Juvederm Voluma XC injected in the under eyes? Should I continue or switch?

Both physicians are likely correct.  Often patient require a deep injection of filler to correct mid facial volume loss. Thicker fillers such as Voluma, Restylane Lyft and sometimes Radiesse can be used for the deep, just over the bone injections.  Then a second layer , nearer the surface is treated with a very thin filler such as Beletero or Restylane Silk.  I find that in this are Silk causes more swelling than Beletero.  Sometimes the skin is so thin, we may dilute Beletero with saline to make it less viscous.  The injection is first placed under the obicularis muscle and then a more superficial injection immediately above the muscle.  With very thin skin the more superficial injection cannot be performed. Bluish discoloration generally has not been a problem, especially with Beletero, although the amount and location of injection is important.   

Hello Vnsal799,The tear trough is a very delicate area to inject.  The thin skin makes it prone to have contour irregularities and poor results when fillers are injected.  For this reason, I always stress it is important to have you injections in this area from one of the core aesthetic physician injectors (facial plastic surgeon, plastic surgeon, dermatologist, oculoplastic surgeon).  As far as the best filler for the tear trough, I prefer to use Restylane.  What is nice about this product is it does not tend to pull in a lot of water so you don't exchange a hollow for a bag (I feel Juvederm pulls in too much water when used in this area giving a poor outcome).  As far as Voluma you are correct it can last up to 2 years.  The drawback is that it is a much thicker product which makes it much more prone to contour irregularities.  There certainly are people who inject the tear trough with it but Juvederm and Voluma are the top two products I dissolve in that area from other's injections.  Of course, those who are happy aren't seeking out a second opinion with me so I don't see those who were originally happy.  As far as who you should go with and what injection, that is a decision for you and then you and your treating physician.  I would say it is always easy to add more product later if you think you didn't get enough.  If someone starts out saying 3 syringes I would personally be a little worried.  I have injected in a thin skin patient as little as 0.12 cc on each side with complete correction.  Conversely, I have injected someone twih a full syringe on each side and still not gotten to full correction.  There clearly is a range, and depending on your anatomy, you may need more, but start slow.  Yes, we can inject hyaluronidase to dissolve a bad result, but then you lose out on your original injection.  I would recommend to start gradually, add more as needed, and make sure you see a physician injector. I hope this helps and good luck.