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The number of people suffering from paralysis is increasing year by year globally. As a result, the role of assistive devices among these people is becoming important. With the aid of an assistive device a disabled person can have a more private and easy life by eliminating the need of a caretaker. This paper proposes a non-invasive wearable tongue controlled assistive device called Optical Tongue Controlled Assistive Device (OTCAD). The sensing element used to sense the tongue movement is a low cost IR (infra red) reflective sensor. These are fixed bilaterally near user’s cheek. The intensity change in IR caused due to tongue movement is measured, processed and converted in to user commands using suitable algorithms. These commands are then wirelessly transmitted to a receiver, which can be connected to a PC/Smartphone. Using the PC/Smartphone as a medium, a user can control devices in their home environment or control wheel chair without the help of caretaker.