DISABILITY: Lack of ability to perform an activity within the normal range resulting from impairment.
1. [Unilateral involvement]: With minimal (or) no func impairment
2. [Bilateral involvement]: Without impairment of Balance
3. [Mild disability]: Restricted in his activities but can lead independent life
4. [Severe disability]: Able to stand & walk unaided but is markedly handicapped
5. [Handicap]: Confinement to bed (or) wheel chair