I have many 'magnifying' tools...........ha!
My first is a tall circular lamp with magnifying lens and circle fluorescent light that is about 20 years old, weighs a TON, and is only on it's SECOND circular bulb after all these years. (I've had a spare purchased for over 5 years, i know!)
I also have a small circle that clamps on to your work area that even has a small circle within itself that is a 12x magnifier. It is on a flexible goose neck. Works well in the right situation.
Then, of course, there are the drugstore 'old lady glasses' and I have some at the highest magnification, and those work ok in some situations.
I would have to say the round magnifier that hangs around the neck is my least favorite because every time I move, it moves. Maybe if I could sit still better it would work better.
That's my story and I'm sticking to it!
Lynn