 Reclining or tilt-in-space wheelchairs have seating surfaces which can be tilted to various angles.The original concept was developed by an orthotist, Hugh Barclay, who worked with disabled children and observed that postural deformities such as scoliosis could be supported or partially corrected by allowing the wheelchair user to relax in a tilted position.The feature is also of value to users who are unable to sit upright for extended periods for pain or other reasons.