OUR LOUPES ARE PROUDLY MADE IN THE USA

2640 George Urban Blvd  Suite 4

 Depew, NY 14043

Selfie picture

Cortel Designs will build a custom loupe with your exact PD and working distance with a selfie. 
Hold the card against your face and snap a picture like in diagram. 

Note: Not sure how she is keeping the card on her face, you should hold the card during the picture.