimmed to reduce the light intensity to a level that will not shift circadian timing.