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Macular sensitivity and structure in epiretinal membranes 6 months after surgical treatment
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Edité par CCSD ; Association for Research in Vision and Ophthalmology -
Purpose: To evaluate the evolution of macular sensitivity (MS) and its correlation with visual acuity (VA) and Spectral-Domain Optical Coherence Tomography (SD-OCT) in patients with idiopathic epiretinal membrane (ERM) at 3 and 6 months after surgical treatment.Methods: Prospective, monocenter, interventional case series. We included 49 patients (49 eyes) with an idiopathic ERM scheduled for a surgical treatment. Among these patients, 34 were evaluated at 3 months (M3) and 32 at 6 months (M6) after ERM and internal limiting membrane removal. At each visit a measurement of best-corrected visual acuity ETDRS, a microperimetry and an SD-OCT were performed for all patients.Results: The MS significantly was improved from 11.7±2.1 dB preoperatively to 12.9±1.8 dB at M3 (p=0.001) and 13.3±1.9 dB at M6 (p=0.001) postoperatively. In the same time we observed an improvement of VA from 70.0±10.2 letters ETDRS at inclusion to 80.1±6.9 letters at M3 (p<0.0001) and 80.8±6.5 letters at M6 (p<0.0001). Macular thickness significantly decreased from 412.6±53.1 µ to 340.5±29.6 µ at M3 and 332.9±26.9 µ at M6. We found a significant correlation between pre and post operative MS at M3 (r=0.565; p=0.0002) and M6 (r=0.584; p=0.0001). A significant correlation between pre and post operative VA was also found at M6 (r=0.558; p=0.0003) but not at M3 (r=0.229; p=0.097). We did not find any significant correlation between the increase in MS and VA (r=0.286; p=0.112) and between MS improvement and macular thickness decrease (r=-0.196; p=0.283).Conclusions: VA and MS measurement are different but complementary aspects of macular function in the evaluation of patients with ERM.
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