All great advice on visual aids.
Don’t skimp on this part of your business. Buy what works for you. I use surgical loupes 5 X magnification. A representative custom fitted the loupes for me. I use Orascoptic, but there are many ways to go on this. I have been very pleased with my setup. The complaint I have is after five hours of working, the glasses feel too heavy on my nose.
A stereo microscope, like what James uses, would solve that problem, but I couldn’t get it to work for me. For that equipment, you need to purchase a screw on lens that suits your arm reach. In my case, that would be a 150mm. The 125 was too short and the 175mm was too long. The rep didn’t have a 150mm for me to try, so I gave up. It was an exhausting experience, but at least I gave it a good try. Stereo microscopes are expensive, but they offer powerful magnification.