AIM: To analyze clinicofunctional and echobiometric indicators of the eyes in children with target refraction, pseudofacial myopia, and their mothers.
MATERIAL AND METHODS: In the eye department of the clinic of the Tashkent Pediatric Medical Institute, a correlation analysis of optical and echobiometric indicators was conducted in 30 children (30 eyes) with artifakia and their mothers (60 eyes). Visiometry, keratorefractometry, and ultrasound examination (A/В scan of the eyeball) were conducted. Children were examined 12-14 months after CC extraction with intraocular lens (I0L) implantation.
RESULTS: A strong direct correlation was determined between the optical power of lOLs in children and their mothers who were theoretically planned for I0L implantation of lOLs in the group that has achieved target refraction. This may indicate the possibility that the child has the same optical power as the mother and the optical power of lOLs in a child is the same as that in adults. No correlation was found between the optical power of the I0L in the eyes of children with pseudophakic myopia and maternal artificial lenses theoretically planned for implantation.
CONCLUSION: The direct strong correlations between the optical power of the I0L of children and the lenses of their mothers in the group with the target refraction achieved by this age make it possible to use the optical power of maternal lenses as a “guideline" when calculating the power of the I0L implanted in children to achieve the target refraction. The lack of correlation between the refractive powers of the I0L in children with pseudophakic myopia and the lenses of mothers may indicate that the SRKII formula with age-related hypocorrection is not adapted to calculate the I0L power in children at risk of excessive refractive enhancement after surgery.
This study explores the advancement of optical recognition for plastic bottles through the implementation of sophisticated lighting systems. The research focuses on enhancing the accuracy and efficiency of identification processes, critical for recycling and waste management. Through a systematic examination of various lighting conditions, the study aims to optimize optical recognition algorithms for improved performance in diverse environmental settings. The results offer valuable insights into the potential of advanced lighting systems in refining the optical identification of plastic bottles, contributing to the advancement of sustainable waste management practices.
From the analysis of the literature, it is known that agricultural pest control devices designed to combat insects or for fishing attract flying insects, the growth of functional systems of Fish and fish larvae in one norm plays an important role in the development of light rays of optical radiation sources. Instruments with incandescent lamp, fluorescent, halogen or light-emitting semiconductor optoelectronic irradiators are widely used as sources of optical radiation in this area. When creating agricultural devices from them, light-emitting semiconductor optoelectronic devices are considered to withstand competition with performance, energy efficiency and other physical characteristics. In connection with these, the research methods and results of the study on the distribution of semiconductor optoelectronic irradiators in the air and aqueous medium as well as the spectral characteristics are described in this work.
This article presents a comprehensive analysis of key quality indicators for spun yarns, focusing on yarns with a linear density of T=20 (Ne=30) tex produced on both simple and compact ring spinning machines. Through the utilization of optical instrumentation, various parameters including relative breaking strength (Rkm), strength, elongation at break (E %), and hairiness (H %) were meticulously examined to evaluate yarn quality. The study delves into the assessment of yarn unevenness (CV %) as a crucial quality metric, aiming to provide insights into the deformation characteristics of spun yarns. By employing advanced optical techniques, such as high-resolution imaging and precise measurements, the deformation behaviour of yarns under different spinning conditions is elucidated. The findings shed light on the influence of spinning machine type on yarn quality parameters, revealing nuanced differences in strength, elongation, and hairiness between simple and compact spinning processes. Additionally, the analysis highlights the correlation between yarn deformation and overall yarn quality, emphasizing the significance of understanding deformation mechanisms in optimizing textile manufacturing processes. Through a rigorous examination of these quality indicators, this research contributes valuable insights into the intricate dynamics of spun yarn deformation and its implications for textile production. The utilization of optical instrumentation offers a novel approach to visualize and quantify yarn deformation, providing a deeper understanding of the factors influencing yarn quality and performance in industrial settings.
This article gives a brief overview of optical devices used in shooting. This article is intended to acquaint students (students) of higher, secondary special and secondary education institutions with information about optical devices used in shooting.
Purpose. To study the effectiveness of the use of the drug retinalamin in the complex treatment of patients with glaucomatous optical neuropathy (GON) and to compare the results with traditional means of treatment. Material and methods. A study of 70 patients (114 eyes), whose average age was 66.7+ 6.2 years old, suffered from POAG with compensated I0P. The diagnosis of the disease was made on the basis of anamnesis, clinical and instrumental studies. All patients studied were divided into 2 groups. Results. Treatment in both studied groups showed a positive effect on the improvement of biochemical parameters. So, the speed of products lipid peroxidation accumulation decreased from initial by 75.0% and 53.4%, for 77.2%
and 43.3%, for 73.8 and 60.2% according to the l-lll stages of POUG (P<0.001). Conclusion. The use of Retinalamin in the complex treatment of patients with glaucomatous optical neuropathy has an antioxidant effect, reduces the activity of PA2 and the level of MSM in patients with GON.
The article describes the devices for determining the concept of intellectual dust used in industrial enterprises, workplaces and residential areas and the principle of their operation, and analyzes their operation technology.
In the process of teaching electrical engineering, visualization plays an important role in the transfer of knowledge about electric current. The main purpose of the lesson is to enrich the imagination, especially in practical exercises, and to put into practice the new knowledge acquired by students in the imagination of the mind. Managing the learning process using the best teaching methods will further improve the quality of education.
Radiation protection is a critical concern in nuclear facilities, and the use of effective shielding materials is essential to prevent exposure to harmful radiation. This study investigates the potential of using Sb2O3-doped soda-lime glasses as a radiation shielding material. The glasses were prepared by the conventional melt-quenching method, and their physical, optical, and radiation shielding properties were characterized. The results demonstrate that the addition of Sb2O3 dopant to the glass matrix enhances its shielding capability against gamma rays. The attenuation coefficient increased with increasing dopant concentration, and the glasses exhibited good optical transparency in the visible range. The study suggests that Sb2O3-doped soda-lime glasses have the potential to be used as an effective radiation shielding material in nuclear facilities.
In the article, the amount of micro- and macro-elements in two types of glauconite produced during the industrial processing of licorice root from Beruni district of Karakalpakstan was studied based on the inductively coupled coil optical emission spectrometry method and compared with those in the literature. The obtained results were used to study the amount of macroelements K and R necessary for plants in the composition of soil and glauconite, and it was shown that it is possible to produce new types of organomineral fertilizers based on them. It has been shown that the processing of licorice root in our republic can solve the problems of disposal of industrial waste.
Based on the obtained results, the scientific basis of organomineral fertilizer production was developed based on the studied glauconite and wastewater and licorice root industrial waste.
The article presents the results of the clinical efficacy of the calculation formula with the correction factor of the optical force of the intraocular lens in children with congenital cataracts at risk of development of pseudophakic myopia. Personalized Rm corrective coefficient in the formula for calculating the force of IOL in children with risk of development of pseudophakic myopia makes it possible to achieve target refraction in 83.3% cases and reduce the development of reduce myopic refraction.
The formation of nanosized particles in pure silica glass irradiated in water in the reactor core with fast neutrons up to 1019 cm-2 and gamma radiation has been studied by optical spectroscopy and X-ray diffraction. Irradiation with neutrons leads to the destruction of the initial mesostructure of a - and β - quartz with dimensions of 1.7 and 1.2 nm and the formation of cristobalite and tridymite nanocrystallites with dimensions of 16 and 8 nm in displacement thermal peaks.
The aim of this work was an optical coherence tomography study to assess the state of the optic nerve in contusion of the eye. In 12 patients with eye contusion, an OCT study of the retina and optic nerve of the injured and fellow eye was performed. The layer of nerve fibers and ganglion cells of the retina was measured. Thus, broad-spectrum SS-OCT allowed us to obtain a wide-spectrum image of the macula and peripapillary areas, which is useful for monitoring various sequential developmental conditions in patients with TON as well as those with TON.
Ikki diapazonli optik modulyatsiya va stimulyatsiya qilingan Brillouin tarqalishiga asoslangan optik vektor analizatori, shuningdek, OptiSystem dasturiy muhitida uni simulyatsiya qilish imkoniyati ko'rib chiqiladi.
Защитная (окрашенная) оболочка жесткого оптического волокна выполняет две основные функции: предупреждает потери световой энергии, распространяющейся вдоль волокна при отражениях от поверхности раздела световедущей жилы и светозащитной оболочки, а также служит оптической изоляцией единичного волокна в пучке оптических волокон.
The article presents the principles that are incorporated in the methods, as well as the methods themselves used to study the cornea: biomicroscopy, pachymetry, topographic keratotopography, optical coherence tomography, confocal microscopy and endothelial biomicroscopy. The use of traditional and modern high-tech methods of corneal examination allows for early and differential diagnosis in complex clinical cases, monitoring of treatment, as well as predicting the course and outcomes of corneal diseases
"Perfection is achieved not when there is nothing to add, but when there is nothing to remove" Antoine de Saint-Exupery Presents the results of a study of the performance of aesthetic and artistic restorations and the study of these dental restorations after a certain time with the naked eye and binoculars of two types, while the use of a SLR camera was a prerequisite. Comparative analysis has shown that the use of optical systems during dental manipulations significantly improves the diagnosis of carious and non-carious lesions, facilitates work and reduces the risk of various complications. Clinical photographs are an important component of aesthetic dentistry.
Purpose. To analyze optical and biometric indicators of children's eyes with various stages of congenital juvenile glaucoma (CJG) combined with myopia. Material and methods. We examined 17 patients (31 eyes) aged 11 to 17 (averagely 14.0 ± 0.2 years) diagnosed with CYG who underwent, prior to surgical or conservative treatment, a regular ophthalmological examination supplemented with the measurement of the central corneal thickness (on an automatic contactless tonometer-pachymeter by NIDEK, USA), and the index of corneal deformation (ICD) by the Shkrebets technique. Results. The analysis showed a possible correlation between 1) tonometric intraocular pressure (P) and the axial length of the eye, 2) P t and the ratio of excavation to optic disk diameter (E/ON), 3) axial length of the eye and the central corneal thickness at the terminal CYG stage, and 4) the axial length and the refraction at the initial stage of CYG. Conclusion. As the glaucomatous process progresses, children with CYG combined with myopia show an increase of myopic refraction, a decrease in fibrous membrane rigidity, pretrabecular and trabecular changes, axial elongation, increased IOP due to an imbalance between the production of intraocularfluid and its outflow, an expansion of the excavation of the optic disk and a decrease in the central corneal thickness.