Torsional deformities of long bones such as the femur and tibia are also encountered, among others. Children may develop scoliosis before the age of 10 – estimated prevalence of scoliosis in children with CP is between 21% and 64%. Higher levels of impairment on the GMFCS are associated with scoliosis and hip dislocation. Scoliosis can be corrected with surgery, but CP makes surgical complications more likely, even with improved techniques. Hip migration can be managed by soft tissue procedures such as adductor musculature release. Advanced degrees of hip migration or dislocation can be managed by more extensive procedures such as femoral and pelvic corrective osteotomies. Both soft tissue and bony procedures aim at prevention of hip dislocation in the early phases or aim at hip containment and restoration of anatomy in the late phases of disease. Equinus deformity is managed by conservative methods especially when dynamic. If fixed/static deformity ensues surgery may become mandatory.Growth spurts during puberty can make walking more difficult for people with CP. Eating
Due to sensory and motor impairments, those with CP may have difficulty preparing food, holding utensils, or chewing and swallowing. An infant with CP may not be able to suck, swallow or chew. Gastro-oesophageal reflux is common in children with CP. Children with CP may have too little or too much sensitivity around and in the mouth.
Retinal correspondence is the inherent relationship between paired retinal visual cells in the two eyes. Images from one object stimulate both cells, which transmit the information to the brain, permitting a single visual impression localized in the same direction in space. Types
Normal retinal correspondence (NRC) is a binocular condition in which both foveas work together as corresponding retinal points, with resultant images fused in the occipital cortex of the brain.Abnormal retinal correspondence (ARC), also called Anomalous retinal correspondence  is binocular sensory adaptation to compensate for a long-standing eye deviation (i.e. strabismus). The fovea of the straight (non-deviated) eye and non-foveal retinal point of the deviated eye work together, sometimes permitting single binocular vision. See also
Bagolini Striated Glasses Test
Binocular vision
Haploscope
Stereopsis
Orthoptist

References
External links
Bhola, Rahul. Binocular Vision. University of Iowa Department of Ophthalmology & Visual Sciences: EyeRounds.org. January 23, 2006.
International Orthoptics Association
Orthoptics Association of Australia