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Tools, rather than more reading.
Three things that do a job an article cannot: check a grid at a known physical size, compare a label against a trial formulation, or print a sheet to take out of the house. Free, no email required, and none of them recommends a brand.
Amsler grid self-check
A grid that measures itself against a bank card before it draws, works out the viewing distance from the size it ends up at, walks each eye separately, and prints a dated record for your appointment.
Anyone monitoring macular degeneration, or told to watch for changes in central vision.
Open the toolNo brand rankingsAREDS2 label checker
AREDS2 is a trial name, not a certification, and anyone can print it on a bottle. Type in what the panel on the back says and see exactly where it differs from the formulation that was studied.
Anyone holding a supplement bottle and wondering whether the label means anything.
Open the toolPrintableAREDS2 patient handout
One page, written to be handed over rather than read online. The eligibility box comes first, because for most people who read it the correct outcome is that none of the rest applies.
Eye-care professionals, and patients who want something to take to a shop.
Open the tool