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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.
Progressive retinal atrophy (PRA) is a group of genetic diseases seen in certain breeds of dogs and, more rarely, cats. Similar to retinitis pigmentosa in humans, [1] it is characterized by the bilateral degeneration of the retina, causing progressive vision loss culminating in blindness.
Not attributable to another disorder International Headache Society [ 7 ] Migraine without aura, classified as common migraine, represents a recurrent headache disorder characterized by moderate to severe throbbing pain, typically unilateral, and devoid of preceding visual or sensory disturbances known as auras.
Everything you need to know about whale eyes in dogs, including what the behavior means and what to do if you spot it.
Rage syndrome is a rare seizure disorder in dogs, characterized by explosive aggression. [1] [2] [3]It is frequently confused with idiopathic aggression, a term for aggression with no identifiable cause.
An ocular manifestation of a systemic disease is an eye condition that directly or indirectly results from a disease process in another part of the body. There are many diseases known to cause ocular or visual changes.
Using dogs, Martin Seligman and his colleagues pioneered the study of depression in the animal model of learned helplessness at the University of Pennsylvania. Dogs were separated into three groups, the control group, group A had control over when they were being shocked and group B had no control over when they were being electrocuted. After ...
Glaucoma in a dog. 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 glauco