quote Alan:"Ford Prefect might recall that in the old days of small-screen black & white CRT sets, a company sold a huge magnifying glass that stood on a stand in front of your average 17- or 19-inch TV. It worked, but it was strictly viewing for one person."
i also remember the time, in the 60's when lots of people wished they could get a color tv; in the meantime, they would buy a plastic sheet that was rainbow colored; they fixed it over the screen and BINGO!
they had a color tv.
if i remember well, the magnifiers glasses were Fresnel lenses.
