The other useful program would be one that can process a photo of a person wearing glasses and suggest which adjustments they should make to get the frames seat

The other useful program would be one that can process a photo of a person wearing glasses and suggest which adjustments they should make to get the frames seated properly. Bonus points if the program can also spit out the script details based on the observed distortion of one's face through the lenses. I was very happy with my online order (Zenni), but it took a bit of mucking about to get them adjusted properly and sitting comfortably on my face.