Impairment concerns any loss or deviation of physiological, neurological or anatomical structure or function of an organ or body part.
Moreover, it refers to any physiological disorder or condition, cosmetic disfigurement, or anatomical loss affecting one or more of the body's multiple systems, including the special sense organs, neurological, musculoskeletal, respiratory, cardiovascular, reproductive, digestive, genito-urinary, hemic and lymphatic, skin and endocrine systems. Example is Aphakia which is a visual Impairment
Impairment can also be any mental or psychological disorder, such as mental retardation, organic brain syndrome, emotional or mental illness, and specific learning disabilities.
List of books: Impairment