Brailletouch: Mobile texting for the visually impaired.
Frey, B., Southern, C., and Romero, M. In IEEE Proceedings of 4th International Conference on Intelligent Human Computer Interaction (2012), 1-6. Blindguide: An audio based eyes-free caller guide for people with visual impairment. Issues and techniques in touch-sensitive tablet input. Royal Institution Of Blind Youth, Paris, 1829. Procedure for writing words, music and plain song using dots for the use of the blind and made available to them. No-look notes: Accessible eyes-free multi-touch text entry. Bonner, M., Brudvik, J., Abowd, G., and Edwards, W. Graffiti: Wow! Pen Computing Magazine, January 1995. We found that the detection time for a particular key was significantly less and the detection was much accurate in a keypad containing only the functional keys rather than QWERTY or traditional 4x3 keypad. We report the preferable keypad type for our blind mobile users where detection for a particular key is made faster and less error prone. 
We explored how the detection time for a particular key in a jumble of keys varies with different keypad conditions where target users searched for a key only through the tactile sense. But the presence of a huge number of keys in keypad plays negative impact in interaction procedure for our target users. In Indian subcontinent people popularly use keypad-based handsets and are well habituated with the key based interaction.
This work aims to find an effective interaction mode to access mobile phone by the visually impaired people in India. Due to the lack of their visual perception, blind people have different preferences towards interacting with a device. Mobile phone is mostly common communicating device in recent time but blind people have limited accessibility to that device.
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