Search results
Results from the WOW.Com Content Network
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 mydriatic pupil will remain excessively large even in a bright environment. The excitation of the radial fibres of the iris which increases the pupillary aperture is referred to as a mydriasis. More generally, mydriasis also refers to the natural dilation of pupils, for instance in low light conditions or under sympathetic stimulation.
Frank Sinatra may be called Ol’ Blue Eyes, but we know 16 dog breeds that can give him a run for his money. Dog breeds with blue eyes make our hearts sing with their piercing gazes and unique ...
Dogs are perhaps best known for being loving and loyal, but they also have a bevy of lesser-known and quite fascinating traits. Skip to main content. Sign in. Mail. 24/7 Help. For premium support ...
Large, open, alert eyes staring at an opponent mean your dog is readying herself for combat. Can you see lots of white around her pupils? Big-time aggression. 39. Stiffening.
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 ]
The dark blue, teal, and gold tapetum lucidum from the eye of a cow Retina of a mongrel dog with strong tapetal reflex. The tapetum lucidum (Latin for 'bright tapestry, coverlet'; / t ə ˈ p iː t əm ˈ l uː s ɪ d əm / tə-PEE-təm LOO-sih-dəm; pl.: tapeta lucida) [1] is a layer of tissue in the eye of many vertebrates and some other animals.