Sunken Eyes and Dark Circles Treatment for Contact Lens User?

Dear Mark
This is the risk of seeing better without glasses, it makes you want to look better as well.
Under eye Restylane is a fantastic option for your under eye area. However, you need about 2.5 ml of Restylane on each side. I think you risk being under treated with will lead to disappointment.
I very much prefer Restylane and Perlane for this application. Juvederm which is marketed as being "smooth" in my opinion is too runny for this application and seems to slip out of the lower eyelid space and accumulates at the top of the cheek.
It is impossible to achieve an acceptable result for this area with grafted fat because the tissue covering in the tear trough hollow is so minimal.
I encourage you to look at before and after filler results at my website: lidlift.com
Dr. Steinsapir

It's not unusual for patients to note periorbital aesthetic problems when they transition from eyeglasses to contact lens. The most likely explanation for this phenomena is that eyeglasses hide these problems while contacts expose them.Nevertheless, dark circles beneath the eyes and tear trough deformities are two of the most difficult problems treated by plastic surgeons. These problems occur for a variety of reasons and the treatment is entirely dependent upon the cause.In this particular case, it's virtually impossible to make treatment recommendations without pictures or a physical examination. In some cases, fat pads can accentuate hollows beneath the eyes and cast shadows that give the appearance of dark circles under the eyes. Under these circumstances, lower eyelid blepharoplasty with fat re-positioning is probably appropriate.In other cases, tear trough deformities may be the problem. Under these circumstances, the injection of hyaluronic acid fillers may be appropriate. Finally, pigmentation changes may be related to allergies and other medical problems. When this situation arises, treatment with bleaching creams may be indicated.It's appropriate for patients with these changes to consult a board certified plastic surgeon. This surgeon should be able to formulate a treatment plan that addresses your anatomic findings and achieves your aesthetic goals.

Unfortunately, there is no great solution for your problem. Fillers would help somewhat hide the shadow beneath the eyes, but not to a great degree. Your skin is darker in that region and Hydroquinone 4% would lessen the  hyperpigmentation. Hopefully, this combination approach gives you a satisfactory appearance. 

I believe with injection of fillers in the tear trough, your dark circles can be improved. There is no permanent treatment for dark circles. So you can just improve them. Also there are some products that can decrease the pigmentation in the area along with PRP that can help with this area.    

The good news is that your hollow lower eyelid appearance can be dramatically improved with injectable fillers. You should find an experienced, board-certified dermatologist or facial plastic surgeon with many favorable photos demonstrating great results.
Lower eyelid hollows are delicate, so MD credentials, experience, and photos are critical for you to get the result you want.
The bad news is that I'm not aware of any good treatments for darkness of the lower eyelid skin. It's likely caused by years of chronic nasal allergy, and I'm still searching for the magic serum to lighten this area.
Best regards.