Fig. 2

Representative case of dot-type subretinal drusenoid deposit (SDD) (A–D) and ribbon type SDD (E–H). (A) and (E) show color fundus photographs. Magnified insets of the SDD, enclosed in green boxes at the bottom left corner, provide clearer visualization of each SDD type. (B) and (F) are blue peak fundus autofluorescence (FAF) images. C and G are infrared reflectance (IR) images. (D) and (H) show pointwise retinal sensitivity maps and corresponding OCT B-scans. All images are co-registered to display the same macular region. Both dot-type (A–D) and ribbon-type (E–H) SDD involve the macula, defined as more than 10 SDDs within the macula area on an OCT scan. Blue line is indicate the margins of SDD to facilitate cross-modality comparisons of SDD extent and retinal sensitivity. In the dot-type case (A–D), most SDDs are confined within the blue circle, whereas in the ribbon-type case (E–H), SDDs are located outside the blue circle. Retinal sensitivity is markedly reduced in the presence of ribbon-type SDD (H).