Abstract
Purpose: :
To perform morphofunctional evaluation of patients with idiopathic epiretinal membrane (MER), before and after surgery, by microperimetry (MP1) and optical coherence tomography (OCT).
Methods: :
Nineteen eyes of nineteen consecutive patients with idiopathic MER were treated with vitrectomy and peeling of MER. Preoperatively and 1, 3, 6 months after surgery, all patients underwent complete ophthalmological examination including best corrected visual acuity (BCVA; in logarithm of the minimum angle of resolution units) (LogMAR), macular sensitivity and retinal fixation investigated using MP1 and macular thickness quantified with OCT.
Results: :
Before surgery mean BCVA was 0,5 ± 0,92 logMAR, mean retinal sensitivity was 9,9 ± 1,67 dB, and mean retinal thickness was 474 ± 116 µm. Six month after surgery, mean BCVA improved to 0,2 ± 0,92 LogMAR and macular sensitivity increased with 12 ± 1,6 dB as well as stability of fixation. Preoperative macular sensitivity at 4° , 8° and 10°, separately analyzed, showed a mean baseline sensitivity lower in the central 4°(7,9 ± 2,1 dB), 8°(10,2 ± 1,2 dB) area compared with the peripherical 10° area (11 ± 1,6 dB). Six month after surgery, macular sensitivity showed an higher improvement in the central 4°(11 ± 5,3 dB) , 8° area (12,9 ± 3,5 dB) compared with peripherical 10° area (11,1 ± 1,9 dB). Macular thickness decreased of 290 µm at 6 month of follow up.
Conclusions: :
The analysis of retinal sensitivity after surgical removal of idiopathic MER, showed a better improvement in the central macular area compared with the peripherical one probably related with the higher decrease of foveal thickness.
Keywords: vitreoretinal surgery • imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) • retina