I have been using an eye loupe for viewing small electronic components, inspecting PCBs etc. However I was intrigued the other day when I saw this illuminated LED eye loupe
at Sparkfun and I thought I should make my own.
The instructable shows how to adapt an ordinary eye loupe to an illuminated LED eye loupe. After I made one, I was surprised at how much better the magnified objects look due to the illumination.