Investigating Geographic Atrophy Insights (i-GAIN) Natural History Study

Inclusion Criteria: 1. Clinical diagnosis of bilateral GA due to AMD as confirmed by fundoscopy and imaging at Screening 2. GA lesion sizes of ≥ 1.25 mm2 to ≤ 17 mm2 (approximately 1-7 disc diameters) in at least one eye as per Central Reading Center 3. Willing and able to provide written informed consent 4. Male or female aged 65 years and over Exclusion Criteria: 1. History of neovascular (wet) AMD or presence of neovascular (wet) AMD in either eye confirmed by fundoscopy at screening and/or any pre-existing retinal imaging 2. History of intravitreal (IVT) injection in the study eye. Note: Intravitreal treatment with pegcetacoplan (Syfovre®) and avacincaptad pegol (IzervayTM) if approved within the participant's country of origin AND if deemed necessary by the Principal Investigator (PI) is allowed in the fellow eye only. IVT injections in the study eye are prohibited. 3. History of uveitis or endophthalmitis 4. High myopia (more than 6 diopter) in the study eye 5. Any ocular pathology which would impede clear imaging of the macula, e.g. intra-ocular opacities 6. Macular changes from causes other than AMD 7. Diabetic retinopathy in either eye. Note: Presence of systemic diabetes with no retinopathy is not exclusionary 8. Any other physical condition which would prevent the participant from undertaking imaging procedures 9. Any cell or gene therapy in either eye