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Choroidal and macular thickness assessments are essential to understand the evolution of central serous chorioretinopathy and could help in identifying patients more prone to recurrence. The aim of this work was to evaluate changes in the choroidal thickness and macular thickness in acute non-treated central serous chorioretinopathy during a one-year follow-up. A prospective longitudinal study of 38 patients with central serous chorioretinopathy and 35 healthy controls at a tertiary care facility (Fundación Alcorcón University Hospital) was conducted. Choroidal and macular thicknesses were measured using enhanced-depth-imaging optical coherence tomography and subretinal fluid resolution and best-corrected visual acuity were evaluated, at baseline and 1, 3, 6 and 12 months. Prognostic factors determining the need for treatment were evaluated. Choroidal thickness decreased in eyes with central serous chorioretinopathy ( p  &lt; 0.001) but not in fellow eyes ( p  = 0.24) during one-year follow-up since the acute episode. The estimated mean choroidal thickness in symptomatic eyes was 465 µm (SE: 17.18) at baseline and decreased 58.1 µm (CI 95%: 30.1-85.9) at 12 months (p &lt; 0.001). Best-corrected visual acuity improved over time ( p  = 0.037), with a decrease of logMAR 0.086 (CI95%: 0-0.172). The macular thickness changed over time ( p  &lt; 0.001), with a decrease from baseline of 124.6 µm (CI95%: 61.4-187.9). Subretinal fluid resolved in 67% (CI 95%: 51-82) of patients at 6 months. There was no significant association between baseline choroidal thickness, macular thickness, best-corrected visual acuity, age or sex and the need for treatment. The choroidal thickness decreased in acute central serous chorioretinopathy episodes during a one-year follow-up. Subretinal fluid persisted in less than 20% of patients at the end of the one-year follow-up. No prognostic factors determining the need for treatment were found.

One-year follow-up of choroidal and macular thickness in acute non-treated central serous chorioretinopathy