out the corner of (one's) eye(redirected from out the corner of eye)
out the corner of (one's) eye
Fleetingly. Said of things that one sees quickly and briefly, rather than clearly. Out the corner of my eye, I saw something moving in the bushes, and it turned out to be a stray cat.
out of the corner of one's eye
Glancing casually or surreptitiously, as in Out of the corner of my eye I saw Justin walking out the door. This expression refers to looking sideways at something rather than directly.