Pachychoroid disease

Pachychoroid disease, as originally described, includes a multitude of clinical presentations along a spectrum that includes central serous chorioretinopathy. The set of clinical features that defines pachychoroid has evolved to include focal or diffuse choroidal thickening attributable to dilated outer choroidal/Haller’s layer vessels (pachyvessels) and thinning of the choriocapillaris and Sattler’s layers. Fundus tessellation often is reduced and drusen are absent or scarce. The relative emphasis of each of these features in defining pachychoroid continues to undergo refinement as new data are incorporated.