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Coats' disease is thought to result from breakdown of the blood-retinal barrier in the endothelial cells, resulting in leakage of blood products containing cholesterol crystals and lipid-laden macrophages into the retina and subretinal space.
Viral conjunctivitis manifests as a fine, diffuse pinkness of the conjunctiva which may be mistaken for iritis, but corroborative signs on microscopy, particularly numerous lymphoid follicles on the tarsal conjunctiva, and sometimes a punctate keratitis are seen. [citation needed]
This list of dog diseases is a selection of diseases and other conditions found in the dog. Some of these diseases are unique to dogs or closely related species, while others are found in other animals, including humans.
inflamed pterygium [9] – a benign, triangular, horizontal growth of the conjunctiva, arising from the inner side, at the level of contact of the upper and lower eyelids, associated with exposure to sunlight, low humidity and dust. It may be more common in occupations such as farming and welding.
Hyperaemia (also hyperemia) is the increase of blood flow to different tissues in the body. It can have medical implications but is also a regulatory response , allowing change in blood supply to different tissues through vasodilation (widening of blood vessels ).
Close-up of prolapsed gland in small breed dog. KCS is not common in dogs, affecting one per cent of the dog population. [9] KCS is a chronic degenerative conjunctivitis that can lead to impaired vision and blindness. [2] KCS has a wide array of causes including drug toxicity, cherry eye, previous surgery, trauma, and irradiation. [2]
When infected with AHC, patients will experience painful, red eyes, swelling of the conjunctival tissue, and frequent mucus discharge from the eyes accompanied by excessive tearing and subconjunctival hemorrhaging. This hemorrhaging is caused by the rupture of blood vessels beneath the conjunctiva giving the eyes a bright red appearance.
The most common side effect is conjunctival hyperemia, which occurs in 4 to 20% of patients. Less common side effects include stinging of the eyes, headache, and respiratory infections. Rare side effects are dyspnoea (breathing difficulties), worsening of asthma, and macular oedema. [2] [3] [4]
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