Osteogenesis Imperfecta affects approximately one out of 15,000 people. In a nutshell, it's a genetic bone disorder that causes bones to break easily and grow abnormally due to a lack of collagen (the stuff that helps make up your bones, organs, hair, and fingernails). It also causes weak ligaments, hearing loss, breathing problems, and dental issues. The whites of OI people's eyes tend to have a blue tint, and they usually have a fairly triangularly shaped face and a "pigeon breasted" chest (meaning that the sternum sticks[...]