Biomedical subjects

A A Rybnikov

Publications and source records attributed to A A Rybnikov.

4 recordsLinked to original sources

PubMed1991

[Comprehensive study of the iris in transformed light in simple glaucoma].

Complex examination of the iris under light transformed by various methods - iridochromoscopy with iridochromophotography, transillumination in red light, and fluorescein angiography - was performed on 26 eyes of patients with simple glaucoma and 24 normal eyes of subjects aged between 42 and 76 years. All the methods employed revealed iris changes in 100% of the simple glaucoma cases. The differences found between the study group and the controls were significant (P = 0.01). A highly positive correlation was found between the results of iris fluorescein angiography and iridochromoscopy with iridochromophotography (r = 0.932; P = 0.0005), as well as between the results of iris fluorescein angiography and transillumination in red light (r = 0.921; P = 0.0005). Complex examination of the iris under transformed light showed the most typical changes in simple glaucoma to be exogenous pigmentation of the pupillary and ciliary regions, partial or complete destruction of the pupillary margin, and stromal atrophy affecting the pupil or the entire iris. Defects and thinning of the posterior iris pigment layer, iris vessel permeability disorders associated with hypoperfusion and microneovascularization in the lesser circle and the ciliary region were also found.

Adult↗

PubMed1990

[The complex study of the iris in transformed light].

Complex investigations of the iris in a transformed light by methods of iridochromoscopy, iridochromophotography, examination in a polarized light, transillumination in red light and fluorescence angiography was conducted in 25 eyes of patients with open-angle glaucoma, 10 eyes of patients with anterior flaccid uveitis and in 23 healthy eyes (a control group). It was found that in patients with open-angle glaucoma and anterior flaccid uveitis trophic and vascular changes in the iris predominated, as compared with control. The most typical for open-angle glaucoma changes in the iris were atrophy of the stroma with predominant involvement of the pupillary zone, exogenic pigmentation of the pupillary and ciliary zones, destruction of the pigment margin of the pupil, thickening of the anterior border layer, pseudoexfoliation of the pupillary margin, defects in the posterior pigment layer, being more extensive in the pupillary zone, as well as disturbances in permeability of the iris in a combination with hypoperfusion and rare bundles of microneovascularization in the area of a lesser arterial circle and the ciliary zone. In case of flaccid uveitis, the most frequent changes were diffuse atrophy of the iris, efflorescence of the pupillary margin, destruction of the pigment rim of the pupil, multiple defects in the posterior pigment layer along its whole length, increased permeability of vessel, microneovascularization of the iris stroma in a form of a thin vascular network.

Adult↗

PubMedDate not supplied

[Iris examination in transformed light in primary open-angle glaucoma].

The iris was examined in transformed light by iridochromoscopy, iridochromophotography, biomicroscopy in polarized light, transillumination in red light, and fluorescent iridoangiography in 83 eyes of patients with primary open-angle glaucoma and 117 eyes of normal reference subjects. The examinations have shown the prevalence of trophic and vascular shifts in the iris of all glaucoma patients as against the reference patients (R 0.05). The major iris changes revealed in primary open-angle glaucoma were stromal atrophy with the predominant involvement of the pupil segment, destruction of the pupil pigmented border, exogenic pigmentation of the pupil and ciliary segments, thickening of the anterior border layer, pseudoexfoliation of the pupil edge, defects of the posterior pigmented lamina disseminated in the pupil segment, hypoperfusion of the iris vessels combined with their impaired permeability and micro-neovascularization in the iris edge and ciliary agea.

Adult↗

PubMedDate not supplied

[A simple method for automonitoring of the visual fields to be used in screening for glaucoma].

A simple method for automonitoring the visual field nasal border is suggested, fit for screening examinations as well. It consists in successive putting of one, two, or four fingers to the bridge of the nose. In a reference group of normal subjects putting one finger to the bridge of the nose induced narrowing of the nasal border of the visual field by 17 degrees on an average, by 26 degrees with two fingers, and by 34 degrees with four fingers. The method was tried in 27 patients with glaucoma (34 eyes). The detection rate of visual field abnormalities in the patients with Stages II--III condition has made up 92.3%.

Glaucoma↗