Quote Originally Posted by Euclid440 View Post
20-30 power is great for looking straight down on the edge for bevel set and at finish to make sure micro-chips have not developed, from too much pressure, bad or very hard steel.

A good edge will look like a dark blur. Any damage will be a shiny reflection.

It is quick and easy method, to see any damage to the edge.
+1
look for white line at top of bevle if its there keep setting, your not done