Corneal Ulcer
Corneal Ulcer - Related Videos
08:37
Corneal Donor Tissue Preparation for Endothelial Keratoplasty
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Cited by 31 •
2012
Endothelial corneal transplantation is a surgical technique for treatment of posterior corneal diseases. Mechanical microkeratome dissection to prepare tissue results in thinner, more symmetric grafts with less endothelial cell loss and improved outcomes. Dissections can be performed at the eye bank prior to corneal transplantation surgery.
10:52
An Alkali-burn Injury Model of Corneal Neovascularization in the Mouse
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Cited by 75 •
2014
Neovascularization (NV) of the cornea can complicate multiple visual pathologies. Utilizing a controlled, alkali-burn injury model, a quantifiable level of corneal NV can be produced for mechanistic study of corneal NV and evaluation of potential therapies for neovascular disorders.
04:11
Laser-assisted Selective Ablation of Porcine Corneal Endothelial Cells: A Technique to Induce Focused Porcine Corneal Endothelial Injury for Ex Vivo Studies
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2025
This video demonstrates a non-invasive laser-assisted procedure to selectively damage the corneal endothelial cells in the porcine eye. The developed ex vivo model of endothelial cell damage can be used to study diseases of the corneal endothelium.
01:27
Peptic Ulcer
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2026
Peptic ulcers are erosive lesions of the gastric or duodenal lining, most commonly caused by Helicobacter pylori infection. This Gram-negative, helical bacterium has adapted to survive the stomach’s acidic environment by producing urease, which converts urea into ammonia and carbon dioxide. The ammonia neutralizes gastric acid in the bacterium’s immediate environment, allowing colonization of the gastric mucosa. H. pylori attaches to mucus-secreting epithelial cells, penetrates the mucus...
09:05
In Vitro and In Vivo Models to Study Corneal Endothelial-mesenchymal Transition
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Cited by 7 •
2016
A primary culture of bovine corneal endothelial cells was used to investigate the mechanism of corneal endothelial-mesenchymal transition. Furthermore, a rat corneal endothelium cryoinjury model was used to demonstrate corneal endothelial-mesenchymal transition in vivo.
FAQs
Damage to the corneal epithelium removes a protective surface barrier, allowing infectious organisms to reach the underlying stroma. The resulting inflammatory response can combine with direct tissue destruction, so the lesion may progress beyond a superficial surface problem. This mechanism explains why a corneal ulcer can threaten vision and why prompt medical assessment is important.
Risk rises when contact lenses are misused, when ocular surface disease weakens the eye’s normal defenses, or when trauma disrupts the epithelium. These factors do not represent identical causes: they create opportunities for bacteria, fungi, parasites, or viruses to enter damaged tissue and initiate inflammation. Identifying the relevant risk context helps clinicians interpret the presentation.
Pain, redness, tearing, light sensitivity, and reduced vision reflect the eye’s response to corneal injury and inflammation, but their combination also signals potential functional impact. Reduced vision is especially important clinically because damage in this transparent surface can interfere with sight. Symptoms therefore warrant evaluation rather than being treated as routine irritation.
Bacteria, fungi, parasites, and viruses can all be involved, yet the source of infection influences the antimicrobial approach. Clinical examination alone may not provide enough direction, so microbiological testing is used alongside examination to guide treatment. Matching management to the suspected infectious cause helps limit ongoing tissue destruction and supports preservation of vision.
Evaluation begins with clinical examination of the eye, followed by microbiological testing when additional information is needed to guide treatment. Together, these approaches provide a basis for selecting antimicrobial management. The purpose is not simply to confirm an abnormality, but to act promptly against the process before scarring, perforation, or further visual loss develops.
Microbiological testing is valuable when clinicians need information to guide antimicrobial treatment, particularly because several pathogen groups may be responsible. Testing complements rather than replaces clinical examination, creating a basis for management that addresses infection while limiting tissue destruction. In medicine, this combined assessment supports timely decisions aimed at reducing scarring or perforation and preserving sight.
Management is directed toward limiting the consequences of progressive corneal injury, including scarring, perforation, and loss of vision. Prompt attention matters because the condition is vision-threatening, and antimicrobial treatment is guided by clinical examination and microbiological testing. This makes the ulcer relevant not only as an eye infection, but also as an urgent problem in sight preservation.