I just noticed at the Lion Brand site that their patterns are now available in large print and Braille-convertible formats for visually impaired knitters.
I remember reading in the Little House on the Prairie books about how Mary learned to do some type fiber art at the School For the Blind (which is in Vinton, Iowa), but I don’t remember if it was knitting or crocheting. It might even have been embroidery. I should start reading those books to the kids, I loved them when I was younger!