A Blink
Blink, Wink
noun, verbal noun
A blink is a blink and a wink as well, depending on how many eyes you use.
A wink is all it takes to get the "Ma butter" (まばた) from the store. It's hidden, and they only bring it out if you do the wink.
瞬きせずに、この絵を見続けてください。
Don’t blink and just keep looking at the picture please.