Typical groove above the orbital rim and orbital muscle roll, visible even without smiling - fillers and liquid fat seem to not work for this unlike usual tear troughs (I don't see results in medical literature). However, I've seen convincing results in Raul Loeb's 1989 book and on the late Dr. Meronk's website - both used pearl fat grafts behind the septum. What have prevented this procedure from becoming widespread and is there any hope to solve this in the near future?