After I gave myself a small bruise under the right eye by falling on my face yesterday I wonder why the bruise is at a different place from the actual impact.
Photograph, about 28 hours aftewards. My face hit the floor where the minor cut on the cheekbone is, in the lower left quadrant. (The very shallow cut is from the edge of my eyeglasses - unbreakable sports glasses, fortunately.) - but there is no noticeable bruise where the face hit the floor, just under the eye - an area that is noticeable recessed and was wholly covered by my large glasses, so it cannot have been hit). The darker colour overall in the eye socket is due to ordinary lack of sleep. (BTW no neurological or vision symptoms at all - it was a pretty light fall.)
So what caused the bruise under the eye? I seem to recollect that shape of bruise is pretty common with minor cases of black eye I have seen on others.