Optical coherence tomography in unilateral resolved central serous chorioretinopathy

Purpose: To evaluate the correlation between optical coherence tomographic evaluations of foveal thickness and anatomical changes within the fovea and visual acuity in patients who have unilateral resolved central serous chorioretinopathy. Methods: A retrospective review of cases of unilateral resolved central serous chorioretinopathy imaged with high-resolution optical coherence tomography was performed. The foveal thickness of the involved eye was normalized by dividing its thickness by that of the uninvolved fellow eye. The best-corrected visual acuity of the involved eye was normalized as well. The normalized foveal thickness was compared with the normalized visual acuity. The anatomical findings of the fovea were compared with the visual acuity. Results: Twenty patients were evaluated (11 men and 9 women; age range, 31-66 years [mean, 46.8 years]). The mean foveal thickness was 135.8 mu m in the involved eyes and 184.4 mu m in the uninvolved eyes (P<0.001). There was a correlation between the normalized foveal thickness and the normalized visual acuity (Spearman rho, 0.67; P=0.001). The external limiting membrane was visible in 7 (35%) of the involved eyes compared with 19 uninvolved eyes (95%) (P<0.001). In the involved eyes, those with a visible external limiting membrane had better visual acuity than did those that did not (P=0.001). It was possible to visualize the boundary between the photoreceptor cell bodies and the outer segments in 8 (40%) of the involved eyes and in the 17 uninvolved eyes (85%) (P<0.001). In the involved eyes, those with a visible boundary between the photoreceptor bodies and the outer segments had a better visual acuity than did those that did not (P=0.019). Conclusions: Patients with unilateral resolved central serous chorioretinopathy had a decrease in the central foveal thickness in the involved eyes, and there was a statistically significant correlation between the foveal thickness and the visual acuity, even in eyes with relatively good visual acuity. The inability to observe a discrete signal corresponding to the external limiting membrane layer was more common in involved eyes and was significantly associated with decreased visual acuity. This same relationship was seen with the ability to visualize the boundary between the photoreceptor bodies and the outer segments; this boundary was less commonly observed in involved eyes and was associated with decreased visual acuity. Resolved central serous chorioretinopathy causes a number of morphologic changes in the fovea that are associated with visual acuity.