Leber hereditary optic neuropathy is a research concept centered on a maternally inherited mitochondrial disorder characterized by acute or subacute bilateral vision loss resulting from retinal ganglion cell dysfunction and optic nerve atrophy. This field of study investigates the genetic mutations in mitochondrial DNA responsible for the condition, the cellular and molecular pathways leading to selective neurodegeneration, and the development of diagnostic and therapeutic strategies. Its significance lies in serving as a key model for understanding mitochondrial disease pathogenesis, the role of mitochondrial genetics in neurodegeneration, and the complexities of gene therapy and neuroprotection for inherited disorders.