Locked-in syndrome is a condition in which a patient is aware but can't move or communicate due to complete paralysis of all voluntary muscles in the body except for eye movements and blinking. It is very difficult for patients with locked-in syndrome to communicate and say what they need or want. Currently, one way provided to communicate is that, a nurse keeps a paper in front of the patient. Alphabet letters are written on this paper In order of their frequency. Then the nurse starts reading the letters one by one. Once the nurse reads a letter which is a part of a special word in patient's mind, the patient blinks.Then the nurse writes down that letter. This action goes on until all letters of patient's considered word are written. This application uses blinking detection technology by tablet camera. Camera recognizes the place where the patient is looking at, and automatically detects what letter the patient is looking at and juxtapositions them all to find the considered word