Vision rehabilitation (often called vision rehab) is a term for a medical rehabilitation in order to improve vision or low vision. In other words, it is the process of restoring functional ability and improving quality of life and independence in an individual who has lost visual function through illness or injury. Most visual rehabilitation services are focused on low vision, which is a visual impairment that cannot be corrected by regular eyeglasses, contact lenses, medication, or surgery. Low vision interferes with the ability to perform everyday activities. Visual impairment is caused by various factors including brain damage, vision loss, and others. There are various types of vision rehabilitation techniques available, most which center on neurological and physical approaches.