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In page Central serous chorioretinopathy:

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Indocyanine green angiography is a key diagnostic tool to assess the extent of choroidal abnormalities, showing different leakage patterns that correlate with disease severity and possibly treatment outcome.[2] Laser Doppler imaging can be used to reveal the underlying swollen choroidal vessels under the retinal pigment epithelium and assess the health of the retina in the affected area which can be useful in making a treatment decision.[citation needed]