http://www.colorglasses.com/Color-Therapy-Medical-Benefits/Parkinsons-Disease-Blue-Glasses/
“Looking through a blue plastic sheet or wearing blue glasses or glasses with blue lenses may help relieve the symptoms of dyskinesia caused by Parkinson’s Disease, a neurological disorder. Dyskinesia may also appear after long term use or high dosage of drugs used to treat psychosis such as schizophrenia.”