With age, there is resorption of bone and decrease in soft tissue density around the eyes resulting in tear trough hollowness.
In my practice, I use customised low-viscosity fillers depending on severity and extent of tear trough hollowness. Injecting fillers at the correct depth will yield optimum natural results with no to low downtime (swelling, bruising).
Hope this helps!
Best Regards,
Dr David Deng