Oxidative Stress and Retinal Aging
Abstract The retina is one of the most metabolically active tissues in the body, characterized by high oxygen consumption, abundant mitochondria, continuous exposure to visible light, and a high co...
Macular Pigment Optical Density (MPOD) Explained: Biology, Measurement, and Clinical Relevance
Abstract Macular pigment optical density (MPOD) quantifies the concentration of macular xanthophyll carotenoids—primarily lutein, zeaxanthin, and meso‑zeaxanthin—in the central retina.(1,2) These p...
AREDS vs AREDS2: What Changed and Why
Abstract The original Age-Related Eye Disease Study (AREDS) established that high-dose antioxidant vitamins (vitamin C, vitamin E, β‑carotene) plus zinc and copper reduced the 5‑year risk of progre...
Complement Pathway in Age-Related Macular Degeneration Explained
Abstract The complement system is a central component of innate immunity that bridges pathogen recognition, inflammation, and clearance of cellular debris. Dysregulation of complement activation ha...
Abstract Geographic atrophy is an advanced form of age-related macular degeneration (AMD) characterized by progressive loss of retinal pigment epithelium (RPE), overlying photoreceptors, and chorio...
Ferroptosis in Retinal Disease: Mechanisms, Evidence, and Therapeutic Implications
Abstract Ferroptosis is an iron-dependent, non-apoptotic form of regulated cell death characterized by accumulation of lipid hydroperoxides and failure of antioxidant defenses, particularly glutath...