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Journal articles on the topic 'Cornea Keratoconus. LASIK (Eye surgery)'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Abdolahian, Milad, Mohammad Ali Moalem, Mohammadreza Jahady Hoseiny, Farsad Noorizadeh, and Athar Zareei. "Keratorefractive Surgery Outcomes in Keratoconus Suspect Patients." Journal of Ophthalmology 2020 (December 2, 2020): 1–11. http://dx.doi.org/10.1155/2020/8823744.

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Purpose. To examine the outcomes of keratorefractive surgeries in keratoconus suspect patients. Methods. This study included 192 keratoconus suspects (351 eyes), treated with photorefractive keratectomy (PRK) (211 eyes), Lasik (96 eyes), and Femto-Lasik (44 eyes) surgeries in an eye clinic. The best spectacle-corrected visual acuity (BSCVA) and subjective refraction were evaluated preoperatively and postoperatively (three months and five years after the procedure). The Orbscan II topography system was also used preoperatively and five years after the procedure. Results. The patients’ mean age

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Tatar, Mehmet Gurkan, Feride Aylin Kantarci, Aydin Yildirim, et al. "Risk Factors in Post-LASIK Corneal Ectasia." Journal of Ophthalmology 2014 (2014): 1–4. http://dx.doi.org/10.1155/2014/204191.

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Purpose. To evaluate the risk factors for post-laser in situ keratomileusis (LASIK) ectasia.Materials and Methods. Medical records of 42 eyes of 28 (10 women, 18 men) patients who developed corneal ectasia after LASIK were retrospectively reviewed. Topographical features and surgical parameters of those patients were evaluated.Results. The mean age of patients was34.73±6.50(23–48) years and the mean interval from LASIK to the diagnosis of post-LASIK ectasia was36.0±16.92(12–60) months. The following factors were determined as a risk factors: deep ablation (>75 μm) in 10 eyes, FFK (forme fru

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Valbon, Bruno Freitas, Juliana Glicéria, Rodrigo Santos, and Milton Ruiz Alves. "Unilateral Corneal Ectasia after Bilateral LASIK: The Thick Flap Counts." International Journal of Keratoconus and Ectatic Corneal Diseases 2, no. 2 (2013): 79–83. http://dx.doi.org/10.5005/jp-journals-10025-1056.

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ABSTRACT Purpose To report a case of post-LASIK corneal ectasia due to a thick flap, while the contralateral eye did not develop ectasia after an incomplete deep flap cut, followed by a thinner flap LASIK procedure. Methods Case report Results This 45 years old female patient had bilateral myopic LASIK in 1999. Preoperative anterior curvature map was regular with no signs of keratoconus. Central keratometry was 42.88 × 44.70 @ 163 in OD and 43.43 × 45.24 @ 175 in OS. Ultrasound central corneal thickness was 586 μm and 619 μm in the right eye and left eye, respectively. Corneal OCT identified a

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Surkova, V. K., A. R. Khalimov, and G. M. Kazakbaeva. "Keratectasias and modern methods of their treatment." POINT OF VIEW. EAST – WEST, no. 2 (May 31, 2021): 84–88. http://dx.doi.org/10.25276/2410-1257-2021-2-84-88.

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The review article provides non-surgical (spectacle and contact correction, ultraviolet corneal crosslinking) and surgical methods (corneal transplantation, intrastromal implantation of segments and rings) for the treatment of keratoectasias and, in particular, keratoconus. The authors present their own original developments of scientists from the Ufa Research Institute of Eye Diseases in the field of cross-linking and various types of keratoplasty, as well as promising areas of clinical research on the combined treatment of keratectasias: cross-linking in combination with LASIK, intrastromal

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Hayes, Sally, Siân R. Morgan, and Keith M. Meek. "Keratoconus: cross-linking the window of the eye." Therapeutic Advances in Rare Disease 2 (January 2021): 263300402110035. http://dx.doi.org/10.1177/26330040211003573.

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Keratoconus is a condition in which the cornea progressively thins and weakens, leading to severe, irregular astigmatism and a significant reduction in quality of life. Although the precise cause of keratoconus is still not known, biochemical and structural studies indicate that overactive enzymes within the cornea break down the constituent proteins (collagen and proteoglycans) and cause the tissue to weaken. As the disease develops, collagen fibres slip past each other and are redistributed across the cornea, causing it to change shape. In recent years, it was discovered that the photochemic

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Song, Yinyu, Lihua Fang, Ruirui Du, Luchao Lin, and Xingming Tao. "The corneal biomechanical changes after SMILE and LASIK refractive surgery were compared based on finite element analysis." E3S Web of Conferences 271 (2021): 03045. http://dx.doi.org/10.1051/e3sconf/202127103045.

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The three-dimensional (3D) finite element model of human eye was established, and the intraocular pressure (IOP) was loaded to simulate refractive surgery. The biomechanical properties of human cornea after SMILE and LASIK surgery were studied from the stress, strain and induced wavefront aberration. Our results showed that SMILE had less impact on the biomechanics, having less stress and strain changes than LASIK. However, the stress and strain of the cornea increased with the increase of the diopter and were concentrated in the central region. We also investigated the changes in wavefront ab

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Hefner-Shahar, Hagar, and Nir Erdinest. "High-order Aberrations in Keratoconus." International Journal of Keratoconus and Ectatic Corneal Diseases 5, no. 3 (2016): 128–31. http://dx.doi.org/10.5005/jp-journals-10025-1133.

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ABSTRACT With all the technological advances today and the increasing number of people undergoing refractive surgery, the importance of detecting keratoconus (KC) prior to surgery has become evident. Although by using a topographer we can detect early stage KC, however, by using wavefront analysis technology, we are able to detect KC at an even earlier stage. Every eye possesses a number of aberrations. However, in a KC patient's eye, there are approximately five to six times the numbers of high-order aberrations (HOAs) than in a healthy eye. Using this technology to detect and assess the HOAs

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Shilova, T. Yu. "ReLEx® SMILE® – the third generation of laser eye surgery." EYE GLAZ 22, no. 4(132) (2020): 52–58. http://dx.doi.org/10.33791/2222-4408-2020-4-52-58.

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ReLEx® (Refractive lenticule extraction) SMILE® (SMall Incision Lenticula Extraction) is the third generation of laser eye surgery, which is a follow-on to PRK (the first generation) and LASIK (the second generation). This technology has expanded the possibilities for the comfort and safety of the procedure, reduced the requirements for the thickness of the cornea, and made it extremely comfortable for the patient. SMILE® method helps improve vision in case of myopia, myopic and mixed astigmatism. The article analyzes the advantages and disadvantages of this technology, its possible risks and

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Panova, I. E., A. V. Titov, and D. R. Mirsaitova. "Tear Replacement Therapy in Medical Support of Patients after Femto-LASIK Keratorefractive Surgery." Ophthalmology in Russia 17, no. 2 (2020): 274–80. http://dx.doi.org/10.18008/1816-5095-2020-2-274-280.

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Purpose — to analyze the effectiveness of artificial tear drops HYLOPARIN-COMOD® in the complex medical support of the FemtoLASIK operation based on monitoring of clinical, functional and morphometric indicators of the eye surface’s condition. Patients and methods. The study included 25 patients (50 eyes) who underwent a keratorefractive surgery (Femto-LASIK) and were prescribed instillations of artificial tear drops HILOPARIN-COMOD®. To analyze the effectiveness of artificial tear drops HYLOPARIN-COMOD® in the complex medical support of the Femto-LASIK operation based on monitoring of clinica

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Crouzier, David, Vincent Dabouis, Edgar Gentilhomme, et al. "Chronic Electromagnetic Exposure at Occupational Safety Level Does Not Affect the Metabolic Profile nor Cornea Healing after LASIK Surgery." Journal of Ophthalmology 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/762364.

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LASIK eye surgery has become a very common practice for myopic people, especially those in the military. Sometimes undertaken by people who need to keep a specific medical aptitude, this surgery could be performed in secret from the hierarchy and from the institute medical staff. However, even though the eyes have been previously described as one of the most sensitive organs to electromagnetic fields in the human body, no data exist on the potential deleterious effects of electromagnetic fields on the healing eye. The consequences of chronic long-lasting radar exposures at power density, in ac

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Yingmei, Jiang, Jin Tao, Yang Xueqi, et al. "An Analysis on the Change Rule of Eyeball's Biological Parameters of Different Types in the Refraction State and Vision Before and After Refraction." Journal of Medical Imaging and Health Informatics 8, no. 9 (2018): 1881–85. http://dx.doi.org/10.1166/jmihi.2018.2532.

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The ametropia is the most widespread eye disease for the humans. Wherein, the myopia is the commonest ophthalmological reason influencing the distant vision. The excimer laser corneal refractive surgery has always been an operation mode most widely used in myopic correction operations for a number of years. The laser assisted in-situ keratomi (LASIK) mainly transforms the frontal surface appearance of the cornea to change the corneal refraction power, and its correction effect is influenced by a great many factors such as regression and hydration of cornea. Thus, a lot of surgeons would combin

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Hezekiah, James Deva Koresh, and Shanty Chacko. "A Review on Cornea Imaging and Processing Techniques." Current Medical Imaging Formerly Current Medical Imaging Reviews 16, no. 3 (2020): 181–92. http://dx.doi.org/10.2174/1573405615666181204125406.

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Background: Measuring cornea thickness is an essential parameter for patients undergoing refractive Laser-Assisted in SItu Keratomileusis (LASIK) surgeries. Discussion: This paper describes about the various available imaging and non-imaging methods for identifying cornea thickness and explores the most optimal method for measuring it. Along with the thickness measurement, layer segmentation in the cornea is also an essential parameter for diagnosing and treating eye-related disease and problems. The evaluation supports surgical planning and estimation of the corneal health. After surgery, the

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Kornilosvskiy, I. M. "Factors of Cataractogenesis in Laser Corneal Refractive Surgery." Ophthalmology in Russia 16, no. 1S (2019): 112–17. http://dx.doi.org/10.18008/1816-5095-2019-1s-112-117.

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Purpose: to consider the main factors that stimulate cataractogenesis and the earlier development of cataracts after laser refractive surgery of the cornea. Patients and methods. The clinical material covers observations of the condition in more than 10 thousand eyes from 1 year to 20 years, after various laser refractive corneal operations (PRK, TransPRK, LASIK, FemtoLASIK). Results. Risk factors for cataractogenesis included high initial ametropia, accommodation disturbance, age, and increased external UV exposure. Clinical observations have shown that with laser correction of high degrees o

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Eskina, Erika N., and Victoria A. Parshina. "Results of presbyopia correction with multifocal profile application on the cornea by photorefractive keratectomy in hyperopic patients." Ophthalmology journal 10, no. 2 (2017): 13–21. http://dx.doi.org/10.17816/ov10213-21.

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Purpose. To compare efficacy, safety and predictability of hyperopia and presbyopia simultaneous correction by photorefractive keratectomy (PRK) with application of a bi-aspheric multifocal profile on the cornea using PresbyMax software, and hyperopia correction by LASIK. Methods. 25 patients (50 eyes) of the 1st group were operated by PRK with bi-aspheric multifocal profile application on the cornea using PresbyMax software for simultaneous hyperopia and presbyopia correction. The 2nd group included 25 patients (50 eyes) operated by LASIK with aspheric profile application on the cornea for co

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Dhaliwal, Deepinder K. "Updates and Challenges in Refractive Lens Exchange." US Ophthalmic Review 11, no. 1 (2018): 17. http://dx.doi.org/10.17925/usor.2018.11.1.17.

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Refractive lens exchange (RLE) is frequently used as a refractive surgical procedure for the correction of high presbyopia and high hyperopia, for which laser-assisted in situ keratomileusis (LASIK), photorefractive keratectomy (PRK) or phakic intraocular lens (IOL) refractive surgery is unsuitable. In an expert interview, Deepinder K Dhaliwal, Professor of Ophthalmology at the University of Pittsburgh School of Medicine, Director of Cornea and Refractive Surgery at the UPMC Eye Center, and Associate Medical Director of the Charles T Campbell Ocular Microbiology Laboratory, discusses the chall

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Severinsky, Boris. "Silicone Hydrogel Miniscleral Contact Lenses after Corneal Collagen Crosslinking for Post-LASIK Keratoectasia." International Journal of Keratoconus and Ectatic Corneal Diseases 3, no. 3 (2014): 127–29. http://dx.doi.org/10.5005/jp-journals-10025-1092.

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ABSTRACT Purpose To report successful visual rehabilitation of post refractive surgery keratoectasia shortly after corneal collage crosslinking (CXL) procedure achieved with silicone hydrogel mini-scleral (SHmS) contact lens. Materials and methods A 29-year-old woman attended to our clinic with complaints on decreased vision in her left eye. Twelve years earlier she underwent bilateral laser-assisted in situ keratomileusis (LASIK) procedure for myopia correction. Corneal topography revealed bilateral central keratoectasia with maximal keratometry values of 55.4 Diopter (D) for her right eye an

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Altinkurt, Emre, Ozkan Avci, Orkun Muftuoglu, Adem Ugurlu, Zafer Cebeci, and Kemal Turgay Ozbilen. "Logistic Regression Model Using Scheimpflug-Placido Cornea Topographer Parameters to Diagnose Keratoconus." Journal of Ophthalmology 2021 (May 18, 2021): 1–7. http://dx.doi.org/10.1155/2021/5528927.

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Purpose. Diagnose keratoconus by establishing an effective logistic regression model from the data obtained with a Scheimpflug-Placido cornea topographer. Methods. Topographical parameters of 125 eyes of 70 patients diagnosed with keratoconus by clinical or topographical findings were compared with 120 eyes of 63 patients who were defined as keratorefractive surgery candidates. The receiver operating character (ROC) curve analysis was performed to determine the diagnostic ability of the topographic parameters. The data set of parameters with an AUROC (area under the ROC curve) value greater th

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Pinna, A., M. Salvo, S. Dore, and F. Carta. "Corneal Graft Rejection after Penetrating Keratoplasty for Keratoconus in Turner's Syndrome." European Journal of Ophthalmology 15, no. 2 (2005): 271–73. http://dx.doi.org/10.1177/112067210501500216.

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Purpose To report a patient with Turner's syndrome who developed graft rejection after penetrating keratoplasty (PK) for keratoconus and to review the ophthalmic literature on the association between keratoconus and Turner's syndrome. Methods A woman with bilateral keratoconus and Turner's syndrome (45,XO) was referred for progressive visual loss in the right eye. Best-corrected visual acuity was 20/400 in the right eye. Slit-lamp examination revealed corneal thinning with ectatic protrusion of the central cornea and Vogt's striae in the right eye. The patient underwent PK in the right eye in

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Ortiz, J. P. D., C. B. S. Lisbão, F. L. C. Brito, B. Martins, and J. L. Laus. "Superficial keratectomy and 360º conjunctival flap for bullous keratopathy in a dog: a case report." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 63, no. 3 (2011): 773–77. http://dx.doi.org/10.1590/s0102-09352011000300036.

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A case of a two-year-old male Pinscher with a history of discomfort in the right eye was reported. The left eye had been enucleated by the referring veterinarian due to the same symptom with unsuccessful clinical treatment. The Schirmer tear test value was elevated and a decreased intraocular pressure was observed by applanation tonometry. Biomicroscopy revealed profuse corneal edema and keratoconus and fluorescein staining was negative. Gonioscopy and ophthalmoscopy did not provide any relevant data due to the corneal alterations. Bullous keratopathy was diagnosed. Surgery was performed in tw

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Ivanova, A. V., A. S. Sklyarova, K. B. Letnikova, A. T. Khandzhyan, and N. V. Khodzhabekyan. "Simultaneous topography-guided photorefractive keratectomy with accelerated collagen cross-linking in the treatment of stage I keratoconus." Russian Ophthalmological Journal 12, no. 4 (2019): 28–34. http://dx.doi.org/10.21516/2072-0076-2019-12-4-28-34.

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Purpose: to evaluate the efficiency of simultaneous topography-guided photorefractive keratectomy (PRK) with accelerated collagen cross-linking in the treatment of stage I keratoconus.Material and methods. 38 patients (49 eyes) aged 18 to 44 with stage I keratoconus were treated with simultaneous topography-guided PRK combined with accelerated corneal collagen crosslinking. Along with standard ophthalmological testing, patients underwent aberrometry, confocal microscopy, optical coherence tomography of the cornea, imaging of the anterior eye section on a Scheimpflug analyzer, and examination o

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Obraztsova, M. R., I. A. Mushkova, and N. V. Maychuk. "Application of the method of accelerated ultraviolet crosslinking of corneal collagen using a customized protective contact lens without an ultraviolet filter in a patient with secondary keratoectasia after Lasik (a clinical case)." Modern technologies in ophtalmology, no. 2 (June 15, 2021): 71–74. http://dx.doi.org/10.25276/2312-4911-2021-2-71-74.

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Purpose. To evaluate the clinical and functional results of the technique of ultraviolet crosslinking on the thin cornea using a customized soft contact lens without an ultraviolet filter in a patient with secondary corneal ectasia. Material and methods. Under observation was patient S., 32 years old, diagnosed with secondary keratoectasia of the left eye after LASIK surgery, performed in 2008 for moderate myopia. To stabilize the keratectatic process, complicated by the presence of a thin cornea with a thickness of less than 400 microns, an operation was performed: ultraviolet crosslinking of

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Pradhan, Asik, Kishore Raj Pradhan, Gauri Shankar Shrestha, Purushottam Dhunganga, and Raju Kaiti. "Contrast sensitivity before and after small incision lenticule extraction and femtosecond laser in situ keratomileusis." Asian Journal of Ophthalmology 16, no. 4 (2019): 284–92. http://dx.doi.org/10.35119/asjoo.v16i4.417.

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Introduction: Contrast sensitivity function after laser ablation of the cornea in refractive surgery is an important tool for measuring quality of visual function. The effect of small incision lenticule extraction (SMILE) and femtosecond laser in situ keratomileusis (FS-LASIK) on visual function can be compared by measuring spatial contrast sensitivity. Purpose: This study was to compare contrast sensitivity function in patients undergoing refractive surgery for myopia at Tilganga Institute of Ophthalmology. Methods: In a retrospective study, 15 subjects who underwent refractive su

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Kalkan Akcay, Emine, Murat Akcay, Betul Seher Uysal, et al. "Impaired Corneal Biomechanical Properties and the Prevalence of Keratoconus in Mitral Valve Prolapse." Journal of Ophthalmology 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/402193.

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Objective. To investigate the biomechanical characteristics of the cornea in patients with mitral valve prolapse (MVP) and the prevalence of keratoconus (KC) in MVP.Materials and Methods. Fifty-two patients with MVP, 39 patients with KC, and 45 control individuals were recruited in this study. All the participants underwent ophthalmologic examination, corneal analysis with the Sirius system (CSO), and the corneal biomechanical evaluation with Reichert ocular response analyzer (ORA).Results. KC was found in six eyes of four patients (5.7%) and suspect KC in eight eyes of five patients (7.7%) in

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Maslennikov, Vyacheslav Igorevich, Sergey Alekseyevich Koskin, Yuriy Yevgenyevich Shelepin, and Aleksandr Vladimirovich Yan. "A corneal surface study in patients after laser keratomilesis." Ophthalmology journal 6, no. 3 (2013): 32–36. http://dx.doi.org/10.17816/ov2013332-36.

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The cornea of the human eye is not only refracts the light, but also acts as a convex mirror, which reflects the surroundings. In ophthalmology, an image reflected by its anterior surface is known as the 1st Purkinje image. Characteristics of this image are determined by the properties of the light source and the state of corneal surface. At the present time, there are many methods in ophthalmology to study various properties of the cornea, but most of them either require expensive equipment or are qualitative and not informative. Meanwhile, a “shining” characteristic of the cornea in general

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Ioshin, I. E. "Phacoemulsification and calculation of intraocular lenses in patients given keratorefractive surgery. Part 1." Russian Ophthalmological Journal 14, no. 2 (2021): 55–58. http://dx.doi.org/10.21516/2072-0076-2021-14-2-55-58.

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Rationale.Qualitative rehabilitation of patients with cataracts who had keratorefractive surgeries depends on phacoemulsification technology and correctly calculated optical power of the IOL. Purpose: present the author’s own approaches to the development of surgical tactics for treating patients with cataracts who underwent keratorefractive surgeries. Material and methods. The complicated character of cataract surgery performed after LASIK — deterioration of visualization due to the presence of an optical ablation zone and a transition zone (6–7 mm) — is successfully compensated by instillati

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Dehghan, Behrouz, Mohammadnaeem Aminifard, and Zahra Raisi. "Analysis of causes and outcomes of corneal transplantation in al-zahra eye hospital in southeast of Iran from 2011-2016." International Journal of Research in Medical Sciences 5, no. 7 (2017): 2917. http://dx.doi.org/10.18203/2320-6012.ijrms20172598.

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Background: Corneal transplantation is known as the most successful and common type of organ transplant, but it calls for more intensive and long-term care. Given the lack of adequate information on this important surgery in this province and the differences between indications and causes of corneal transplantation, the present research was carried out to examine the causes and outcomes of corneal transplant in patients visiting Al-Zahra eye hospital who had received donated cornea in the past five years.Methods: In a retrospective analytical-descriptive study 135 files of 149 eyes that had go

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Jiang, Xue. "Deterioration of Avellino corneal dystrophy in a Chinese family after LASIK." International Journal of Ophthalmology 14, no. 6 (2021): 795–99. http://dx.doi.org/10.18240/ijo.2021.06.02.

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AIM: To reveal the importance of TGFBI gene screening for candidates with a family history of corneal disease or granular opacities in corneal stroma before refractive surgery. METHODS: A 37-year-old male (proband) underwent bilateral laser-assisted in situ keratomileusis (LASIK) in 2002, with right vision decreased significantly in 2006. The proband and other 32 members of the family underwent a detailed ophthalmic examination, including vision acuity, intraocular pressure, slit-lamp photograph, fundus examination, optical coherence tomography (OCT) of cornea, and in vivo confocal microscope

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Shaker, Lina M., Ahmed A. Al-Amiery, Abdul Amir H. Kadhum, and Mohd S. Takriff. "Manufacture of Contact Lens of Nanoparticle-Doped Polymer Complemented with ZEMAX." Nanomaterials 10, no. 10 (2020): 2028. http://dx.doi.org/10.3390/nano10102028.

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Many people suffer from myopia or hyperopia due to the refractive errors of the cornea all over the world. The use of high refractive index (RI), Abbe number (νd), and visible light transmittance (T%) polymeric contact lenses (CLs) holds great promise in vision error treatment as an alternative solution to the irreversible laser-assisted in situ keratomileusis (LASIK) surgery. Titanium dioxide nanoparticles (TiO2 NPs) have been suggested as a good candidate to rise the RI and maintain high transparency of a poly(methyl methacrylate) (PMMA)-TiO2 nanocomposite. This work includes a preparation o

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Osipyan, G. A., and Kh Khrayst. "Possibilities of Intralamellar Keratoplasty in Rehabilitation of Keratoconus Patients." Ophthalmology in Russia 16, no. 2 (2019): 169–73. http://dx.doi.org/10.18008/1816-5095-2019-2-169-173.

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Keratoconus is one of the topical problems in modern ophthalmology. Among the currently used treatment methods is intralamellar keratoplasty that utilizes allomaterials or homotransplants. The surgery technique has obvious advantages over penetrating and deep anterior lamellar keratoplasty. There is no risk of tissue incompatibility, the recovery period is shorter, and prolonged use of corticosteroids is not necessary. In recent years, technological development has made the application of femtosecond laser a standard procedure for various surgical interventions on the cornea, particularly for

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Reis, José RC, Alberto Diniz-Filho, and Fábio M. Rocha. "Pathogenesis of Fixed Dilated Pupil (Urrets-Zavalía Syndrome) after Deep Lamellar Keratoplasty in Keratoconus." International Journal of Keratoconus and Ectatic Corneal Diseases 5, no. 1 (2016): 32–34. http://dx.doi.org/10.5005/jp-journals-10025-1118.

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ABSTRACT Purpose To present a case series of patients that developed Urrets-Zavalia syndrome (UZS) after deep anterior lamellar keratoplasty (DALK) for treating keratoconus and discuss the mechanisms for the syndrome. Materials and methods Retrospective chart analysis of patients who developed UZS after DALK at the Cornea Unit, Hospital São Geraldo, Federal University of Minas Gerais. Results We present a series of 3 patients with features consistent with UZS, after undergoing DALK. Elevated intraocular pressure (IOP) was noted in the early postoperative period in 2 cases, despite the fact tha

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Kalinnikov, Yu Yu, N. P. Sobolev, S. V. Novikov, A. V. Zinov’eva, and D. V. Nevrov. "Clinical and Functional Outcomes of Lens-Iris Diaphragm Implantation with Simultaneous Subtotal Penetrating Keratoplasty: a 15-Year Follow-Up Case Report." Ophthalmology in Russia 16, no. 1 (2019): 102–8. http://dx.doi.org/10.18008/1816-5095-2019-1-102-108.

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Combined traumatic injuries of the anterior eye segment are attributed to the severe consequences of the injured organ of vision. Iris defects result in spherical and chromatic aberrations, diplopia, flares, severe photophobia, cosmetic defects, and significantly reduced visual acuity after the injury. The literature describes various methods to restore visual functions impaired as a result of aniridia. Use of an artificial iris together with an intraocular lens pathology results in optimal reconstruction and recovery of normal anterior segment anatomy and topography. In this paper, we provide

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Chuprov, A. D., Yu V. Kanyukova, and A. E. Voronina. "On the Possibility of Expanding Indications for Refractive Correction of Ametropia (4 Clinical Cases)." Ophthalmology in Russia 15, no. 2S (2018): 174–78. http://dx.doi.org/10.18008/1816-5095-2018-2s-174-178.

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Refractive surgery is a dynamically developing field of ophthalmic surgery, which requires studying new approaches for determining indications and contraindications for refractive surgery.Purpose. To investigate the possibility of expanding indications for refractive surgery in conditions related to contraindications on the example of four clinical cases.Material and methods. The study included 4 clinical cases of photorefractive operations in patients with relative contraindications who underwent refractive surgery (Femto-Lasik, photorefractive keratectomy (PRK), phototherapeutic keratectomy

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Stroyko, M. S., S. V. Kostenev та A. L. Pakhomova. "Сorrection of Corneal Astigmatism in Patients with a Thin Cornea by Improved Combined Technology". Ophthalmology in Russia 15, № 2S (2018): 166–73. http://dx.doi.org/10.18008/1816-5095-2018-2s-166-173.

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Purpose:to carry out an advanced combined technology, including femtosecond astigmatic keratotomy and topographically-oriented photorefractive keratectomy in order to correct corneal astmigmatism in patients with a thin cornea. Presentation and evaluation of the results of this observation.Patients and methods. There are data of 19 patients (30 eyes) with complex myopic astigmatism combined with a thin cornea who received the operation of femtosecond astigmatic keratotomy (the first stage of an improved combined technology). Mean values before surgery: sph –4.1 ± 2.1 (from –0.3 to –7.8) D, cyl

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Pérez-Cambrodí, Rafael J., and Pedro Ruiz-Fortes. "Reverse Geometry Hybrid Contact Lens Fitting in a Case of Donor-Host Misalignment after Keratoplasty." International Journal of Keratoconus and Ectatic Corneal Diseases 2, no. 2 (2013): 69–72. http://dx.doi.org/10.5005/jp-journals-10025-1054.

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ABSTRACT Purpose To report the successful outcome obtained after fitting a new hybrid contact lens in a cornea with an area of donor-host misalignment and significant levels of irregular astigmatism after penetrating keratoplasty (PKP). Materials and methods A 41-year-old female with bilateral asymmetric keratoconus underwent PKP in her left eye due to the advanced status of the disease. One year after surgery, the patient referred a poor visual acuity and quality in this eye. The fitting of different types of rigid gas permeable contact lenses was performed, but with an unsuccessful outcome d

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Mashige, K. P. "A review of corneal diameter, curvature and thickness values and influencing factors*." African Vision and Eye Health 72, no. 4 (2013). http://dx.doi.org/10.4102/aveh.v72i4.58.

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The cornea is an important ocular structure involved in the mediation of visual perception. It is the principal refractive surface of the eye and vision can be significantly affected by relatively small changes in its structure and parameters. Measurement of corneal parameters is important in the diagnosis and management of ocular diseasessuch as keratoconus and glaucoma, and also in the fitting of contact lenses or with refractive surgery such as Laser-Assisted in situ Keratomileusis(LASIK) and photorefractive keratectomy (PRK). The human corneal diameter, anterior curvature and centre thickn

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"BEYOND PSEUDO-ACCOMODATIVE CORNEA LASIK (PAC LASIK). A PERSONAL INSIGHT." International Journal of Case Reports, 2021, 200. http://dx.doi.org/10.28933/ijcr-2021-01-3005.

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Laser in-situ keratomieleusis (LASIK) is a common intervention for young, active, ametropic individuals to improve their visual acuity. pseudo-accommodative cornea (PAC), a variant of LASIK, to correct ametropia among presbyopic patients is proven in maintaining good distant vision; yet, the satisfactory spectacle free reading vision is limited to the ageing progression. However, successful treatments do not guarantee patient’s satisfaction. Assesment of the objective topographic indicators, visual acuity, higher order abrasion, and contrast sensitivity; revealed the clarification of a mild he

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Cruz, Giovanna Karinny Pereira, Isabelle Campos de Azevedo, Diana Paula de Souza Rego Pinto Carvalho, Allyne Fortes Vitor, Viviane Euzébia Pereira Santos, and Marcos Antonio Ferreira Júnior. "Clinical and epidemiological aspects of cornea transplant patients of a reference hospital." Revista Latino-Americana de Enfermagem 25 (2017). http://dx.doi.org/10.1590/1518-8345.1537.2897.

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ABSTRACT Objective: clinically characterizing cornea transplant patients and their distribution according to indicated and post-operative conditions of cornea transplantation, as well as estimating the average waiting time. Method: a cross-sectional, descriptive and analytical study performed for all cornea transplants performed at a reference service (n=258). Data were analyzed using Statistical Package for the Social Sciences, version 20.0. Results: the main indicator for cornea transplant was keratoconus. The mean waiting time for the transplant was approximately 5 months and 3 weeks for el

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Kato, Naoko, Takeshi Ide, Hidenaga Kobashi, and Ikuko Toda. "Infectious keratitis after corneal crosslinking for keratoconus caused by levofloxacin-resistant microorganisms." BMC Ophthalmology 21, no. 1 (2021). http://dx.doi.org/10.1186/s12886-021-02081-4.

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Abstract Introduction We present seven cases of infectious keratitis after corneal crosslinking (CXL) to attenuate keratoconus progression. Methods Of 524 consecutive patients who underwent CXL, 7 cases (4 males and 3 females; 21.5 ± 7.1 years) developed postoperative infectious keratitis were retrospectively reviewed. CXL was performed using the Dresden protocol or an accelerated protocol involving epithelial removal. Results All cases appeared normal on the day after surgery, but subsequently developed eye pain, blurred vision, corneal infiltration, inflammation of the anterior chamber, and

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Roy, Abhijit Sinha, and William J. Dupps. "Patient-Specific Modeling of Corneal Refractive Surgery Outcomes and Inverse Estimation of Elastic Property Changes." Journal of Biomechanical Engineering 133, no. 1 (2010). http://dx.doi.org/10.1115/1.4002934.

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The purpose of this study is to develop a 3D patient-specific finite element model (FEM) of the cornea and sclera to compare predicted and in vivo refractive outcomes and to estimate the corneal elastic property changes associated with each procedure. Both eyes of a patient who underwent laser-assisted in situ keratomileusis (LASIK) for myopic astigmatism were modeled. Pre- and postoperative Scheimpflug anterior and posterior corneal elevation maps were imported into a 3D corneo-scleral FEM with an unrestrained limbus. Preoperative corneal hyperelastic properties were chosen to account for mer

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