ACTA1 and occult macular dystrophy: Immunohistochemistry validated these findings, showing that OMD was completely absent from control vessels but enriched in plaques, where intra‐ and extracellular signal for OMD was found in the fibrous cap of low‐calcified plaques, whereas in high‐calcified plaques OMD was present closely around the calcification nodes in regions with α‐SMA+ cells.