Oftalmologiya最新文献

{"title":"Evaluation of the Impact of Mid-Infrared Laser Radiation on Eye Tissues (Experimental Study)","authors":"Yu. N. Yusef, D. V. Petrachkov, E. N. Korobov, I. A. Novikov, M. V. Kravchik","doi":"10.18008/1816-5095-2023-3-508-514","DOIUrl":"https://doi.org/10.18008/1816-5095-2023-3-508-514","url":null,"abstract":"Purpose — to study the effect of a mid-infrared laser with a wavelength of 3.0 μm on the eye tissue. Materials and methods . An experimental laser device “Laser scalpel in the middle infrared range 2–8 μm for precision surgery” was used. The range of the radiation spectrum generated by this laser coincides with the spectral absorption peaks of such biological tissue chromophores as water, proteins and cholesterol esters, which makes it possible to use this laser in precision surgery (ophthalmology, neurosurgery, vascular surgery). In this study, we chose a wavelength of 3 µm, which coincides with the peak of the spectral absorption of water. The retina, choroid, sclera of porcine and cadaveric eyes was used as biological tissue. The effect of laser radiation on tissue was carried out in air. The application of coagulates was performed in different modes: 1) single pulses, 2) continuous mode. The impact of laser radiation on eye tissues was assessed using a scanning electron microscope. Results . When exposed to a single laser pulse with an energy of even 1 mJ, a through defect of the retina was observed. When exposed to a single laser pulse on the choroid with an energy of 1 to 3 mJ, the depth of the crater was 110–130 µm, the width of the crater was 97–122 µm, and the zone of collateral damage was 22–28 µm. When exposed to a single laser pulse on the sclera with an energy of 1 to 3 mJ, the depth of the crater was 170–201 µm, the width of the crater was 260–303 µm, and the zone of collateral damage was 57–72 µm. With continuous exposure to laser radiation on the choroid and sclera, the depth, width of the coagulate, the zone of collateral damage with similar laser parameters were greater than with a single pulse. Conclusion . Using this laser at a wavelength of 3 μm, it is possible to dissect eye tissues, which can be useful in vitreoretinal surgery for retinotomy, cutting out the choroid-pigment epithelium complex, and in antiglaucoma surgery for non-penetrating deep sclerectomy. However, further research is needed to optimize such laser parameters as the number of pulses in a packet, pulse duration, and pulse energy.","PeriodicalId":37645,"journal":{"name":"Oftalmologiya","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135900679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical Coherence Tomography Based Differentiation of Intravitreal Particles in Posterior Uveitis and Vitreous Hemorrhage","authors":"Ya. A. Kalinicheva, A. N. Kulikov, D. S. Maltsev","doi":"10.18008/1816-5095-2023-3-485-490","DOIUrl":"https://doi.org/10.18008/1816-5095-2023-3-485-490","url":null,"abstract":"Purpose : to study optical coherence tomography (OCT) characteristics of intravitreal particles in vitreous hemorrhage and posterior uveitis. Patients and methods. 29 patients with posterior uveitis (43.1 ± 19.4 years, 10 females and 19 males) and 29 patients with vitreous hemorrhage (62.3 ± 11.6 years, 9 females and 20 males) were included. All patients received standard ophthalmological examination and multimodal imaging, including OCT. The size and reflectivity of preretinal intravitreal particles was assessed on crosssectional OCT scans. Results : Intravitreal particles in eyes with posterior uveitis had a statistically significantly larger size compared to the particles in vitreous hemorrhage, 47.0 ± 29.0 and 41.3 ± 22.6 pixels, respectively (p < 0.001). At the same time, intravitreal particles in eyes with posterior uveitis had lower mean reflectivity compared with eyes with vitreous hemorrhage, 126.0 ± 10.5 and 135.2 ± 11.1, respectively (p < 0.001). The maximum reflectivity of intravitreal particles in eyes with posterior uveitis was also lower than that of particles in eyes with vitreous hemorrhage, 186.2 ± 24.9 and 166.3 ± 23.7, respectively (p < 0.001). Conclusion . Intravitreal particles displayed with OCT in posterior uveitis are less reflective and larger than those in vitreous hemorrhage.","PeriodicalId":37645,"journal":{"name":"Oftalmologiya","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135901023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical and Diagnostic Efficiency of the Study of the Quality of Life According to the Questionnaires PHEC-22 and Catquest-9SF after Bilateral Cataract Phacoemulsification and Monofocal IOL Implantation","authors":"V. V. Neroev, N. I. Ovechkin","doi":"10.18008/1816-5095-2023-3-497-501","DOIUrl":"https://doi.org/10.18008/1816-5095-2023-3-497-501","url":null,"abstract":"Purpose : сomparative clinical and diagnostic efficiency of the quality of life (QОL) according to the PHEC-22 and Catquest-9SF questionnaires after bilateral cataract phacoemulsification and monofocal IOL implantation. Patients and Methods . We observed 148 patients with binocular cataract (mean age 58.6 ± 1.8 years). All patients underwent standard cataract phacoemulsification with implantation of a monofocal IOL. Patients were examined before and after (one month after surgery on the second eye) surgery. The results of the survey on the questionnaires PHEC-22 and Catquest-9SF were evaluated by the general indicator of testing (GIT) as the sum of points for all questions (taking into account the “weight” coefficients in the questionnaire PHEC-22). Along with this, each of the patients underwent a study of binocular BCVA. Results. A statistically significantly higher clinical and diagnostic efficiency of the PHEC-22 questionnaire compared to Catquest-9SF was established, which is confirmed by a higher (by 0.17 rel. units, p < 0.01) level of correlation with BCVA, as well as a higher probability of compliance of the QOL level with the BCVA range, especially at low (0.4 and less rel. units, by 18.5 %, p < 0.01) and medium (0.5–0,8 relative units, by 7.3 %, p < 0.05) values of BCVA, while in the range of BCVA 0.9–1.0 relative units, no significant differences between the questionnaires were found (p > 0.05). Conclusion . The results of a comparative study after bilateral cataract phacoemulsification and monofocal IOL implantation using the PHEC-22 and Catquest-9SF questionnaires revealed a significantly higher clinical and diagnostic efficiency of the PHEC-22 questionnaire, which is associated with the methodological principles for developing a questionnaire based on the “social model” of health with the involvement of expert ophthalmologists and the use of the optimal procedure for scaling the patient’s responses. The results obtained (taking into account clinical normalization) allow us to recommend the PHEC-22 questionnaire for inclusion in the complex diagnosis of patients with cataracts both before and after surgery in solving a number of urgent problems — a comparative assessment of IOL, a study of the effectiveness of methods for postoperative rehabilitation of patients, the choice of the optimal formula for calculating IOL and some others.","PeriodicalId":37645,"journal":{"name":"Oftalmologiya","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135901025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Differential Diagnostic Indicators for the Appointment of Non-Steroidal Anti-Inflammatory Therapy in the Treatment of Red Eye Syndrome at the Stage of Primary Outpatient Admission. Part 2","authors":"V. N. Trubilin, E. G. Polunina, A. A. Kozhukhov, V. V. Kurenkov, N. V. Moreva, A. V. Trubilin, K. V. Chinenova","doi":"10.18008/1816-5095-2023-3-515-522","DOIUrl":"https://doi.org/10.18008/1816-5095-2023-3-515-522","url":null,"abstract":"In recent years, the Delphi method (DMt) has been widely used in scientific practice. It is based on an expert assessment of the object under study, which is formed on the basis of a survey of a group of experts in a particular field. The application of the Delphi method in various areas of ophthalmological practice has made it possible to develop practical recommendations for the diagnosis of visual stress, methods for diagnosing and treating keratoconus, to develop clinical guidelines for the diagnosis and treatment of patients with Sjögren’s syndrome, to classify the signs and symptoms of dry eye syndrome in accordance with the main mechanism of its occurrence and etc. A survey ophthalmologist expert conducted during the study, performed in accordance with the Delphi method, aimed at developing a differential algorithm in the treatment of patients with one of the most common pathologies among diseases belonging to the category of “red eye syndrome” — conjunctivitis, allowed identify key symptoms for prescribing different groups of drugs. In accordance with the clinical guidelines developed by the Russian Association of Ophthalmologists, the following groups of drugs are recommended for use: antibacterial, antiseptic, antihistamine, non-steroidal anti-inflammatory drugs, steroidal anti-inflammatory drugs, antiviral drugs. This article presents the results obtained in determining the indications for the use of non-steroidal anti-inflammatory therapy in the treatment of conjunctivitis. These include: the presence of a history of systemic diseases, the duration of inflammation for more than 7 days, the absence or presence of mucous discharge, complaints of a feeling of pain, discomfort in the eyes, their redness, as well as biomicroscopic signs of inflammation, which manifest themselves as mild to moderate conjunctival hyperemia expressiveness. The result obtained is of fundamental practical importance for primary outpatient ophthalmologists for choosing rational drug therapy in the treatment of one of the most common pathologies encountered in ophthalmic practice — conjunctivitis. A differentiated approach in choosing the volume and type of drug therapy based on the severity of the inflammatory process will reduce the drug load on the ocular surface. In accordance to the data presented in the first part of this article, it will lead to a decrease the risk of developing signs of dry eye syndrome against the background of a stopped inflammatory process in the long-term period and improving the quality of life in patients.","PeriodicalId":37645,"journal":{"name":"Oftalmologiya","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135900700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Possibilities for Hyposecretory Dry Eye Treatment","authors":"S. V. Yanchenko, A. V. Malyshev, G. R. Odilova, L. M. Petrosyan, M. Yu. Odilov","doi":"10.18008/1816-5095-2023-3-542-548","DOIUrl":"https://doi.org/10.18008/1816-5095-2023-3-542-548","url":null,"abstract":"Purpose : to evaluate the effectiveness of a fixed combination of 0.24 % hyaluronic acid, carbomer, glycerol and a lipid component in the hyposecretory dry eye treatment. Patients and methods . We examined 35 hyposecretory moderate dry eye (DE) patients in conditions of lipidaquas-mucin deficiency and meibomian gland dysfunction (MGD). All patients included in the study received instillations of a fixed combination of 0.24 % hyaluronic acid (in the form of sodium hyaluronate), carbomer, glycerol and a lipid component (in the form of medium chain triglycerides) — Artelak Night (3 times a day, 2 months). The main criterion for the effectiveness of therapy was the tear film brake up time (TBUT, Norn’s test, s). In addition, the dynamics of the following indicators were taken into account: OSDI (scores), “lid-wiper’ symptom (LWS, scores), lower tear meniscus height (LTMH, μm; OCT, OptoVue), Bijsterveld`s xerosis index (XI, scores; lyssamine green stained). Control points: at inclusion in the study; examination after 1 and 2 months of therapy. Statistics: calculation of the mean and its standard deviation (M ± s); assessment of the reliability of differences in indicators characterizing the state of the ocular surface before and after therapy (Wilcoxon t-test). Results . The patients showed a statistically significant increase in TBUT at the second and third control points, which indicated the effectiveness of DE therapy. The increase in TBUT was accompanied by a significant decrease in the severity of DE subjective symptoms at the same control points (OSDI). On the background of therapy, a trend towards a decrease in LWS was recorded, which was statistically insignificant. Apparently, a significant increase in TBUT and a decrease in OSDI were associated with a significant increase in LTMH at the third control point (decrease in the severity of aqua-deficiency) and a significant decrease in XI at the second and third control points (decrease in the severity of mucose-deficiency). Conclusion . A fixed combination of 0.24 % hyaluronic acid, carbomer, glycerol and a lipid component proved to be effective in the treatment of hyposecretory moderate DE in conditions of lipid-water-mucin deficiency, which was accompanied by a significant increase in TBUT and LTMH, as well as a decrease in OSDI and XI.","PeriodicalId":37645,"journal":{"name":"Oftalmologiya","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135900680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of Frequency and Nosology of Clinical Varieties of Retinal Dystrophies in Children and Adolescents","authors":"O. V. Kolenko, E. L. Sorokin, A. V. Sergeeva","doi":"10.18008/1816-5095-2023-3-491-496","DOIUrl":"https://doi.org/10.18008/1816-5095-2023-3-491-496","url":null,"abstract":"Background . Particular vigilance in timely detection of retinal dystrophies (RD) in children is necessary as effective measure to prevent formation of rhegmatogenous retinal detachment. Purpose . To study frequency and structure of clinical forms of RD in children of different age groups to find out most typical age of their primary formation, to assess the proportion of their prognostically hazardous forms. Materials and methods . Clinical material — 314 children aged 5 to 17 years, on average 11.0 ± 0.6 years, who applied with various ophthalmological pathologies in the Department of Pediatric Ophthalmology of the Khabarovsk Branch of the S. Fyodorov Eye Microsurgery Federal State Institution in the period from July 2020 to April 2021. All children underwent biomicroscopy, ophthalmoscopy with in-depth examination of the state of the equatorial and periphery parts of the retina in condition of maximum cycloplegia. All 4 quadrants of the fundus were examined using binocular indirect ophthalmoscope with 20D lens. The presence and frequency of RD, their clinical varieties, according to the classification of E.O. Saksonova (1979), were ascertained in each of the studied age groups. Their localization, their length, and eye refraction were also assessed. Results . Presence of RD was revealed in 34 (11 %) children. In structure of identified clinical forms of RD, 11 children had its prognostically non-hazardous forms of RD, 23 children had prognostically hazardous forms (33 % and 67 % respectively). According to our data, the earliest age of detection of RD was 6 years. Further progression of RD was noted in 2 out of 6 children after restrictive photocoagulation of prognostically hazardous forms of RD. Conclusion . Formation of RD occurs not only at puberty, but also at an earlier age, according to our data, from 6 years of age. In view of this, it is necessary to conduct a thorough ophthalmoscopic examination of the periphery parts of the retina, even in young children.","PeriodicalId":37645,"journal":{"name":"Oftalmologiya","volume":"292 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135900698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Precision of Calculating the Optical Power of the IOL in Various Methods of Out-Bag IOL Fixation","authors":"Yu. N. Yusef, A. S. Vvedenskiy, M. N. Ivanov, L. Alkharki, N. D. Fokina","doi":"10.18008/1816-5095-2023-3-465-470","DOIUrl":"https://doi.org/10.18008/1816-5095-2023-3-465-470","url":null,"abstract":"The calculation of the optical power of the IOl for out-bag implantation remains one of the actual problems of cataract surgery. Purpose. Comparative study of the precision of calculating the optical power of the IOL for retropupillary fixation of an iris-claw lens, transscleral fixation of a rigid IOL with two flexible haptic elements and transscleral fixation of an soft hydrophobic IOL with two open haptic elements. Patients and methods. The study included 105 patients (108 eyes) with complicated phacoemulsification in combination with lens subluxation. First group included 39 patients (42 eyes) with complicated phacoemulsification and retropupillary implantation of an iris-claw lens. Second group included 29 patients (29 eyes) with complicated phacoemulsification and transscleral suture fixation of rigid PMMA IOL. Third group included 37 patients (37 eyes) with complicated phacoemulsification and transscleral suture fixation of an soft hydrophobic IOL with two open haptic elements. In the postoperative period we performed a comparative evaluation of visual acuity without correction and best corrected visual acuity, IOL optical power calculation precision within ±0.5 diopters, the average absolute error of IOL optical power calculation. Results. Three months after the operation the visual acuity of 0.8–1.0 without correction was obtained in 35,7 % of cases in the 1st group, 17.2 % in the 2nd group, 16.2 % in the 3rd group. The precision of postoperative refraction within ±0.5 diopters was 95.2 % in the 1st group, 86.2 % in the 2nd group 83.7 % in the 3rd group. The average absolute error of IOL optical power calculation was 0.33 ± 0.07 diopters in the 1st group, 0.57 ± 0.18 diopters in the 2nd group, 0.62 ± 0.19 diopters in the 3rd group (р < 0.05). Three months after surgery there were no significant differences in best corrected visual acuity and the degree of induced astigmatism. Conclusion. Retropupillary implantation of an iris-claw lens during complicated phacoemulsification significantly increases visual acuity without correction, frequency calculation precision within ±0.5 diopters, significantly reduces the average absolute calculation error compared to transscleral suture fixation of the IOL.","PeriodicalId":37645,"journal":{"name":"Oftalmologiya","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134976949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Results of Scanning Electron Microscopy of an Explanted Hydrophilic Acrylic IOL with Hydrophobic Coating","authors":"G. V. Voronin, I. A. Novikov, M. N. Narbut, M. K. Bersunkaev","doi":"10.18008/1816-5095-2023-3-451-455","DOIUrl":"https://doi.org/10.18008/1816-5095-2023-3-451-455","url":null,"abstract":"This article presents a clinical case of intraocular lens (IOL) removal due to surface degeneration 2 years after implantation. Explantation was performed resulting from clinically significant clouding of the IOL and decreased visual acuity. The microscopic picture and microtopography of the explanted hydrophilic acrylic IOL with hydrophobic coating were studied using scanning electron microscopy. The opacities were total, located on the entire surface of the lens, including the supporting elements.","PeriodicalId":37645,"journal":{"name":"Oftalmologiya","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134978319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prospects for the Use of Monofocal IOLs with Extended Depth of Focus (EDOF) Instead of Traditional Multifocal (Trifocal) IOLs in Cataract Surgery","authors":"M. E. Konovalov, A. V. Morenko","doi":"10.18008/1816-5095-2023-3-460-464","DOIUrl":"https://doi.org/10.18008/1816-5095-2023-3-460-464","url":null,"abstract":"Purpose — a literature review of comparative studies of the clinical efficacy of IOLs based on extended depth of focus technology (EDOF) and trifocal IOLs (TFIOLs). Methods . Literature analysis was performed in the international database “PubMed”.The search keywords were “IOL with extended depth of focus (EDOF)”, “Trifocal IOL”, “Contrast sensitivity”, “Aberrometry”, “Defocus curve”. The choice of sources for the review was carried out in accordance with the criteria for prospective or retrospective studies. A total of 158 sources were analyzed, further using systematic review filters and the authors’ knowledge of the topic. The duration of the retrospective analysis was 8 years (2015–2022), some of the considered works were dated 2023. Results . The values of visual acuity for distance, near and at an intermediate distance in both studied groups did not differ significantly. When analyzing the defocusing curve, the preservation of visual acuity under load conditions from +1.0 to +3.0 diopters was determined for both types of IOL, respectively. At the same time, visual acuity was significantly better in the TPIOL group than in the EDOF group in the optical load range from -2.5 to -4.0 diopters. Most studies did not report significant difference between EDOF and TFIOL in terms of contrast sensitivity, the likelihood of postoperative “halo” effects, and “independence” of spectacle correction. The stated provisions are fully consistent with the results of the medical and technical evaluation of EDOF presented in the literature. Conclusion . The development of a new type of EDOF IOL seems to be a promising direction in cataract surgery, especially taking into account the possibility of using patients whose professional activities are associated with long-term visual work at intermediate distances (for example, users of personal computers). Further accumulation of clinical material is required in the context of the role and place of EDOF in the general system of aphakia correction, taking into account the IOL model and the conditions of the patient’s professional visual activity.","PeriodicalId":37645,"journal":{"name":"Oftalmologiya","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134976946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Corneal Topography Changes Following Deep Anterior Lamellar Keratoplasty in Patients with Keratoconus","authors":"S. Neslihan, Ç. Ümit, E. Ferhat, G. Selim","doi":"10.18008/1816-5095-2023-3-456-459","DOIUrl":"https://doi.org/10.18008/1816-5095-2023-3-456-459","url":null,"abstract":"Background . The aim of this study is to evaluate the morphologic changes of the cornea and anterior chamber by using corneal topography (CT) in patients undergoing deep anterior lamellar keratoplasty (DALK) due to keratoconus. Patients and methods. This observational case-control study included total 53 eyes of 53 patients with keratoconus and underwent DALK surgery. All patients were evaluated preoperatively and 3 months after suture removal with CT. In CT, anterior chamber depth (ACD), iridocorneal angle (ICA), anterior chamber volume (ACV), central corneal thickness (CCT), maximum keratometric value (Kmax), flattest simulated meridian keratometry (SimK1), steepest simulated meridian keratometry (SimK2) and simulated keratometry average (SimKavg) results were compared before and after DALK surgery. Results . A significant increase was observed in CCT values after DALK surgery (p < 0.001). Patients showed statistically significant decrease in Kmax, SimK1, SimK2 and SimKavg values (p < 0.001 for all). Postoperative ACD and ACV values were significantly lower (p < 0.001). The ICA values showed no significant difference (p = 0.183) between preoperative and postoperative values (49,95 ± 5,85 and 46,30 ± 11,33 respectively). Conclusion . We determined a dramatic decrease in keratometric values, ACD and ACV values and an increase of corneal thickness after DALK surgery. Although DALK can be performed without interfering with the anterior chamber, has a significant effect in anterior chamber.","PeriodicalId":37645,"journal":{"name":"Oftalmologiya","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134976947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}