Or at least, in one spot you are. Not to say that you're flawed, but on
this site, you can find the location of the blind spot.
Give
this a shot:
Click Start on the java applet first. Cover your left eye and stare at the cross. Slowly move your head closer to the screen until you can't see the black spot anymore. Then, use your mouse to click around the area you can't see to map out the size of your blind spot. You can do the same thing for the other eye by staring at the black spot and mapping out the area around the cross.