Disability refers to any restriction or lack of ability (resulting from an impairment) to perform an activity in the manner or within the range considered normal for a human being. Impairments associated with disabilities may be physical, mental, or sensory motor impairment such as partial or total blindness, low vision, partial or total deafness, oral defect, having only one hand/no hands, one leg/no legs, mild or severe cerebral palsy, retarded, mentally ill, mental retardation and multiple impairment. Data on disability will enable planners to prepare plans for rehabilitation, education, development, and preventive programs.