Knobloch Syndrome, also known as retinal detachment-occipital encephalocele syndrome, is related to knobloch syndrome 2 and knobloch syndrome 1, and has symptoms including seizures and unspecified visual loss. An important gene associated with Knobloch Syndrome is COL18A1 (Collagen Type XVIII Alpha 1 Chain). Affiliated tissues include eye and retina, and related phenotypes are myopia and retinal detachment