Thank you Jenn! Now that you explained it I know which is distance (same as that marked on my boxes of lenses) and which is reading (the one that matches the magnification I get.) Duh!

Now, if they don't send me the distance between pupils I'll know how to get it.

I take it back! They already sent me the distance (63.50...does that mean my eyes are too close together??? ;-)) Off to order a pair!