Scheduled for thoracic surgery for which post-operative opioid PCA is anticipated (Acute Pain group) OR currently treated with opioid therapy for fibromyalgia (Chronic Pain group)

18 years of age and older

Able to wear study eyeglasses for at least 4 hours per day

Agree to participate and provide written informed consent and HIPAA authorization

Opioid Sparing Potential of Light-Induced Analgesia

What this study is about