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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.
A coloboma, or hole, may form in or near the optic disc due to a failed closure of embryonic tissue. The degree of these abnormalities varies between individual dogs, and even between the same dog's eyes. [7] CEA is inherited as an autosomal recessive trait that has a penetrance reaching 100 percent. [8] A mutation in the NHEJ1 gene is ...
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
Everything you need to know about whale eyes in dogs, including what the behavior means and what to do if you spot it.
Retinal dysplasia is an eye disease affecting the retina of animals and, less commonly, humans. It is usually a nonprogressive disease and can be caused by viral infections, drugs, vitamin A deficiency, or genetic defects. Retinal dysplasia is characterized by folds or rosettes (round clumps) of the retinal tissue.
Eye problems – a range of eye conditions including in-turning or out-turning (entropian/ectropion) of the eyelids, glaucoma, cherry eye, and medial canthus pocketing. There is screening for some ...
The video showcases a scene that any dog lover would find irresistible: several dogs, exhausted from an hour of running hard at a local park, struggle to keep their eyes open during the ride back ...