Middle-aged or elderly men are often affected and present with painless, slowly progressive, color distortion and visual loss in both eyes. The mechanism is unclear, but this has been reported to be more common in individuals who are already suffering from malnutrition. Hereditary optic neuropathies
The inherited optic neuropathies typically manifest asa  symmetric bilateral central visual loss. Optic nerve damage in most inherited optic neuropathies is permanent and progressive. Lebers hereditary optic neuropathy (LHON) is the most frequently occurring mitochondrial disease, and this inherited form of acute or subacute vision loss predominantly affects young males. LHON usually presents with rapid vision loss in one eye followed by involvement of the second eye (usually within months). Visual acuity often remains stable and poor (around or below 20/200) with a residual central visual field defect. Patients with the 14484/ND6 mutation are most likely to have visual recovery. Dominant optic atrophy is an autosomal dominant disease caused by a defect in the nuclear gene OPA1. A slowly progressive optic neuropathy, dominant optic atrophy, usually presents in the first decade of life and is bilaterally symmetrical. Examination of these patients shows loss of visual acuity, temporal pallor of the optic discs, centrocecal scotomas with peripheral sparing, and subtle impairments in color vision. Behrs syndrome is a rare autosomal recessive disorder characterized by early-onset optic atrophy, ataxia, and spasticity. Berk–Tabatznik syndrome is a condition that shows symptoms of short stature, congenital optic atrophy and brachytelephalangy. This condition is extremely rare.
Renova may refer to:

Cities, towns, townships etc. Renova, Mississippi
Renova: an unincorporated settlement in Dexter Township, Minnesota

Brand names
Renova (brand), a Portuguese paper products company
Trade name of tretinoin, a treatment for acne and other skin conditions
Renova Group, a Russian holding company controlled by Viktor Vekselberg

Other
FK Renova, football club
Renova (fish), a killifish genus