Blue eyes are not confined to merles; there is a recessive gene in the breed that produces blue or split blue eyes in solid colored dogs as well. Some dogs are odd-eyed, having one eye that is blue and another eye brown. Plus: For more tips on avoiding eyeshine when taking pet photos, check out 5 Tips for Perfect Holiday Card Pet Snapshots. This clouding of the eye lens prevents light from passing through, ultimately causing a loss of vision. If you look carefully you can see a sliver of blue in the amber eye. Have a point of view to share? All rights reserved. Anterior Uveitis in Dogs. This is normal and causes no harm. Merle dilutes Amber eyes usually occur when the eumelanin produced by the dog is diluted or modified by the recessive genes in the B or D series. Tear stains appear in certain breeds more … If you are seeing different colors in the eyes of your dog, here are some possible causes: The tapetum lucidum may not be present in an eye that has a blue iris (pupil). Looking into the healthy dog’s eye, you’ll see a dark center (pupil) surrounded by a colored ring known as the iris, and outside the iris is the white sclera. They include dogs, cats, cattle, deer, horses and ferrets. Want to give your pup yummy, low-calorie treats? All rights reserved. Let us know! Double (homozygous) merles are highly likely to have blue eyes and a completely Although amber eyes most commonly occur on liver and blue dogs, they can also occur occasionally on dogs with black pigment. “This is an adaptive feature in animals who tend to be hunters at dawn and dusk,” Dr. Miller says. being a cryptic merle (i.e. the more grey/diluted areas), the more likely they are to have blue eyes or a butterfly nose. Dogs See Fewer Colors Than We Do While scientists used to believe that dogs were color blind, turns out your dog can see colors, but with a different spectrum. A dilution gene, its presence can lighten the color of the dog’s coat, often creating a dappling effect as well as vary the eye’s colored part (iris). Watery eyes, known as “epiphora,” is fairly common in dogs, and may be caused by either an excessive production of tears or failure of the tears to drain properly. Genetically, there are four ways a dog can have blue eyes. ranging in shade from almost white to sky blue. Powered by Brightspot. The tapetum lucidum may be more obvious in one eye if the pupil is abnormally dilated. Neither of Revy's parents had blue eyes, so Revy's blue eye may be due to a mutation, or could be connected to the amount of white on her head. Typical causes include inadequate tear production (dry eye), scratches on the surface of the eye (corneal ulceration), inflammation inside the eye (uveitis), … Powered by Brightspot. The Merle gene causes blue color in the iris, and butterly noses. In the dark, canine eyes react to exposure to light differently than human eyes because dogs (along with cats and many other animals) possess a light-reflecting surface known as the tapetum lucidum, located between the optic nerve and the retina. Most are oval and placed midway between the side and front of their faces. This only tends to occur on very high-white dogs with the extreme spotting pattern, such as Dalmatians. You’ve probably seen dark brown or reddish tear stains under a dog’s eyes and wondered where they come from. If eumelanin is absent in the eyes, the dog has blue eyes. As well, each dog breed (purebred) typically will have one or more predominant eye color (s). Less of it would result in a lighter eye color. Animal behavior, dog and cat breeds and more the canine eye structure have revealed some differences in design. Seen dark brown, so you may notice tone of that color emerging Card... 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