A.N. SAMOYLOV^1,2, I.I. ZAYNUTDINOVA², A.R. ABDRAFIKOVA¹

¹Каzan State Medical University, 49 Butlerov Str., Kazan, Russian Federation, 420012

²Republican Clinical Ophthalmological Hospital of the Ministry of Health of the Russian Federation, 14 Butlerov Str., Kazan, Russian Federation, 420012

Samoylov A.N. — D. Med. Sc., Professor, Head of the Ophthalmology Department, tel. +7-987-296-35-43, e-mail: [email protected]

Zaynutdinova I.I. — ophthalmologist, tel. + 7-917-296-68-25, e-mail: [email protected]

Abdrafikova A.R. — resident doctor, tel. +7-967-362-16-60, e-mail: [email protected]

The aim of the study was to determine the functional parameters of the retina in patients with epiretinal fibrosis by multifocal electroretinogram (mfERG) before and after surgery. The study group consisted of 10 patients who underwent surgical treatment of epiretinal membrane (ERM). Functional results were evaluated using mfERG before and after vitrectomy for 10 and 30 days. Were taken into consideration: wave amplitude (in mV), peak latency of component P1 (in ms), retinal density (in nV/deg2) on three topographical rings (R1-R3). As a result, performance of mfERG before surgery of epiretinal fibrosis revealed a decrease in retinal density, amplitude of component P1 and an increase in latency P1 component in all topographical areas of macular area. Ten days after the rear vitrectomy was revealed some improvement in retinal density parameters of foveal region, but in the analysis of indicators P1 component were determined reduced values of the amplitude with increased latency. On the 30^th day was revealed an improvement in mfERG. This is confirmed by improvement of retinal density in fovea and recovery of indicators of amplitude P1. Thus, during mfERG at all stages of observation was noted a slow recovery of electrogenesis of P1 component. Analysis of electrical activity results in the performance of mfERG showed improvement in retinal function not earlier than one month after vitrectomy. Subjectively, all patients had a persistent increase in visual acuity. This allows us to talk about the absence of a negative effect of removing the internal border membrane on visual functions.

Key words: epiretinal fibrous proliferation, vitreomacular traction syndrome, multifocal electroretinogram, spectral domain optical coherence tomography, posterior vitrectomy.

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