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Focal choroidal excavation in eyes with central serous ?chorioretinopathy ?

Session Details

Session Title: Imaging I

Session Date/Time: Thursday 26/09/2013 | 08:30-10:30

Paper Time: 09:02

Venue: Hall 3 (Level 0)

First Author: A.Ellabban JAPAN

Co Author(s):    A. Tsujikawa   S. Ooto   K. Yamashiro   A. Oishi     

Abstract Details

Purpose:

To study the prevalence and three-dimensional (3D) tomographic features of focal ‎choroidal excavations (FCE) in eyes with central serous chorioretinopathy (CSC) using ‎swept-source optical coherence tomography (OCT).‎

Setting:

Prospective cross-sectional study. This study was conducted in the department of ophthalmology and visual sciences, Kyoto University hospital, Japan.

Methods:

We prospectively examined 116 consecutive eyes with CSC with a prototype 3D swept-source OCT at ‎‎1,050 nm. 3D images of the shape of the macular area, covering 6 x 6 mm3, were ‎reconstructed by segmentation of the outer surface of the retinal pigment epithelium ‎‎(RPE). ‎

Results:

‎3D swept-source OCT detected FCE in 9 eyes (7.8 %). The 3D scanning protocol ‎allowed for detection of small extrafoveal excavations and the 3D segmentation method ‎coupled with en-face scans allowed for clear visualization of the morphology of the ‎excavations. In 5 eyes with FCE, unusual choroidal tissue was detected beneath the ‎FCE, bridging between the bottom of FCE and the outer choroidal boundary. In addition, ‎three of those five eyes showed a suprachoroidal space below the FCE, as if the outer ‎boundary of choroid is pulled inward by this bridging tissue. FCE was often seen within ‎the leakage point and choroidal hyperpermeability. Eyes with FCE were more myopic ‎‎(-4.42 ± 2.92 diopters), and the subfoveal choroidal thickness was significantly thinner ‎‎(301.3 ± 60.1 µm), as compared to control CSC eyes (P = .001 and .036 respectively).‎

Conclusions:

FCE is present in approximately 7.8% of eye with CSC. In eyes with CSC, FCE could ‎be formed by the retraction of the RPE by the focal scaring of the choroidal connective ‎tissue.‎

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