Perception of Affordances and Obstacle Crossing in People With Parkinson's Disease and Healthy Adults

This study looks at how people with Parkinson's disease perceive and navigate obstacles while walking. Falling is a major risk for people with Parkinson's, and researchers want to better understand how the brain and body judge distances and obstacles — which could lead to better fall-prevention strategies. **You may be eligible if...** - You have been diagnosed with Parkinson's disease - You are able to walk, with or without a walking aid - You are an adult and able to give informed consent - You are stable enough on your current Parkinson's medications **You may NOT be eligible if...** - You have severe dementia or significant cognitive impairment that affects your ability to participate - You have serious vision problems not corrected by glasses - You have other neurological conditions besides Parkinson's - You have a recent injury or surgery that affects your walking Talk to your doctor to see if this trial is right for you.