On Wed, 12 Sep 2007 01:48:17 +0000, Dave Martindale wrote:
"Leo Lichtman" writes:

2.) Glasses with a bifocal element at the top. They are made for
librarians (who have to read stuff on the higher shelves) and people who
have to read meters and gauges that are above eye level. I used to have a
pair, and they are also good for working off a creeper under the car.

And airline pilots, who have to read complex display panels overhead.

And even aircraft mechanics, and I suppose car mechanics. :-)

Cheers!
Rich