Can Juvederm or Restylane help with a large vein under the eye area?

Injectable fillers are made to add volume to facial areas ie. under eye hallows. An injectable filler would not be the treatment of choice for a large blue vein. Your best bet would be to have a consult with a phlebotomist to have the vein assessed. He/ She will be able to discuss laser options and/ or injections to the area.

A filler treatment should help improve the contour of your under-eye area, but filler are not designed to mask veins.  A KTP or 1064-nm ndyag laser can safely improve or clear visible veins under the eyes.Good luck!

While you're thought process is clever, in my experienced laser treatment is by far the best way to approach unwanted veins under the eyes.  For a blue colored vein, long pulsed 1064 nm laser treatment is by far the best approach.  If not performed properly there can be increased risk to the eyes so make certain the person performing your treatment is extremely experienced and knowledgeable. Best of luck.

The fillers can help camoflage the vein if injected properly.  My suggestion is to have the vein removed with a 532 KTP laser (EVCEL V) or a verilite or a long-pulsed YAG laser.  See a cosmetic dermatolgist with experience in lasers and veins.  Best, Dr. Emer.

Periocular filler is aimed at addressing your nasojugal grooves (tear trough) and palpebromalar grooves at your lower eyelid-cheek junction. It would not be wise to rely on filler to disguise a prominent vein, it may help, but in fact it may make it worse. If a hyaluronic acid filler is injected too superficially around the eye it can actually appear blue itself because of something called the Tyndall effect. That is not to say that it would restrict you from having future treatment of that vein if desired. Periocular filler requires experience: technical experience and experience with particular products. Many experienced injectors prefer other products over Juvederm in this area particularly because of how much water it absorbs. Good news is, if you don't like it, it can be dissolved. Good luck, hope it helps your vein disappear too. 

The best treatment for veins around the eye is the 1064 YAG laser. Filling around the eye probably won't make much difference. Make sure cannulas are used to do this to minimize chances of piercing these vessels.