Abstract
Purpose:
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.
Methods:
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.
Results:
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).
Conclusions:
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.