I hate to tell you, but its called "presbyopia" which is latin for old eyes. So far, I am ok with the flip down mag unit. Was on the water today and had some trouble tying on a tiny prince so I may try that mag threader.
I'd take one of them teeny little tippets and teeny little flies down to the local drugstore. I'd try on the reading glasses until I found the magnification I needed for the job. It might be you need a stronger power for tippets than for general reading. Or, go fishing with a 12 year old.