Huge increase in accuracy for only $14!
Well, if you need glasses that is :o . My eyes aren't as good (or as young) as they once were, so I've had to get reading glasses. They live in my office and I don't like to take them to the shed as I'm likely to forget to take them back to the house. I bought some 1 diopter reading/magnifying glasses from my local "$2 shop", for, you guessed it, two dollars each. They're small enough to sit on my nose and peer over (a la granny glasses) and I can easily read even the half mm markings on my steel rule with them.
I also bought two magnifying glasses for $5 ea from one of those warehouse type places. These were the type that have a cast iron base and swivelling arms for holding fishing flies etc. I modified one so the glass was mounted on the longest arm and stuck it on top of my TS fence. The glass sits over the magnified cursor on the rip fence meaning I don't need to wear glasses when using the TS. The other magnifying glass I mounted on the flipstop on the sliding table cross cut fence. This had a magnifier over the cursor but this makes it much clearer and easier to read.
Pic shows the mounted magnifying glasses, the original base with fly vices and my granny glasses. It's a bugger getting old, but accuracy doesn't have to suffer. ;)
Grandpa Mick