[SWFLguy]

Interesting thread as I wear a pair of glasses to read and
a pair for driving that are also bi-focals. However--so far I have not
needed glasses to umpire !
When I am at the plate-- I simply count the batting order and
subs-- then I fold the paper over and write the team name in
my own code short hand. As any subs are mentioned- I write
it on the blank side of the paper large enough that I can read it.
If there is a problem with the batting order I can still sort it out.
My Honig's card has places for "trips" and courtesy runners that
do not require magnification.
If my eyesight gets worse--I'll probably have to wear glasses.
PS-- I do not wear any sunglasses. The "old school" in me says that is a no-no--although I work with a lot of umpires who wear them.