Pupil vignetting artifact on optical coherence tomography angiography.

Purpose: To discuss the features of an artifact on optical coherence tomography angiography (OCTA), termed "pupil vignetting artifact," and describe how it may masquerade as true chorioretinal pathology.

Design: This was a retrospective, observational case series.

Methods: The authors studied 12 eyes at a vitreoretinal clinic in Eastern India, reviewing a dark shadow such as an artifact on OCTA images.