unfortunately, I donīt think a microscope would help on that.
What angle would you choose to look at the edge to be able to see a rounding?
What would you be looking for? Even a 3.000$+ optical microscope wonīt help much.
Verhoeven made some scanning electron microscope pictures of razors
and even there you just canīt tell if its rounded, or not.
And the angle measurement by laserbeam wouldnīt tell either.
Rounding is nearly impossible to proove