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Canine glaucoma refers to a group of diseases in dogs that affect the optic nerve and involve a loss of retinal ganglion cells in a characteristic pattern. An intraocular pressure greater than 22 mmHg (2.9 kPa) is a significant risk factor for the development of glaucoma. Untreated glaucoma in dogs leads to permanent damage of the optic nerve ...
Characteristics. Symptoms include sudden permanent blindness, but may occur more slowly over several days, weeks or months, [3] dilated pupils. Pupillary light reflexes are usually reduced but present; the slow phase mediated by melanopsin in retinal ganglion cells is retained.
The symptoms of retinal dysplasia in dogs can range from subtle to overt, depending on the severity of the condition. In mild cases, dogs might not show any noticeable signs of visual...
Progressive vision loss in any dog in the absence of canine glaucoma or cataracts can be an indication of PRA. It usually starts with decreased vision at night, or nyctalopia. Other symptoms include dilated pupils and decreased pupillary light reflex.
Collie eye anomaly ( CEA) is a congenital, inherited, bilateral eye disease of dogs, which affects the retina, choroid, and sclera. It can be a mild disease or cause blindness. CEA is caused by a simple autosomal recessive gene defect. There is no treatment.
The symptoms of PSS in dogs can vary widely, often depending on the severity and type of shunt. Some dogs may display only mild signs, while others can have severe clinical symptoms.
Cortical blindness is the total or partial loss of vision in a normal-appearing eye caused by damage to the brain 's occipital cortex. [1] Cortical blindness can be acquired or congenital, and may also be transient in certain instances. [2] Acquired cortical blindness is most often caused by loss of blood flow to the occipital cortex from either unilateral or bilateral posterior cerebral ...
Streptococcus zooepidemicus — also known as Strep zoo — is a highly contagious pathogen that can cause serious illness in dogs. It is a gram-positive bacterium that is part of the ...
Ectropion in dogs usually involves the lower eyelid. Often the condition has no symptoms, but tearing and conjunctivitis may be seen. Breeds associated with ectropion include the Saint Bernard, the Bloodhound, the Clumber Spaniel, Newfoundlands, and the Neapolitan Mastiff. [3] It can also result from trauma or nerve damage.
Florida keratopathy, also known as Florida spots, is an eye condition characterized by the presence of multiple spots within both corneas. [1] It is most commonly seen in dogs and cats, but is also rarely seen in horses and birds. [2]