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A case of corneal opacity caused by atovaquone administration.
Am J Ophthalmol Case Rep
March 2025
Department of Ophthalmology and Visual Sciences, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, 852-8501, Japan.
Purpose: Atovaquone is an alternative drug that is used for the prevention and treatment of pneumonia when the first-line drug, sulfamethoxazole-trimethoprim (ST combination), cannot be used due to side effects. However, atovaquone is known to cause ocular side effects including oculomucocutaneous syndrome and vortex keratopathy. In this report, we describe a patient who developed bilateral white granular diffuse corneal opacity that extended from the corneal sub-epithelium to the stroma after continuous oral atovaquone administration for 14 months.
View Article and Find Full Text PDF3D printed biomimetic bilayer limbal implants for regeneration of the corneal structure in limbal stem cell deficiency.
Acta Biomater
January 2025
Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing 100005, China. Electronic address:
Limbal stem cell deficiency (LSCD) causes vision loss and is often treated by simple corneal epithelial cell transplantation with poor long-term efficiency. Here, we present a biomimetic bilayer limbal implant using digital light processing 3D printing technology with gelatin methacrylate (GelMA) and poly (ethylene glycol) diacrylate (PEGDA) bioinks containing corneal epithelial cells (CECs) and corneal stromal stem cells (CSSCs), which can transplant CECs and improve the limbal niche simultaneously. The GelMA/PEGDA hydrogel possessed robust mechanical properties to support surgical transplantation and had good transparency, suitable swelling and degradation rate as a corneal implant.
View Article and Find Full Text PDFInvestigation of the Ocular Response and Corneal Damage Threshold of Exposure to 28 GHz Quasi-millimeter Wave Exposure.
Health Phys
January 2025
Division of Vision Research for Environmental Health, Medical Research Institute and Department of Ophthalmology, Kanazawa Medical University, Kahoku, Japan.
Electromagnetic radiation energy at millimeter wave frequencies, typically 30 GHz to 300 GHz, is ubiquitously used in society in devices for telecommunications; radar and imaging systems for vehicle collision avoidance, security screening, and medical equipment; scientific research tools for spectroscopy; industrial applications for non-destructive testing and precise measurement; and military and defense applications. Understanding the biological effects of this technology is essential. We have been investigating ocular responses and damage thresholds comparing various frequencies using rabbit eyes and dedicated experimental apparatus.
View Article and Find Full Text PDFA deep dive into radiation keratopathy; Going beyond the current frontierss.
Exp Eye Res
January 2025
Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL, USA. Electronic address:
Radiotherapy is one of the conventional treatments for head and neck malignancies. Despite the implementation of protective measures to minimize the detrimental impact on healthy tissues surrounding the radiation site, radiation keratopathy remains a prevalent complication. We aimed to establish a mouse model of radiation keratopathy to characterize the pathophysiology of the disease and enable future identification of potential treatments.
View Article and Find Full Text PDFEccentric Superficial Anterior Lamellar Keratoplasty for Bilateral Limbal Stem Cell Deficiency.
Cornea
November 2024
External Diseases. Moorfield's Eye Hospital, London, United Kingdom.
Purpose: To describe and report the outcomes of allogeneic eccentric superficial anterior lamellar keratoplasty (SALK), a novel surgical technique, in the management of total bilateral limbal stem cell deficiency (LSCD).
Methods: Data were collected retrospectively on all patients with total bilateral LSCD who underwent SALK. Previous surgery, preexisting glaucoma, conjunctivalization, vascularization, lens status, and preoperative best-corrected visual acuity (BCVA) were collected from medical notes.
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