This research study will evaluate the safety and vision-sparing
efficacy of an investigational medication when adminstered four
times a day in the unaffected eye of patients who have visual
loss in on eye due to Leber's Hereditary Optic Neuropathy (LHON).
The aim of this study is to compare the safety and effectiveness
of two different medications in pediatric patients less than 6
years of age who have a diagnosis of glaucoma or elevated intraocular
pressure.