Magnifiers for SMD soldering
You can purchase an inexpensive USB microscope that can work very well. The main drawback of the inexpensive unit that I use is a small lag when displaying the image. But I quickly got used to the delay. 

There are many such microscopes available. I have two identical units purchased from eBay and I assume that Asian suppliers such as Aliexpress or Banggood have them for even less cost. 

Use it with an old netbook computer.