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

CLINICAL RELEVANCE: 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. BACKGROUND: 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. METHODS: 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. RESULTS: Choroidal thickness decreased in eyes with central serous chorioretinopathy (p < 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 < 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 < 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. CONCLUSIONS: 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.

Sensitivity and specificity of choroidal thickness measurement by EDI-OCT for central serous chorioretinopathy diagnosis.

PURPOSE: To evaluate the utility of choroidal thickness (CT) measurement by enhanced depth imaging optical coherence tomography (EDI-OCT) for central serous chorioretinopathy (CSC) diagnosis. METHODS: Cross-sectional comparative study of 62 consecutive patients: 38 with acute CSC and 24 with macular subretinal fluid from differential diagnoses (DD). Subfoveolar choroidal thickness was measured using EDI 9-mm horizontal protocol. We evaluated sensitivity, specificity and intraclass correlation coefficient. RESULTS: Mean subfoveolar CT was greater in CSC group than in DD group (465.45 ± 115.42 µm vs. 347.54 ± 111.27 µm, p < 0.001). The best threshold measure was 390 µm in patients younger than 50 years giving a sensitivity of 89.7% (CI 95%: 73.6-100%) and a specificity of 75% (CI 95%: 40.9-87.3%). For patients older than 50 years best threshold measure was found at 400 µm giving a sensitivity of 45.5% (CI 95%: 21.3-72%) and a specificity of 80% (CI 95%: 58.4-91.9%). Intraclass correlation coefficient for CT measurement was 0.87 (CI 95%: 0.74-0.93). CONCLUSION: CT measurement with EDI-OCT helps to differentiate CSC from other causes of macular subretinal fluid in patients younger than 50 years.