It seems like everybody is getting in on the "eye" treatment. Seven years ago when I had experimental surgery using retinal cells, it was unheard of.

There is the STEPS trials (Spheramine), where cells are taken from a donor eye. because of the method in which they are dellivered (micro-carrier beads), no immunosuppressants are needed.(That's a big word meaning you don't have to take anything to keep your body from rejecting these cells).
See www.titanpharm.com and look under Clinical Experiences.

There is also a stem cell retinal cell surgery done in China.
See www.stemcellschina.com and look under Patient Experiences.

And now, of course, this one in Arizona that uses autologous retinal cells (from the patient - not a donor). All are based on dopamine replacement. It's good to hear of so many people interested in treating PD.

Peggy