Kearns-Sayre Syndrome is a rare genetic disorder that affects multiple parts of the body, including the eyes, muscles, and nerves. While there are no direct synonyms for this disease, it is often classified as a mitochondrial disease, which is a group of disorders that are caused by mutations in the DNA of mitochondria. Other related conditions include Chronic Progressive External Ophthalmoplegia (CPEO), which also affects eye movement, and Mitochondrial Myopathy, which primarily affects the muscles. It is important to note that while these conditions may share similarities with Kearns-Sayre Syndrome, they each have distinct symptoms, causes, and treatments.