Orthotics are orthopedic devices designed to treat or adjust various biomechanical foot disorders. The best orthotics, however, are custom-tailored devices specifically crafted to meet the needs of a particular individual. This is done by making an impression of the foot called a cast. The impressions in the cast duplicate any misalignments in the foot. Specialists in an orthotic laboratory can then correct the misalignments with compensation and stabilization techniques. The finished orthotic is then placed in the patient's shoe and helps keep the foot in proper alignment.