Autologous fat filler for tear troughs is a syringe that extracts fat from other parts of the body, processes it, and then injects pure fat particles to fill the tear trough location. Most of the tear troughs can be solved by one filler, but there are also patients who need a second filler. After transplantation, the fat cells can regain blood circulation through the newly established capillaries in the body to make the fat viable, and the viable fat will not wander away and disappear, making it a permanent filler. Because of the advantages of easy survival of autologous fat, less trauma, shorter recovery period and higher safety, most of the clinical candidates will choose to use autologous fat for tear trough filling. However, there is a certain survival rate of autologous fat transplantation to fill the tear trough, usually about 50% of the fat cells can survive, only the stable surviving fat cells can permanently exist in the tear trough area to maintain the fullness of the tear trough. If the amount of fat cells filled is not well controlled, the filling area may be uneven, and if too much fat is injected at one time, it may cause a situation similar to the protrusion of fat from the eye bags. Therefore the surgery must choose an experienced surgeon to achieve a better filling effect.