PRP is safe as it is prepared from your own blood. There is no risk of blindness with it. But the results you get may not be as good as Fillers...
Mostly your daughter is not having any functional problems with her nose. She wants it for cosmetic purpose. We devide nose in three parts as upper, mid and lower third. Her upper and mid vault seems to be broad. She may require Rhinoplasty in future but Let her skeletal growth be complete, early surgery may not be able to give her desired results.
For sunken eyes we need to replace the volume which is deficient. It can be either by a filler or by fat grafting.Both procedures have almost same risks.But Fat grafting is more economical and long lasting as compared to fillers.
As you mentioned you see difference in your nose level while smiling. You can have an more active muscle on one side. You can try injection of Botox on that muscle to achieve symmetry.
