Many people, including physicians, have thought that angled shoe inserts may transfer some of the load away from the medial compartment thus reducing knee pain in osteoarthritis. However, according to a British meta-analysis these lateral wedge insoles do not appear to ease this pain beyond a placebo effect. If patients expected a benefit, they were more likely to report improvement from the intervention.
PositiveTip: Save your hard earned money and avoid spending for lateral wedge insoles, according to this study.