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En‐face imaging of epiretinal membrane using swept source optical coherence tomography
Author(s) -
Kim J.T.,
Chung H.
Publication year - 2016
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2016.0689
Subject(s) - optical coherence tomography , epiretinal membrane , ophthalmology , medicine , retinal , macular hole , vitrectomy , visual acuity
Purpose To define morphologic features of epiretinal membrane (ERM) using en face images from swept‐source optical coherence tomography (SS OCT). Methods Consequtive patients with idiopathic ERM were analyzed for en face imaging analysis within a 6‐month period. All patients had undergone 3D volume scan of swept source OCT (Triton OCT, Topcon, Japan). The patients were devided into 3 groups, retinal thickening without retinal hole (Group 1); retinal thickening with lamellar macular hole (Group 2); retinal thickening with macular pseudohole (Group 3). Secondary ERM were excluded from analysis. En face imaging was analyzed on and under the level of ILM. Results Mean patient age was 63.6 ± 10.8 years ( n = 77). Mean central retinal thickness (CRT) in group 1, 2, and 3 was 422.3 ± 73.3 μ m ( n = 51), 334.1 ± 39.6 μ m ( n = 34) and 277.7 ± 58.6 μ m ( n = 12). En face imaging under ILM level well visualized central tractional membrane (CTM), and imaging on the ILM level showed well radiating folds (RF) over the posterior pole. Group 1 had CTM over the fovea (100%), however Group 2 had CTM outside the fovea (94.1%). Group 3 had better BCVA and lesser CRT than the other groups (ANOVA p < 0.05). Conclusions En face SS OCT provides an useful tool to visualize the pathologic features in epiretinal membrane. Lamellar macular hole might be associated with perifoveal or extrafoveal epiretinal membrane and it's tractional force. Macular pseudohole might be associated with ERM or prior macular traction. En face SS OCT provides an useful tool to visualize the pathologic features in epiretinal membrane.