An orthotic device is any foot pad, shoe or heel insert, or ankle brace. They may be purchased over-the-counter or as custom-molded, individually designed pieces. Orthotics are used to treat various conditions of the foot and ankle, and are often effective in relieving common complaints.
Orthotic devices may be recommended for several reasons, including aligning and supporting the foot or ankle, preventing, correcting or accommodating foot deformities, and improving the overall function of the foot or ankle.
Modified from the AAOS