Yes 5%uvb is used for treating MBD in combination with meds and proper diet if your vet warned you after seeing xrays it must be the case. And the frog can't be albino.

However in order to get your more helpful advise i need to know more about the condition, see pic of the frog from top and front, know a bit of history, what was happening, how did it look, why you took him to a vet, what was prescribed.