Eye Blink Detection in Neurosky Mindwave Mobile Using Arduino

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Hello,

I am using the Neurosky Mindwave Mobile Headset, a BlueSmirf Gold Bluetooth Modem, and an Arduino Mega 2560 Microcontroller.
Using a tutorial, I was able to connect and pair the headset with the arduino via the bluetooth modem successfully.
After which, I ran a sample code that shows the attention level of the user on the Serial Monitor.
Details are on the following link:
http://developer.neurosky.com/docs/doku.php?id=mindwave_mobile_and_arduino

According to the specifications, the headset can detect attention, meditation, and eye-blink detection.
Can someone please help me on how can I detect eye-blinks using Arduino?

Thanks