I Had Injection of Restylane in Tear Trough 2 1/2 weeks ago. I had severe bruising and swelling? (photo)

This may be swelling and bruising that is still not healed, its set you consult with your medical provider and have an in-person evaluation 

Its best to consult with your provider, he/she would know how much product was injected and if it deep or superficial. You can try taking arnika to help eliminate the bruising

Restylane is a great product but special care must be used in the delicate area under the eye.  I usually use Belotero under the eyes because it avoids the risk of "blue" Tyndall effect under the eyes.  You have considerable bruising and swelling from the injections.  I suggest you return to your treating physician for evaluation to see if this should be dissolved.  Please find a board certified dermatologist with experience in injections for the best cosmetic result.