took one's eyes off
犯人とその仲間は目を離した隙に逃げ出した。
The culprit and his accomplices escaped the moment we took our eyes off them.
テープを交換していてなぜ目を離した?
Why did you look away while changing the tape?
— es[エス] (2001)
目を離しただけなのにすぐこぼれた。
I only looked away for a second, and it spilled right away.