Introduction Human beings experience different challenges when interacting with their environment especially when they have personal obstacles. A past report by the U. S. Census Bureau categorized about 19% of the American population as having some degree of either physical or intellectual disability (Smart, 2001). Defining disability has not been easy due to the various opinions related to the understanding of the concept. Disability has been defined in general terms as any impairment or a problem in normal body structure that may hinder the normal functioning of the body (Orto & Power, 2007). Some of the impairments identified include that of hearing, sight, cognitive, emotional and motor challenges. These categories of impairments are further divided into sub-categories. Impairments affecting sight include blurred vision, color blindness, and blindness. World health Organization defines disability as a general term referring to impairments, limitation in the performance of activities, and restrictions when it comes to participating and interacting with the environment (Orto & Power, 2007). The paper discusses the various categories of disability and why it is important to define and categorize disabilities. Definition Disability has become a concern all over the world following the increasing awareness by the people. Definition of this concept has undergone significant transformation from the perspective of people with disabilities (PWDs) and the society at large. Disability has significant impact on the society due to the relationships that exists between the individual and the surrounding (Smart, 2001). Efforts to reduce ambiguity in the definition of disability have been made especially by western social-scientific researchers. Models from religious, medical, and social arenas/perspectives have been developed to help in the categorization of disability. The greatest challenge faced by people with disabilities is that impact of attempts to compartmentalize their capabilities (Orto & Power, 2007). Human beings are characterized by a natural desire to explain the unexplainable even if it is unpleasant. The need to define and categorize disabilities is therefore understandable. Most studies have recommended the detachment of the definition of a disability from the human experience. Disability has been known to affect every race, class of people, gender, ethnicity, nationality, and even across generations. This is due to the fact that it can at any time either accidently or due to infections of eyes, ears, or the nervous system (Tremain, 2008). Models of Disability and their Implications Researchers interested in understanding disability have used different models in the categorization of people with disability. Categorization is necessary for the investigators since they are able to separately analyze different cases of disability which has been to affect a large section of the society. The first is the deficit model which constitutes the people with physical or intellectual impairment (Smart, 2001). Deafness, blindness, paralysis or terminal illness fall in this category and differentiates them from the “normal” people. This model has been known to create a segregated/isolated society on the basis of capability. This contradicts efforts to create an integrated society despite the human divers