While playing with a blue/violet laser (5 mW, 405 nm) tonight, I noticed that on dark, non-fluorescing surfaces, the beam reflection was trailed by what looked like a dimmer reflection of the beam. The effect was most easily observed when I moved the laser in a circular motion. The apparent 2nd reflection was not produced by a side lobe of the laser diode, as it always trailed the main reflection, regardless of clockwise or counterclockwise rotation. Also when I stop moving the beam, the second 'reflection' quickly merged with the main beam reflection.
I doubt it is caused by phosphorescence of the material (cloth) I was lasering, as it also showed up when I pointed the laser at the floor, other sorts of cloth and painted walls.
So, do rods, cones, visual purple or other eye components phosphoresce when hit with deep blue light?