I regularly have to 'Adjust' an Rx for a specific focal length for patients and have a quick question. Historically I would do a focal length computation (P=1/f) and then match their Rx as close as possible but I'd love a more exact approach. Is there a more exact way to take a persons Rx (distance or near) and compute it to a specific focal length? I am hoping for something I could build into an excel spread sheet and simply plug in the Rx and hit go.
I can't believe I'm the only one with patients needing very task specific products or doing therapeutic products.