PURPOSE
To examine whether the early response of photic blink reflex (PBR) is spared in patients with Leber's hereditary optic neuropathy (LHON).
METHODS
Twenty-six patients with bilateral optic neuropathy (visual acuity < or = 0.1) and central scotomata were divided into LHON group with one of three mitochondrial DNA mutations at nucleotide position of 3460, 11778, or 14484 and non-LHON grou...
