The application Test your eyes - Press the right button was meant to let you test how sensitive your eye is for different wavelenghts of light, but more so, to find out if women can really see colors better.

Choose a color (red/green/blue). You will see six buttons. Your task is to choose the one with the most intense color. As you pass the levels, the color difference decreases to the point where you can no longer tell which one is the right button. On every level you start with one extra chance, so only the second faliure (in a row) will result in game over.