Subretinal Injection of Voretigene Neparvovec-rzyl in a Patient With RPE65-Associated Leber's Congenital Amaurosis.

Leber's congenital amaurosis (LCA) is a rare inherited retinal degeneration (IRD) that causes severe vision loss, nyctalopia, and nystagmus within the first few years of life. RPE65 gene mutations cause approximately 6% of LCA cases and have become the target for therapy since voretigene neparvovec-rzyl became the first U.S. Food and Drug Administration-approved gene therapy product for IRDs in 2017. The surgery involves pars plana vitrectomy with subretinal injection of a viral vector that carries a functional copy of the RPE65 gene. Intraoperative optical coherence tomography is a useful adjunctive tool to confirm the injection has reached the subretinal space.