The Barthel Index is a standardized tool used to measure a person's ability to perform basic daily activities, such as eating, bathing, and dressing. It assesses functional independence in individuals, particularly those recovering from illness or injury. The index consists of 10 items, each scored based on the level of assistance required, with higher scores indicating greater independence. This assessment is commonly used in rehabilitation settings and among healthcare professionals to evaluate progress and plan care. It helps in understanding the impact of conditions like stroke or Parkinson's disease on a person's daily life, guiding treatment decisions and resource allocation.