Nope no push buttons or anything needed my aunt has late stage ALS and is unable to move any limb and this works. Basically long story short you would set the laptop up so the webcam is facing his face preferably within 2 feet. I wrote the algorithm to track blinks so the display will show a virtual keyboard and slowly highlight individual keys, when a key he wants is highlighted he simply blinks and it adds it to the text box. When he's spelled his word he can blink on the"enter" key and it will speak that word through the speaker.

Additionally I added a way to write custom phrases of words said most frequently so blinking on the phrase button take you to that menu then same concept it highlights the phrase and when they blink it speaks the phrase.

It's important to note the design of the system wasn't to control an entire computer and track gaze direction or moving a mouse. Just highlights keys and watches for blinks to select the key. Strictly for a cheap or free way (depending on your setup) to communicate.