In the small town of Vinh Chau there are about 700 people blind in one eye and 300 more blind in both eyes. Vinh Chau is one of the most fertile red onion production centers of Vietnam, and it is a major reason for their vision loss.
The varietal labeling of wine as we know it is a very modern phenomenon. It was popularized in California in the 1960s. Prior to that -- and even today with inexpensive jug wines -- California wine was usually labeled with a broad moniker like "Burgundy" or "Chablis."