ABCA4 and age-related macular degeneration: For example, OCT can support genotype–phenotype correlations (such as those observed for the p.G1961E variant in STGD1), drusen characterization in ADD or SFD to determine if they are different from those more commonly observed in AMD (and thus, if OCT can support the clinical differential diagnosis between these entities), or additional features in OMD to minimize misdiagnosis and unnecessary ancillary testing.