Jay,

Poked around and found these links - seemed to have some good
explaination....


http://www.allaboutvision.com/over40/progressive.htm

http://www.eyeglasses.com/progressive_lenses.page
(Scroll down aways. Gets into how to read a prescription, too.)

http://www.optiboard.com/forums/arch....php/f-51.html
(way more info than you or I need, but skimming though some of the
posts, I learned there are many different types of progressive lenses
and they all have their pros and cons. (high-wing vs. low-wing/ side
stick vs. yoke kind of thing...)

FWIW

Randy