**1. Introduction**

White dot syndromes are an uncommon group of posterior uveitis affecting the outer retina, retinal pigment epithelium (RPE), choriocapillaris, and/or choroidal stroma. However, the clinical finding of white spots itself is variably present, the pathophysiology, as supported by multimodal imaging, may differ between them and the clinical course is different. For this reason, the term "noninfectious choroiditis" has been suggested to be more appropriate [1–4].

These noninfectious choroiditis are the result of autoimmune infiltration of the choroidal stroma (primary stromal choroiditis) such as birdshot retinochoroiditis (BRC) or immune-mediated choriocapillaris non-perfusion (primary choriocapillaritis) [3] which includes conditions self-resolving as multiple evanescent white dot syndrome (MEWDS) or sight threatening as acute posterior multifocal placoid pigment epitheliopathy (APMPPE), multifocal choroiditis (MFC)/punctate inner choroidopathy (PIC), and serpiginous choroiditis (SC).

Multimodal imaging includes several imaging modalities, such as fundus fluorescein angiography (FFA), indocyanine green angiography (ICGA), fundus autofluorescence (FAF), and optical coherence tomography (OCT) and optical coherence tomography angiography (OCT-A), that play a key role, in determining the primary level of tissue involvement, evaluate disease activity, and monitor response to

treatment. The aim of this chapter is to describe the different findings on multimodal imaging of these heterogenous disorders.
