Figure 4: Differentiating features of chorioretinal folds and elevations corresponding to specific choroidal vessels. (A) This 46 year-old patient with chorioretinal folds and oral topiramate use has a thick subfoveal choroid (461 μm) and infoldings in the choriocapillaris, RPE, and outer retina which do not correspond to specific choroidal vessels; (B) In contrast, this 84 year-old patient with age-related choroidal atrophy has multiple focal elevations of the RPE and outer retina (arrows) that correspond to specific choroidal vessels in an overall thin choroid (96 μm); (C) This 57 year-old male with a symptomatic submacular choroidal varix has focal chorioretinal contour changes which, similar to B., corresponds to the underlying choroidal vessel; the vessel lumen diameter measures 245 μm and the choroid measures less than 100 μm in adjacent locations.