This 2017 review of carotenoids aimed to synthesize the available literature that has led the scientific community to believe that carotenoids lutein and zeaxanthin have broad uses for visual and cognitive health as they are selectively absorbed and sequestered in the retina. These carotenoids are thought to have excellent antioxidant, blue light filtration and contrast sensitivity mitigation of glare properties. These mechanisms may be protective in such conditions as: age-related macular degeneration (AMD), age-related cataract (ARC), cognition diseases, ischemic/hypoxia induced retinopathy, light damage of the retina, retinitis pigmentosa, retinal detachment, uveitis and diabetic retinopathy.
Jia YP, Sun L, Yu HS, et al. The Pharmacological Effects of Lutein and Zeaxanthin on Visual Disorders and Cognition Diseases. Molecules. 2017;22(4):610. Published 2017 Apr 20. doi:10.3390/molecules22040610 https://pubmed.ncbi.nlm.nih.gov/28425969/