Amazon.com Inc. will add two features to the Kindle e-book reader to make the gadget more accessible to blind and vision-impaired users. Mondayâ??s announcement comes a month after Syracuse University in Syracuse, N.Y., and the University of Wisconsin-Madison said they would not consider widely deploying the device as an alternative to paper textbooks until Amazon makes it easier for blind students to use. Both universities bought some Kindles to test this fall.