The ornamental design for a rear visionfacemask, as shown and described.
FIG. 1 is a perspective view showing the top, front and sides of a face
mask with a pair of extended vision optical elements in non-hyphen
operable stored positions, showing my new design, the side opposite being
a mirror image;
FIG. 2 is a perspective view showing the top, front and sides of the face
mask with the optical elements in operable positions; and,
FIG. 3 is a perspective view showing the top, rear and sides of the face
mask with the optical elements in operable positions.