Its all in learning, and it does get confusing sometimes. If you look at the trace of the "R", that is for the right lens when looking at the Mars Glasses. Not an issue there. But then look at the donor lens that it is traced on. That is the Left eye lens when looking at them. So opposite of what you would want. Probably not a big issue for this cut and pair of glasses, but would make the difference in other pairs
No it's not. The right mars lens is traced on the right crosshair lens. Check out the pic. The small side is towards the nose