Efficacy Study of Light Therapy as an Adjunctive Treatment for Parkinson's Disease

Light treatment was originally employed in Parkinson's disease (PD) to determine if it might be effective in treating co-existing symptoms of depression and insomnia. However, a preliminary double-blind study as well as other studies reported significant improvement in both motor and co-existing Parkinsonian symptoms. As of yet, no long term double blind study has validated these findings. This study will use a double-blind design to evaluate the safety and efficacy of a non-invasive light therapy device to be used with ongoing pharmacotherapy for PD, over a six month treatment period.