Dear Snuggly, The arcus marginalis is a diaphanous fascial condensation formed where the lower eyelid septum inserts into the dense periosteal covering along the orbital rim. The orbital septum is a plane of connective tissue that separated the contents of the orbit from the eyelids. As such, the lower eyelid septum effectively holds back the lower eyelid fat. Classic lower eyelid cosmetic surgery involves making a cut through the lower eyelid skin, muscle and septum to gain access to the lower eyelid fat. The fat is resected and "excess" skin and muscle are then trimmed and sutured closed. We now understand that this almost always results in a hollow, pulled down lower eyelid with distortion of the shape of the lower eyelid and the outer corner of the lower eyelid. The transconjunctival lower eyelid surgery was re-popularized by the UCLA eye plastic surgery division at the Jules Stein Eye Institute in the mid-eighties. This procedure was done behind the lower eyelid so there was no skin incision. It was the ideal surgery for a younger person whose issue was just a little too much lower eyelid fat. It continues to be a fantastic option for the right individual. Like any procedure, when performed on the wrong person or over done, it can lead to problems, the most common being a lower eyelid deflation making the undereye circle worse. In an effort to improve results, again the UCLA eye plastic surgery division lead by Robert Goldberg, M.D., repopularized the procedure now known as the arcus marginalis release in the mid nineties. However, this procedure was first described by Raoul Loeb, a Brazilian plastic surgery, who first reported the procedure in 1981. The concept is centered on the observation that for many individuals seeking help with the lower eyelid, there is a convexity/concavity effect. The lower eyelid is too full but the area just under the eye, the nasojugal goove or tear trough hollow, lacks fullness. This lack of fullness is related to a descent of the cheek soft tissues. The surgery is performed again transconjunctivally, or from behind the lower eyelid. It is not accurate to depict the procedure as a lifting of the arcus marginalis. The surgery can actually be performed in several aways. The bone covering can be incised and elevated off the orbital rim. This leaves the septum and its insertion into the periosteum or bone cover intact. Or the arcus marginalis can be cut along the orbital rim just above its insertion into the periosteum at the orbital rim. In the former, a subperiosteal pocket is made to receive the lower eyelid fat, and in the later the pocket is made just above this level over the cheek periosteum. There are no studies that suggest that one approach is better than another. Fat from the lower eyelid is then sutured into these pockets. The effect of surgery is less fullness in the lower eyelids and more fullness in the tear trough hollow. Long term, the surgery provides a modest improvement in both the lower eyelid and the top of the cheek. It is much more predictable than inject fat grafts into this same space but it is not quite as predictable as filling the tear trough with Restylane.