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Background . The article presents impact results of vitrectomy for complicated cataract surgery on retinal and optic nerve electrogenesis. Materials and methods . 30 patients (30 eyes) with history of dropped nucleus (1st group) or intraocular lens dislocated into the vitreous cavity after phacoemulsification (2nd group) underwent electrophysiological examination before vitrectomy, and on Day 1, Day 3, Day 7, Day 14, Day 30, Day 60, and Day 180 after surgery. Results. In the 1st and 2nd groups, on the 1st day after vitrectomy, we observed a significant decrease in retinal and optic nerve electrogenesis in comparison to normal indices (p > 0.01); to Day 180, electrophysiologic indices returned to normal values. In the 1st group, baseline retinal and optic nerve electrogenesis was decreased in comparison to normal parameters. In the 1st and 2nd groups, the electrogenesis of photoreceptors recovered twice as rapidly, as that of bipolar cells; papillomacular bundle neurons were more resistant to vitrectomy. Conclusion. Thus, the presence of lens nucleus fragments in the vitreous cavity results in a reliable inhibition of the retinal and optic nerve electrogenesis due to phacotoxic effect. Vitrectomy causes a short-term depression of the retinal and optic nerve electrogenesis, followed by normalization of indices to Day 180. Photoreceptors have greater rehabilitation activity than bipolar cells. The neurons of axial topographic orientation have the highest resistance to vitrectomy impact.

Analysis of retinal and optic nerve electrogenesis dynamics after vitrectomy for complicated catarct surgery