Figure 17: Acute central serous chorioretinopathy in a 56-year-old male. (A) One week after photodynamic therapy, choroidal swelling has decreased by approximately 10%. The outer choroidal vessels remain swollen. (B) One month later, the choroidal thickness has decreased to 276 μm and dilatation of outer choroidal vessels is diminished. CCT = central choroidal thickness; PDT = photodynamic therapy.