Bibliografías temáticas / Ciliary Body, injuries

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Literatura académica sobre el tema "Ciliary Body, injuries"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 1 de febrero de 2022

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Artículos de revistas sobre el tema "Ciliary Body, injuries"

González-Riquelme, María José, Caridad Galindo-Romero, Fernando Lucas-Ruiz, Marina Martínez-Carmona, Kristy T. Rodríguez-Ramírez, José María Cabrera-Maqueda, María Norte-Muñoz, Manuel Vidal-Sanz y Marta Agudo-Barriuso. "Axonal Injuries Cast Long Shadows: Long Term Glial Activation in Injured and Contralateral Retinas after Unilateral Axotomy". International Journal of Molecular Sciences 22, n.º 16 (7 de agosto de 2021): 8517. http://dx.doi.org/10.3390/ijms22168517.

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Background: To analyze the course of microglial and macroglial activation in injured and contralateral retinas after unilateral optic nerve crush (ONC). Methods: The left optic nerve of adult pigmented C57Bl/6 female mice was intraorbitally crushed and injured, and contralateral retinas were analyzed from 1 to 45 days post-lesion (dpl) in cross-sections and flat mounts. As controls, intact retinas were studied. Iba1+ microglial cells (MCs), activated phagocytic CD68+MCs and M2 CD206+MCs were quantified. Macroglial cell changes were analyzed by GFAP and vimentin signal intensity. Results: After ONC, MC density increased significantly from 5 to 21 dpl in the inner layers of injured retinas, remaining within intact values in the contralateral ones. However, in both retinas there was a significant and long-lasting increase of CD68+MCs. Constitutive CD206+MCs were rare and mostly found in the ciliary body and around the optic-nerve head. While in the injured retinas their number increased in the retina and ciliary body, in the contralateral retinas decreased. Astrocytes and Müller cells transiently hypertrophied in the injured retinas and to a lesser extent in the contralateral ones. Conclusions: Unilateral ONC triggers a bilateral and persistent activation of MCs and an opposed response of M2 MCs between both retinas. Macroglial hypertrophy is transient.

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Li, Xiaoli. "Ultrasound Biomicroscopy Diagnosis Analysis and Fine Care of Anterior Segment Injury of Traumatic Anterior Chamber Based on Intelligent Virtual Reality Technology". Journal of Healthcare Engineering 2021 (11 de mayo de 2021): 1–12. http://dx.doi.org/10.1155/2021/9930686.

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The front part of the eye is exposed to the surface of the body, making it susceptible to injury. Blunt eye injuries often destroy the tissue structure in the anterior part of the eye. Often there is detachment of the iris root, separation of the ciliary body, the angle of retraction of the chamber, and complete dislocation or subluxation of the lens. Ordinary ocular ultrasound can penetrate into opaque tissue, but because of its low resolution, it can only show its outline, which is still very small for doctors in assisting diagnosis. Ultrasonic biomicroscopy is a very real-time analysis, will not be affected by the refraction space, and has great application value for ocular trauma. Based on this, this article proposes the ultrasound biomicroscope diagnosis analysis and fine nursing research of traumatic anterior chamber injury based on intelligent virtual reality technology. This article describes literature methods, experimental analysis methods, and other methods, in-depth study of the causes of traumatic anterior injuries, ultrasound biomicroscopy, and other theoretical knowledge, ultrasound biomicroscopy and microcontrol experiments for traumatic anterior injury design, and finally the causes of eye damage. This study compares the pairing results of ultrasound biomicroscopy biological measurements, analyzes the relationship between anterior bleeding level and anterior ocular injury, and analyzes the outcome and extent of service ophthalmology. The angle retreat accounted for 52.17% in grade I, 72.22% in grade II, and 60% in grade III. Anterior bleeding can cause single or complex iris root detachment, iris root detachment, ciliary body detachment, and angular leakage. The more the bleeding, the more serious the eye damage.

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Kalinichenko, Roman Vladimirovich, N. N. Arestova y N. S. Egiyan. "PATHOLOGY OF THE VITREOUS BODY IN CHILDREN. POSSIBILITIES OF INSTRUMENTAL AND LASER SURGERY". Russian Pediatric Ophthalmology 13, n.º 2 (15 de junio de 2018): 87–98. http://dx.doi.org/10.18821/1993-1859-2018-13-2-87-98.

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Despite the rather active use of YAG-laser surgery in adult patients, it is practically not used on children. At the same time, some children have a vitreous pathology what can be operate with laser surgery - changes in the vitreous body can be a manifestation of the congenital persistent fetal vasculature syndrome, retinopathy of prematurity, effects of the injuries, operations and uveitis. The opacites and synechia forming of the vitreous body reduce acuity and often adduce to the traction, which can lead to detachment of the retina, ciliary body, progress of eye subatrophy. The review presents the main pathological conditions of the vitreous body with syndromes, congenital and systemic diseases in children, the possibilities of instrumental and laser vitreal surgery in children. A literature search for the review was conducted using the Medline and RINC database.

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Kononov, A. V., E. V. Klyushnikova, N. V. Mitrofanova y V. A. Motyleva. "Surgical treatment of traumatic injuries of the ciliary body with the use of platelet-rich plasma. (clinical case)". Modern technologies in ophtalmology, n.º 2 (27 de abril de 2020): 165–67. http://dx.doi.org/10.25276/2312-4911-2020-2-165-167.

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Razaghi, Reza y Hasan Biglari. "A comparative numerical study to compute ocular injury in boxing". Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology 234, n.º 2 (9 de diciembre de 2019): 125–35. http://dx.doi.org/10.1177/1754337119889747.

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Sport is responsible for between 25% and 40% of all eye injuries. Trauma is integrated to the nature of the sport, especially boxing, which is considered a high-risk sport for ocular injuries. Boxing not only brings about injury to the external side of the eye, but in nearly one third of cases, the intraocular components of the eye are also damaged, followed by serious visual acuity complications. However, so far there is a paucity of knowledge on the ocular injury as a result of a strong hook to the face during boxing. This study was, therefore, aimed to perform a dynamic finite element simulation to calculate the stresses and deformations to the components of the eye (i.e. the cornea, aqueous body, iris, ciliary body, vitreous body, sclera, retina, and optic nerve) as a consequence of a hook to the zygomatic and frontal skull bones of a boxer. To do that, well-verified finite element models of the human skull, eye, and punch developed by the current authors were employed to simulate the traumatic model of the skull. The resulting von Mises stresses and deformations in each component of the eye were calculated and compared. The results revealed higher stresses in the components of the eye as a result of a frontal impact compared to that of the zygomatic one. The concentration of the von Mises stresses in the eye components was mostly located in the lateral circumference of the globe. Regardless of the impact sites, the muscle experienced severe damage while the cornea, as the most anterior, and optic nerve, as the most posterior components of the eye, stayed safe with trivial amounts of stress and deformation. These results have implications not only for understanding the possible ocular injuries from a hook but also for providing comprehensive information to medical experts regarding the types of ocular injuries which may occur during boxing.

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Shirzadi, Hooman, Hassan Zohoor y Sadegh Naserkhaki. "Biomechanical simulation of eye-airbag impacts during vehicle accidents". Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 232, n.º 7 (10 de junio de 2018): 699–707. http://dx.doi.org/10.1177/0954411918778063.

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Airbags are safety devices in vehicles effectively suppressing passengers’ injuries during accidents. Although there are still many cases of eye injuries reported due to eye-airbag impacts in recent years. Biomechanical approaches are now feasible and can considerably help experts to investigate the issue without ethical concerns. The eye-airbag impact–induced stresses/strains in various components of the eye were found to investigate the risk of injury in different conditions (impact velocity and airbag pressure). Three-dimensional geometry of the eyeball, fat and bony socket as well as the airbag were developed and meshed to develop a finite element model. Nonlinear material properties of the vitreous body and sclera were found through the in vitro tests on ovine samples and for the other components were taken from the literature. The eye collided the airbag due to the velocity field in the dynamic explicit step in Abaqus. Results of compression tests showed a nonlinear curve for vitreous body with average ultimate stress of 22 (18–25) kPa. Tensile behavior of sclera was viscoelastic nonlinear with ultimate stresses changing from 2.51 (2.3–2.7) to 4.3 (4–4.6) MPa when loading strain rate increased from 10 to 600 mm/min. Sclera, ciliary body, cornea and lens were the eye components with highest stresses (maximum stress reached up to 9.3 MPa). Cornea, retina and choroid experienced the highest strains with the maximum up to 14.1%. According to the previously reported injury criteria for cornea, it was at high risk of injury considering both stress and strains. Reduced pressure of the airbag was beneficial decreased stress of all components. Comprehensive investigations in this area can disclose biomechanical behavior of the eye during eye-airbag impact. Effective guidelines can be drawn for airbag design for instance the airbag pressure which reduces risk of eye injury.

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Tereshchenko, Alexander V., Elena V. Erokhina y Denis P. Volodin. "Ultrasound biomicroscopy in ophthalmology". Ophthalmology Journal 14, n.º 1 (9 de junio de 2021): 63–73. http://dx.doi.org/10.17816/ov41999.

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This review presents data on the use of the method of ultrasonic biomicroscopy (UBM) of the anterior segment of the eye in ophthalmological practice in adults and children. Ultrasound biomicroscopy (UBM) is a contact non-invasive method for visualizing structures of the anterior segment of the eye using high-frequency ultrasound in the range from 35 to 100 MHz. Literature data indicate that UBM can be used to visualize almost all structures of the anterior segment, including the cornea, iridocorneal angle, anterior chamber, iris, ciliary body and lens, as well as the peripheral parts of the retina, vasculature and vitreous. There is data on the use of this method in the study of pathogenetic aspects of glaucoma, pseudoecfoliative syndrome, various types of cataracts, post-traumatic injuries of the anterior segment of the eye, meimobium gland dysfunction and other ophthalmopathologies. The use of UBM in children, due to the peculiarities of its implementation, is not widespread, but due to the specificity of the data obtained using it, it is promising. The limited information about the use of UBM in retinopathy of prematurity and the diagnostic capabilities of the method makes its use especially relevant in this severe retinal disease of premature newborns.

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London, Anat, Elena Itskovich, Inbal Benhar, Vyacheslav Kalchenko, Matthias Mack, Steffen Jung y Michal Schwartz. "Neuroprotection and progenitor cell renewal in the injured adult murine retina requires healing monocyte-derived macrophages". Journal of Experimental Medicine 208, n.º 1 (10 de enero de 2011): 23–39. http://dx.doi.org/10.1084/jem.20101202.

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The death of retinal ganglion cells (RGCs) is a hallmark of many retinal neuropathies. Neuroprotection, axonal regeneration, and cell renewal are vital for the integrity of the visual system after insult but are scarce in the adult mammalian retina. We hypothesized that monocyte-derived macrophages, known to promote healing in peripheral tissues, are required after an insult to the visual system, where their role has been largely overlooked. We found that after glutamate eye intoxication, monocyte-derived macrophages infiltrated the damaged retina of mice. Inhibition of this infiltration resulted in reduced survival of RGCs and diminished numbers of proliferating retinal progenitor cells (RPCs) in the ciliary body. Enhancement of the circulating monocyte pool led to increased RGC survival and RPC renewal. The infiltrating monocyte-derived macrophages skewed the milieu of the injured retina toward an antiinflammatory and neuroprotective one and down-regulated accumulation of other immune cells, thereby resolving local inflammation. The beneficial effect on RGC survival depended on expression of interleukin 10 and major histocompatibility complex class II molecules by monocyte-derived macrophages. Thus, we attribute to infiltrating monocyte-derived macrophages a novel role in neuroprotection and progenitor cell renewal in the injured retina, with far-reaching potential implications to retinal neuropathies and other neurodegenerative disorders.

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Choovuthayakorn, Janejit, Pimploy Chavengsaksongkram, Nawat Watanachai y Winai Chaidaroon. "Penetrating Eyelid and Ocular Fishhook-Related Injury". Case Reports in Ophthalmology 10, n.º 1 (24 de enero de 2019): 41–46. http://dx.doi.org/10.1159/000496382.

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Purpose: To report removal techniques and outcomes for a patient with penetrating eyelid and cornea complicating localized retinal detachment from a fishhook. Methods: This is a case report of a 35-year-old man who presented with a fishhook embedded in his right upper eyelid and globe while participating in a fishing competition. On initial examination, his right eyelid was opened with difficulty and limited evaluation could be performed. Results: In an operating room, a shank was transected and removed from a lacerated eyelid by a back-out technique. Then, a barbed hook was noticed to penetrate through temporal peripheral cornea, iris, and entrapped within ciliary body behind the lens. A successful surgical removal of a fishhook was performed within a primary operation. After that, additional operations to repair injured ocular tissues including a localized retinal detachment were performed. The patient achieved a best-corrected visual acuity of 20/20 at 10-month follow-up. Conclusions: The visual prognosis for a fishhook-related ocular injury is associated with various variables including size and location of lacerated wound and technique to remove a fishhook. In this case, a patient could achieve a favorable final visual and anatomical outcome. This removal technique could be taken into consideration when encountering a fishhook-related eye injury patient.

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Żuk, Maksym, Ekaterina Lobashova, Olga Żuk y Sławomir Wierzba. "Efficacy of systemic administration of riboflavin on a rabbit model of corneal alkali burn". Scientific Reports 10, n.º 1 (14 de octubre de 2020). http://dx.doi.org/10.1038/s41598-020-74484-0.

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Abstract Changes in the barrier mechanisms in the eye should determine the rational route for the administration and dosage of each drug in the treatment of traumatic injuries and other pathologies. The aim of this study was to examine the efficacy of intra-arterial delivery of 14C-riboflavin (as an “indicator”) and compare it with intravenous and intramuscular administration in an animal model of chemical eye burn. 14C-riboflavin (14C-I) was administered by intra-arterial (carotid artery), intravenous (femoral vein) and intramuscular (femoral muscle) routes. The total radioactivity was determined over 2 h in the plasma and structures of the rabbit’s eyes using a scintillation counter. The results of the study show that intravascular administration of 14C-I gives significantly higher concentrations of total radioactivity in the blood and is accompanied by a significant increase in the permeability of the blood-barrier and barrier in eyes suffering from burns. The highest concentration in the plasma and aqueous humour of the anterior chamber of the eye was observed during the first hour with the intra-arterial route of administration of 14C-I in either burnt and unburnt eyes. The distribution of total radioactivity in the structures of the eye over the 2 h of the experiment showed a higher level of the drug under intra-arterial administered in the uveal regions, namely: the iris, ciliary body, choroid, retina and also the sclera and cornea. This experimental model shows that intra-arterial administration can increase the bioavailability of a drug to the structures of the eye within a short period of time.

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Capítulos de libros sobre el tema "Ciliary Body, injuries"

Gurelik, Gokhan y Sabahattin Sul. "Current Concepts and Management of Severely Traumatized Tissues in the Inner Coatings (The Posterior Segment: The Ciliary Body, the Choroid, and the Retina) of the Globe: Mechanical Injuries (Open Globe Without Intraocular Foreign Body and Without Endophthalmitis)". En Current Concepts and Management of Eye Injuries, 75–92. London: Springer London, 2016. http://dx.doi.org/10.1007/978-1-4471-7302-1_6.

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Unal, Melih y Akın Cakır. "Current Concepts and Management of Severely Traumatized Tissues in the Inner Coatings (The Posterior Segment: The Ciliary Body, the Choroid and the Retina) of the Globe: Nonmechanical Injuries". En Current Concepts and Management of Eye Injuries, 135–54. London: Springer London, 2016. http://dx.doi.org/10.1007/978-1-4471-7302-1_10.

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Ozdek, Sengul y Murat Hasanreisoglu. "Current Concepts and Management of Severely Traumatized Tissues in the Inner Coatings (the Posterior Segment: the Ciliary Body, the Choroid, and the Retina) of the Globe: Mechanical Injuries, Perforating Injury". En Current Concepts and Management of Eye Injuries, 107–18. London: Springer London, 2016. http://dx.doi.org/10.1007/978-1-4471-7302-1_8.

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Ünver, Yaprak Banu y Ziya Kapran. "Current Concepts and Management of Severely Traumatized Tissues in the Inner Coatings (The Posterior Segment: The Vitreous, the Retina, the Choroid, and the Ciliary Body) of the Globe: Mechanical Injuries (Closed-Globe Injuries)". En Current Concepts and Management of Eye Injuries, 119–33. London: Springer London, 2016. http://dx.doi.org/10.1007/978-1-4471-7302-1_9.

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Actas de conferencias sobre el tema "Ciliary Body, injuries"

Stitzel, Joel D., Gail A. Hansen y Stefan M. Duma. "Modeling Elderly Eye Injuries in Automobile Crashes". En ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-43454.

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Eye injuries have been shown to be greater in the elderly population as a possible cause of this greater incidence. Three separate impact scenarios simulating a foam particle (30 m/s), a streering wheel (15 m/s), and an air bag (67 m/s), were applied to a finite element eye model in order to reveal the effects of aging on the eye when subjected to blunt trauma. The lens stiffness of the model was varied according to human lens stiffness values determined for each age group. The computational eye model demonstrated that increased risk was associated with the increasing stiffness of the lens, producing up to a 120% larger stress in the ciliary body.

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