Custom foot orthotics (CFO) are prescription medical devices designed to stabilized and control the function of the foot and its alignment with the lower leg. CFO's are used to treat or prevent injury caused by excessive motion or a lack of motion in the foot and lower leg. Your prescription CFO device is tailored to your needs and activities. Your CFO is not just a piece of plastic. Chiropodists/podiatrists are trained to prescribe custom foot orthotics. The prescription CFO is based on the findings from the description your complaint, your medical history,  a detailed biomechanical examination of your foot and lower extremity, a gait analysis of your walking pattern. All of this gathered information is used to formulate a prescription.  Your prescription could include an addition such as an accommodation to relieve pressure that is causing callus on the bottom of your foot.  Some additions can encourage joint motion or prevent joint motion. Ultimately, the pres...