Hmmm...interesting! That sure looks green to me, but.... That is from the special edition. a ton of color-correcting/restoration went into those. Not saying I don't believe they are green, I'm just curious then, were the sandtrooper helmets lenses different than the regular stormtroopers? were every trooper's lenses even the same? there were a lot of "thrown together sloppy" details on all the originals, because they're just not noticeable in the final edits.
edit: I was looking through screens from the originals, and they're too hard to tell to be conclusive. some look black, some look like they could have greenish highlights....