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elmonoenano t1_jbzk3v3 wrote

Unless you were extremely blind, before the industrial age it wasn't all that important. You don't need to see all that great to plow a furrow or swing a scythe or to watch for stray animals, etc. Most people didn't read very much, if at all. If you couldn't see well you wouldn't be apprenticed into a trade where it mattered if you weren't a farmer, and most people were farmers.