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Felipe Pereira, Stéphanie Fontanelli, Eduardo Amorim Novais, Caio Regatieri; Choroidal thickness comparison of non edematous and edematous macular areas in patients with diabetic macular edema using EDI-OCT. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):2798.
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© ARVO (1962-2015); The Authors (2016-present)
To compare the choroidal thickness measured by Enhanced Depth Image (EDI) Spectral Domain Optical Coherence Tomography (SD-OCT) in areas with and without macular edema in patients with diabetic retinopathy.
Sixteen eyes of 12 patients underwent high-definition vertical line scanning using EDI SD-OCT with frame enhancement software. Choroidal thickness was measured from the posterior edge of the retinal pigment epithelium to the choroid/sclera junction at 250µm intervals, starting from the center of the fovea until area without edema. Mann Whitney test was used to compare the choroidal thickness in both areas.
Mean choroidal thickness measured in the area with edema was thicker in comparison with the area without edema (249,25µm vs. 236,57µm, respectively. P= 0,3). The mean superior border of the edema was compare with the mean adjacent area without edema (270,31µm vs. 262,87µm respectively. P=0,75). We did the same comparison in the inferior area that showed a mean of 231,18µm in the area with edema and 226,56µm in the adjacent area without edema (P=0,9).
There was no difference between the choroidal thickness measured in the area with edema and without edema in the same eye of diabetic patients. Additionally it was not found a choroidal thickness pattern, as it is observed in normal subjects.
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