"nBackground: Leber hereditary optic neuropathy (LHON) is an inherited form of bilateral optic atrophy leading to the loss of central vision.   The primary cause of vision loss is mutation in the mitochondrial DNA (mtDNA). however. unknown secon­dary genetic and/or epigenetic risk factors are suggested to influence its neuropathology. https://www.deliandiver.com/product-category/steam-mop-spares/