Japanese researchers have shown that black currant pigments can slow down glaucoma vision loss. (Details in see.nf/currants.) This was accompanied by an increase in ocular blood flow, but no change in intraocular pressure, suggesting that berries might also work for “normal tension” glaucoma, the type in which the optic nerve deterioration proceeds despite normal eyeball pressure.6605 Note that most “currants” sold in the United States are little raisins (Vitis vinifera) and not actual currants (Ribes nigrum), which were illegal to grow until recently, due to pressure from the lumber industry
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