About 10 years ago, my allergies got so bad I needed a very light pair of reading glasses to use the computers. When the allergies cleared, so did my need for glasses. I've had to occasionally break the glasses out when my eyes get really tired or when working with small wiring.
Last week, the pain started. By the end of a day, it hurt to read or to work on the computer too long.
I am going to the eye doctor tomorrow. I'm hoping it's something simple and treatable, since the reading glasses are still too strong (and they're the weakest made) but the pain is only easing a little.
I'll try to report the results tomorrow.