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  • Title: Visual acuity and microperimetric mapping of lesion area in eyes with inflammatory cystoid macular oedema.
    Author: Munk MR, Kiss CG, Huf W, Montuoro A, Sulzbacher F, Kroh M, Larsen M, Schmidt-Erfurth U.
    Journal: Acta Ophthalmol; 2014 Jun; 92(4):332-8. PubMed ID: 23802743.
    Abstract:
    PURPOSE:   To evaluate the effect of fluid accumulation on local visual function in inflammatory cystoid-macular-edema (ICME). METHODS:   This cross-sectional study applied optical-coherence-tomography over a 12×12 fovea-centered field in 50 patients with ICME and mapped the extent of fluid-filled spaces in various retinal layers, of subretinal-fluid and of diffuse-edema. Regression analysis examined effect of planimetric fluid-distribution on best-corrected-visual-acuity (BCVA) and mean microperimetric-sensitivity. RESULTS:   BCVA decreased with increasing central-neuroretinal-thickness (r= 0.52, p= 0.001), total central-retinal-thickness, including subneuroretinal-fluid (r= 0.41, p= 0.006), total cystoid-and-diffuse edema-area (r= 0.35, p= 0.036) and cystoid inner-nuclear-layer area (r= 0.39, p= 0.02). Mean retinal-sensitivity decreased with increasing diffuse edema-area (r= -0.86, p<0.0001), total cystoid-and-diffuse edema-area (r= -0.54, p= 0.001), cystoid inner-nuclear-layer area (r= -0.46, p= 0.008) and cystoid ganglion-cell-layer area (r= -0.6, p=0.049), central-neuroretinal-thickness (r= -0.42, p= 0.028) and total central-retinal-thickness (r= -0.34, p= 0.039). In multivariate-analyses BCVA was best described by central-neuroretinal-thickness, duration of edema, total cystoid-and-diffuse edema-area and cystoid inner-nuclear-layer area (R(2) = 0.5, p= 0.002). Mean retinal-sensitivity was best described by diffuse edema-area, total cystoid-and-diffuse edema-area and central-neuroretinal-thickness (R(2) = 0.75, p< 0.0001). Subretinal-fluid area and cystoid outer-nuclear/Henle's layer area had no effect on either BCVA or microperimetry. CONCLUSIONS:   Thickening of the neurosensory-fovea, not subfoveal-fluid, had major impact on both BCVA and retinal-sensitivity. The extent of edema in inner retinal layers also had major impact on both of these two functional parameters. Visual-impairment seems to differ depending on the layers involved, thus different types of fluid accumulation may potentially be given varying treatment priorities.
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