This disclosure relates to the field of Optical Coherence Tomography (OCT). This disclosure particularly relates to methods and systems for providing larger field of view OCT images. This disclosure also particularly relates to methods and systems for OCT angiography. This disclosure further relates to systems for health characterization of an eye by OCT angiography. This OCT angiography system may determine a feature of a vasculature within an eye tissue and thereby identify a vascular anomaly and a spatial location of the vascular anomaly within the eye tissue.