This study will also evaluate the ability of AMDX-2011P to identify α-syn in the retina of patients with Parkinson's disease and to identify the protein TDP-43 in the retina of patients with ALS. This study will help to evaluate the ability to detect these protein deposits for the purpose of diagnosing PD and ALS.~To determine the safest dose, participants will receive different amounts of the investigational retinal tracer. The first group of participants taking part in the study will receive a low dose of AMDX-2011P. If no major side effects occur, the dose will be increased for the next group of participants.~Participants will receive a 1 time intravenous injection.~This study plans to enroll approximately 24-36 subjects with active disease (PD or ALS). Participants will be age 18 and older.
The purpose of this research study is to assess safety and tolerability of a single intravenous (given through a vein) dose of the investigational retinal tracer AMDX-2011P in patients with neurodegenerative diseases (Parkinson's disease and ALS).