The Pigtail Sign: A New Spectral Domain Optical Coherence Tomography Finding After Inverted ILM Flap Surgery for Idiopathic Macular Hole.

Purpose: To report a new spectral domain optical coherence tomography (OCT) finding called the pigtail sign. It was found during follow-up of idiopathic macular hole cases after inverted internal limiting membrane (ILM) flap surgery.

Methods: This is a retrospective case series of 12 eyes (12 patients) who underwent inverted ILM flap technique for idiopathic macular hole closure.