Posters

Function assessment of the retina macular zone in patients with epiretinal fibrosis before and after vitrectomy

Poster Details

First Author: A.Samoylov RUSSIA

Co Author(s):    A. Abdrafikova                             

Abstract Details



Purpose:

The study of macular zone by multifocal electroretinography (MERG) before and after posterior vitrectomy with peeling of internal limiting membrane (ILM) in patients with epiretinal fibrosis (EF).

Setting:

The study group consisted of 10 patients (10 eyes) who underwent surgical treatment of epiretinal membrane (ERM). The diagnosis was established according to the spectral optical coherence tomography (SOCT).

Methods:

All patients underwent a standard 25G + vitrectomy (Constellation, Alcon) with ILM peeling. Functional results were evaluated using MERG before and after vitrectomy and on 10 and 30 days. We took into account indicators: the wave amplitude (in mV) peak latency of the P1 component (in ms), retinal density (in nV/deg2) in the foveal (R1), parafoveal (R2) and perifoveal (R3) fields.

Results:

Prior to surgery showed multifocal electroretinogram decrease retinal density amplitude component P1 and component P1 increase latency in all areas (R1-R3). 10 days after surgery showed a slight improvement in retinal foveal density parameter field, but values were reduced P1 amplitude and latency parameters - increased. On the 30th day after the operation showed a persistent improvement in the field of retinal fovea density reduction indicators P1 and amplitude.

Conclusions:

Analysis of electrical activity when the MERG showed slow recovery electrogenesis component P1 and the improvement of retinal function is not earlier than 1 month after vitrectomy. The findings revealed SOCT successful anatomical result of the operation. Subjectively, all patients had improvement in visual acuity. This allows us to talk about the absence of a negative impact of the removal of the ILM to the visual function.

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