hello
I am OD in Mx, a US visitor brought me this prescription from the US. Is this the standar form to request prisms to the lab in the US?, "2 Down down" "2 UP up" it is a bit confusing to me.

DavidClick image for larger version. 

Name:	Prism.JPG 
Views:	41 
Size:	16.6 KB 
ID:	14894