This study is researching experimental (study) drugs called pozelimab and cemdisiran. The study is focused on participants who have Geographic Atrophy (GA) caused by Age-related Macular Degeneration (AMD). Geographic atrophy is a medical term that refers to later-stage cases of AMD which is an eye condition affecting central vision (what one sees straight ahead).
The purpose of this study is to evaluate the progression rate of Geographic Atrophy in eyes of patients treated with cemdisiran alone or in combination with pozelimab compared to those treated with placebo.
The study is looking at several other research questions, including:
* What side effects may happen from taking the study drug(s) * How much study drug(s) are in the blood at different times * Whether the body makes antibodies against the study drug(s) (which could make the study drug(s) less effective or could lead to side effects)
Study eye with diagnosis of GA of the macula secondary to AMD as described in the protocol
Total GA area in the study eye measuring between ≥2.5 mm² and ≤17.5 mm² as described in the protocol
BCVA of 55 letters or better using ETDRS charts (20/80 Snellen equivalent) in the study eye as described in the protocol
Sufficiently clear ocular media, adequate pupillary dilation and fixation to permit quality fundus imaging in the study eye as described in the protocol
GA in either eye due to causes other than AMD, such as Stargardt disease, cone rod dystrophy or toxic maculopathies like hydroxychloroquine maculopathy
History or current evidence of Macular Neovascularization (MNV) and/or exudation or Peripapillary Choroidal Neovascularization (PPCNV) in either eye as described in the protocol
Prior or current Intravitreal (IVT) treatment of any kind for any indication in study eye or fellow eye, except approved or investigational IVT complement inhibitor therapy or anti-VEGF therapy, as long as last dose was ≥6 months prior to randomization
Prior intraocular surgery except cataract extraction or minimally invasive glaucoma surgery in study eye as long as date of these procedures was ≥3 months prior to randomization