Wikipedia
Rheopheresis
Rheopheresis is a process to change the viscosity of blood by filtering blood to remove some components such as fibrinogen, von Willebrand factor and LDL cholesterol.
It is experimental treatment for dry age-related macular degeneration (AMD) and Acute Ischemic Stroke
Some trials have given disappointing results for AMD but two German studies (72 and 43 patients) reported good results in 2009