[Effects of laser operations in the iris-lens diaphragm area on the thickness of the macular region and peripapillary nerve fiber layer]. / Vliyanie lazernykh operatsii v oblasti iridokhrustalikovoi diafragmy na tolshchinu makulyarnoi oblasti i peripapillyarnogo sloya nervnykh volokon.

All methods of laser radiation therapy currently used in clinical practice are positioned as safe in terms of possible negative effects on the eye and surrounding tissues. PURPOSE: To assess possible changes in the macular region of the retina and thickness of the peripapillary retinal nerve fiber layer (RNFL) according to the results of a dynamic study of OCT parameters after laser operations in the iris-lens diaphragm area. MATERIAL AND METHODS: Optical coherence tomography (OCT) was performed on 34 pseudophakic patients (43 eyes) with clinical signs of secondary cataract with best corrected visual acuity (BCVA) of at least 0.3, and on 28 patients (38 eyes) with relative papillary block before laser intervention and 1 hour, 1 day, 3 days, 7 days, 1 and 6 months after surgery. The changes in the thickness of the retina in 9 standard ETDRS areas, and the thickness of the ganglion cells layer and peripapillary RNFL were analyzed. RESULTS: In both groups of patients during the entire observation period, there was no fundamental change in the thickness of the peripapillary RNFL and the ganglion cell complex (all p>0.05). According to OCT, retinal thickness in both groups significantly increased an hour after laser irradiation in 5 out of 9 ETDRS areas. The retinal thickness returned to preoperative values in the group of patients with Nd:YAG laser posterior capsulotomy on the 3rd day after surgery, and after 1 week in the group with Nd:YAG laser iridectomy. Retinal thickness in the macular area did not change significantly during the follow-up. CONCLUSION: Laser operations in the iris-lens diaphragm area have a negligible effect on the thickness of the retina, as measured by the OCT method, do not affect the thickness of the ganglion cells layer or peripapillary RNFL, and is safe for the central zone of the retina.

[Retinal changes after laser interventions on anterior segment of the eyeball]. / Izmeneniia setchatki posle lazernykh vmeshatel'stv na strukturakh perednego otdela glaza.

Laser surgery of the cornea, iris, angle of the anterior chamber and other parts of anterior segment of the eye sees wide application in clinical practice. The adverse effects it can cause in the anterior segment are well known and understood. At the same time, changes the treatment method can cause in the posterior segment of the eye - primarily, in macular area of the cornea, which is of great importance, have not been studied sufficiently. Purpose of the review - to consolidate previously published data on changes in the retina after laser intervention on the anterior segment of the eye.

[Morphological and functional features of vitreous].

The structure of vitreous is discussed in the article. Its morphologic characteristics are described with consideration of topography and structural features. General vitreous anatomy and its distinct compartments are highlighted. Native and foreign literature concerning biological, biochemical and biophysical properties is analyzed. The value of vitreous developmental and structural features in pathogenesis of some pathologic conditions is estimated The parameters of distinct analyzed characteristics essential to form spatial sonographic image are shown.