On Wednesday, February 27, 2013 3:27:19 PM UTC-5, Matt Herron Jr. wrote:

Unfortunately I need readers to see the instruments, and prefer polarized lenses to see other gliders

NoIR offers polarized filters and you can put bifocal prescription lenses in some of their frames behind the filter. I'm going to try those plastic stick-on reader lenses so that I get the close vision in just the right spot.