Or get bi-focal sunglasses. There are expensive ones, cheap but good bi-focal "safety glasses" or you can get paste on bi-focal inserts. Made a world of difference for me. Don't really need them on the run, but they sure help on the bike.

When I started the "little phone as HR/Pace/Distance" device, it was all about running. I experimented with wearing glasses when I ran, but that idea's level of suck was acceptable only in cool temps and easy runs. There was a period in the early 80's where the cool runners wore sunglasses, but most of us got over that. That's not criticism btw, if you, dear reader, wear sunglasses when you run, more power to you.

In a pair of cycling glasses I recently put on a pair of stick-on optical lenses. Mfr is Neoptix. I'd never heard of their ilk. Someone pointed me towards them a month ago. Really a great solution for turning any pair of sunglasses into bifocals. With them, the bike's computer became usable again. Which is when the bike computer died.

After several months of occasionally taking the little Android phone on runs, the bike computer's wheel xmitter died. It occurred to me that the phone could do the job just fine, so I attached it to the handlebars with rubber bands. As a result, instead of being tempted to buy an expensive GPS based bike computer, I'm using a $25 phone.

With all the money I saved, I went shopping for SRAM etap.

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"If only he had used his genius for niceness, instead of Evil." M. Smart

I've used a garmin 810 with some big display fields and/or some Tifosi Readers http://www.tifosioptics.com/readers/

Similar - Dual Eyewear has some great cycling, running glasses that have a choice of reader strength perfectly positioned in the bottom inside position of each lens - most have interchangeable lenses as well - use mine for cycling and driving..

I'm an old guy, too, and need my reading glasses to see anything up close. So, it's been a long time since I could see those little cyclocomputers. But I bought a Bryton Rider 310 and have been very pleased with the size of the screen, readability, and price.