Central serous chorioretinopathy
Central serous chorioretinopathy (CSC or CSCR), also known as central serous retinopathy (CSR), is an eye disease that causes visual impairment, often temporary, usually in one eye. When the disorder is active, it is characterized by leakage of fluid under the retina that has a propensity to accumulate under the central macula.
Source: Wikipedia — Central serous chorioretinopathy (CC BY-SA 4.0)