Jean Lobstein described a disorder known today as osteogenesis imperfecta type I (also known as brittle bone disease) which is a hereditary, generalized connective tissue disorder.
He described a disorder known today as osteogenesis imperfecta type I, which is sometimes called "Lobstein's disease". Osteogenesis imperfecta (OI), also known as brittle bone disease, is a group of genetic disorders that mainly affect the bones. This disease is an hereditary, generalized connective tissue disorder characterized by bone fragility and a blue-gray sclerae of the eyes. 
