Personaly, I'm not a fan of the magnifying lamps. THe problem is that the magnification is 2 dimensions. The magnifying stuff "cheats" the distances. It's like you are blind on 1 of your eyes. It can be great for small details (eyes, for example) but not so good for people who just can see correctly on short distance and need a all around device.
The magnifying eye glasses (with 1 lense on each eye) are better because your keep the 3D effect your 2 eyes give to your brain. Distance interpretation is better.
It's what I heard from other modellers. Personaly I don't need that for now (I'm "just" myopic so my short distance view is....spectacular
)