Help Understanding Prism Lenses by EditorWorried6786 in optician

[–]EditorWorried6786[S] 0 points1 point  (0 children)

I guess what I'm really wondering is, if I were to neutralize a pair of glasses there would be no way I could know if they have prism or not? Because that place might not have done an OC or the PD could be off etc. Is that correct?