Blindness After Facial Filler: An Alternative Theory

Facial fillers are widely regarded as a safe and effective method for cosmetic enhancement, with common adverse effects including bruising, swelling, and tenderness. Rarely, however, vascular complications can occur, resulting in severe outcomes such as sudden blindness. The classic theory posits that a retrograde column of filler is injected into a vessel and reaches the take-off of the central retinal artery, yet several biomechanical and clinical inconsistencies challenge this mechanism. We propose an alternative theory in which filler emboli enter a vessel and follow anterograde flow to reach the central retinal artery. This model better accounts for the rapid and sometimes simultaneous distribution of emboli observed clinically. Understanding the underlying pathophysiology is essential, as prevention strategies may differ depending on the mechanism.