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Purpose: To evaluate the possibility of registration of the photopic negative response (PhNR) without pupil dilatation in healthy individuals to determine the dysfunction of neurons of the inner retina.Methods: 12 healthy persons (23 eyes) aged 24 to 40 years were examined. Refraction anomalies did not exceed 0.5 diopters. A PhNR was evaluated in photopic ERGs recorded on a blue background with red flashes of four intensities (0.375, 0.75, 1.5, 3.0 cd·s/m2) using the RETIport/scan21 (Roland Consult). First, ERG was recorded with the natural pupil (3.5 ± 0.2 mm). Then, the recording was repeated after drug mydriasis (average pupil size 8.7 ± 0.1 mm).Results. In eyes with natural pupil width, in comparison with drug mydriasis, PhNR amplitudes in responses to weakest stimuli (0.375 cd·s/m2) were significantly reduced. The effect of pupil size on the PhNR amplitude from a baseline was virtually absent in responses to higher strength flashes. This phenomenon can be associated with an irregular distribution of light over the retina with small pupil size, the effect of which is maximal in responses to weak flashes. For the maximal brightness stimuli (3.0 cd·s/m2), differences were found between groups of non-dilated and dilated pupils in the amplitudes of the b-wave and PhNR from the b-peak, which may reflect a decrease in the number of stimulated photoreceptors during ganzfeld stimulation when the pupil is not dilated.Conclusion. The effect of pupil size on the parameters of the PhNR was most significant in the ERG with minimal flash strength and it decreases in responses to flashes of higher brightness. If it is necessary to record the ERG without drug mydriasis, especially in screening studies, it is recommended to limit the protocol to estimate the PhNR from a baseline in responses to maximal flashes, and use the relative parameter — the amplitude ratio of PhNR/b. Keywords: photopic negative response, electroretinography, pupil width

Currently, the mitochondrial component is becoming increasingly significant in the development and progression of glaucoma optic neuropathy. Since mitochondria have their own genetic apparatus, the study of qualitative and quantitative changes in mitochondrial DNA (mtDNA) becomes part of the disease diagnosis, in addition to studying the functional characteristics of the organelles alone. Moreover, the inability to explain the nature of the disease by known mutations of nuclear DNA contributes to the the study of mtDNA. In this review, we briefly discuss the mitochondrial genetics and the role of mitochondrial haplogroups in the diseases manifestation. We summarize the accumulated data on the qualitative and quantitative changes in mtDNA in patients with glaucoma. We discuss the approach to prevent the inheritance of mutant mtDNA as a part of assisted reproductive technologies, as well as the first steps towards the mtDNA heteroplasmy level manipulation and direct mtDNA editing.

Provides information about the beta-blockers: history, mechanism of action, adverse systemic and local effects, the use in the treatment of glaucoma and ocular basic forms used in Russia.

In the literature review presents an analysis of epidemiological researches carried out in Russia and CIS on the study of the prevalence of different types of glaucoma, depending on race and ethnicity.

В обзоре литературы представлен анализ зарубежных эпидемиологических исследований, касающихся изучения распространенности различных типов глаукомы в зависимости от расовой и этнической принадлежности.

Purpose: to investigate hypotensive efficiency of new surgical intervention at terminal primary and neovascular glaucoma.Methods. Operation has been executed on 35 eyes of 35 patients with terminal primary (23 eyes) and secondary (12 eyes) neo- vascular glaucoma. A fornix based conjunctival flap was prepared in inferior part of a limbus. 1.5 mm transparent scleral incision 3 mm from limbus was performed. Goniocyclodialysis with spatula was carrying out. then 0.3 ml of viscoelastic solution was entered in cyclodialysis cleft. On sclera put cryoapplications, located in two ranks (on 6 in everyone). the period of postoperative follow-up has averaged 15.6±1.3 months.Results: In 1 month IOP did not exceed 25 mm hg and the painful syndrome has been stopped in all cases. In 1 year after operation normalization IOP took place on 27 eyes (77.2%), from them on 8 was local hypotensive therapy added. With 8 patients (22.8%) IOP instillation of 2 preparations remained at level of 28-30 mm Hg, however the painful syndrome was absent.Conclusion: Long-term hypotensive effect of new operation is reached at the expense of the double mechanism: reduction of production of aqueous humor for the account cryopexy of ciliary body and improvements aqueous outflow for formations cyclodialysis cleft.