They are all the same, provided they work. I see things very simplistic and not to often do I find someone to agree with me. LOL
Atemi is a strike using any part of your body to strike any part of your opponents body. If the opponent moves good, if the opponent does not move fine he/she gets hit.
A fist in the eye is a good eye closer.
I agree keep it simple. Getting to complicated with definitions is a distraction of its own.