According to an article in the University of North Carolina at Chapel Hill magazine Endeavors ("Fair Games"), UNC computer science students are designing games for players with low vision. The games were field tested at "Maze Day," when 70 kids with visual impairments came from all around North Carolina to play:
The game [Move to the Music] gives [the blind player] audio feedback on her performance: a handclap when she steps in time to the beat, an occasional buzzer when she’s off rhythm. Six-inch-wide pieces of carpet cover the centers of the squares on the pad, telling her feet where to step....
Other students used information readily available on the internet to write programs that can communicate with Nintendo’s Wii controller, called the Wii Remote or 'Wiimote.' Given the task of making a sports game, one group picked a sport that would be familiar to their target audience: beep ball. The real-life game is based on baseball and played by many blind kids and adults, using a softball that beeps and bases that make buzzing sounds. The game the students created combines verbal cues such as 'Ready!' 'Pitch!' and 'Strike!' with simple figures that seem to zoom closer to the player as they run across a green field. The player swings the Wiimote to hit the ball, then shakes the controller back and forth to run toward a base.
The games are playable on common, inexpensive hardware, and are open source; they can be improved or adapted as necessary.