An image display provides a stereoscopic image to an observer by advancing
either light having a first polarization axis or light having a second
polarization axis toward the eyes of the observer while arranging a
prescribed reference side of a display panel in a first direction, and
provides another stereoscopic image to the observer by advancing either
light having a third polarization axis or light having a fourth
polarization axis toward the eyes of the observer while arranging the
prescribed reference side of the display panel in a second direction
intersecting with the first direction.