I love the though of using only one inexpensive marked deck for everything. But I wasn't sure how
well I'd be able to see the markings so I only bought one pack to find out.
Turns out they
work great with my with old, dry eyes & bifocals, better than anything I've tried so far. I plan on
getting a brick when they come back in stock. (Grand kid has got to learn to cheat some time yo
know. ;-)