Starbright World was an online community for children with chronic illnesses established in 1995. Initially conceived as a 3D virtual world for use in hospitals, it was developed by Worlds Inc. for the Starbright Foundation. The 3D world―credited as one of the first applications of virtual reality in medicine―operated until 1997, when it was shut down due to technical issues. In 1998, it was replaced with a private social network, which is now defunct. Worlds Inc. would later launch lawsuits against several massively multiplayer online game companies, claiming that they held the rights to the concept of multiplayer virtual worlds based on patents obtained in relation to Starbright World.