+ 5 magnification. Portable, discrete, lightweight. The key to using these is that, unlike your natural vision - you don't re-focus your eyes to compensate for an item being out of focus, you move your head, or the item. So when you pick up your work to look at it - you move your hands toward you or away to bring it into focus. It is actually relaxing to use - as you don't have to fight to see. Lens are quite thick, but not too heavy. Clips onto your glasses - oodles of clearance and will not touch the lens. These are quite strong.

By the each.