answer:I was at the ophthalmologist’s yesterday. He thought my solution wasn’t bad. I wear bifocals (also with a correction for the astigmatism) for normal work. I use a special pair of RX glasses for sitting at the computer. I have yet a fourth pair of Rx glasses for the piano. When I recently took a course at the local high school, I had the computer at my desk and a slide show displayed on a wall screen. It was look up, look down, switch glasses, get a head ache and a stiff neck. Let me know what you discover. I have a Macbook air that I can see with my regular bifocals if I put it on a cushion on my lap, but I can’t really see the keyboard well enough to type.