Near-infrared Light-emitting Diode (NIR-LED) Therapy for Leber's Hereditary Optic Neuropathy (LHON)

Inclusion Criteria: * Sex - male and female. Men are affected with visual loss more frequently than women, with a male predominance of \~85%. A minimum of 25% of men and 5% of women at risk for LHON experience visual loss. * Age - 18 years or older. The onset of visual loss typically occurs between the ages of 15 and 35 years, but otherwise classic LHON has been reported in many individuals both younger and older, with a range of age at onset from 2 to 80 years. * Diagnosis of LHON or a carrier of the gene mutation. Patient must be evaluated by molecular confirmation, with the 11778 and other mutations of Leber's Hereditary Optic Neuropathy stratified in later data analysis. * Able \& willing to provide informed consent Exclusion Criteria: * Has an optic nerve disease other than LHON. * Significant renal disease, defined as a history of chronic renal failure requiring dialysis or kidney transplant. * Participation in an investigational trial within 30 days of NIR-LED treatment that involved treatment with any drug that has not received regulatory approval at the time of study entry. (Note: subjects cannot receive another investigational drug while participating in the study during the first 6 months.) * Major surgery within 28 days prior to participation or major surgery planned during the next 6 months. Major surgery is defined as a surgical procedure that is more extensive than fine needle biopsy/aspiration, placement of a central venous access device, removal/biopsy of a skin lesion, or placement of a peripheral venous catheter.