Upper Extremity Rehabilitation With Virtual Reality in Parkinson's Disease Patients

This study tests whether a virtual reality (VR) rehabilitation program can improve arm and hand movement, balance, and quality of life in people with Parkinson's disease. **You may be eligible if...** - You have been diagnosed with Parkinson's disease by a neurologist - Your Parkinson's is at Hoehn-Yahr stage 3 or below (moderate severity) - You are on stable Parkinson's medication - You can walk independently - You have full range of motion in your shoulder and elbow **You may NOT be eligible if...** - You have another neurological condition in addition to Parkinson's disease - You score below 21 on the Montreal Cognitive Assessment (moderate or severe cognitive impairment) - Your medication dose has changed in the last month - You have severe vision or complete hearing loss in both ears - You have a joint or rheumatologic condition that affects your arm function - You are experiencing severe tremors or uncontrolled movements due to medication timing - You fail a specific eye test (Titmus butterfly test) Talk to your doctor to see if this trial is right for you.