Samsung announced the Galaxy Core Advance phone this week, it has advanced features in a new case designed specifically to help visually impaired users. Additional features for the visually impaired include Optical Scan which recognizes text from an image and reads it out loud, light sensing technology that uses a camera to sense light direction of brightness, and instant voice recorder making it easier to create voice notes. These features greatly enhance the usability of the phone but the most important new feature is the cover. The cover emits high-frequency sounds that acts like radar. It bounces back the sounds of objects within 2 m and can send the vibration or text-to-speech notification to help the visually impaired.
Samsung also has a stand that will hold the phone to scan documents at exactly the right height so that when the document with text is placed underneath the camera the camera will read the text out loud to the user. The user also will have the ability to attach tags to objects that will be read out loud by the phone.
You can read the press release from Samsung here.
There is a great article with more detail at gigaom.com