Osteogenesis Imperfecta (OI), also known as brittle bone disease, is a group of genetic disorders that mainly affect the bones. It results in bones that break easily. Its severity may be mild to severe. Other symptoms may include a blue tinge to the whites of the eye, short height, loose joints, hearing loss, breathing problems and problems with the teeth. Physiotherapy is aimed to strengthen muscles and improve motility in a gentle manner, while minimizing the risk of fracture, and the use of support cushions to improve posture.