Orthotics vary in their purpose and design depending on whether they are meant to provide increased support or cushioning. Overall the purpose is to redistribute the pressure areas on your feet to alleviate stress on the bones, ligaments or muscles of your feet and to improve biomechanics of walking, running and jumping. Improper foot alignment can lead to a wide variety of foot, ankle, knee, lower limb and back problems. By improving this alignment the body is able to function with less stress on the anatomical structures holding you together. Much like eye glasses, orthotics work to improve function and prevent injury and pain when you’re wearing them, but they do not change the anatomy of your foot.