Functional Foot Orthotic: A support, brace, or splint used to support, align, prevent, or correct the function of movable parts of the body. Shoe inserts are orthotics that are intended to correct an abnormal or irregular walking pattern, by altering slightly the angles at which the foot strikes a walking or running surface.
Orthotics are prescription medical devices that you wear inside your shoes to correct biomechanical foot issues such as problems with how you walk, stand, or run. They can also help with foot pain caused by medical conditions such as diabetes, plantar fasciitis, bursitis, and arthritis. Orthotics might even help you avoid surgery to fix flat feet.