Low Vision Playing Cards. These cards feature 1" numerals, and black & red colors on white. Bridge size.
Bicycle's easiest-to-read deck, made specifically for players with poor vision who can't read a regular deck of playing cards, is the best deck yet. Huge indexes, plus suits in four easy-to-distinguish colors make this deck perfect for the purpose. You get two Bicycle Rider decks, one with a blue back, one with a red back.