The myth that dogs are colourblind has been circulating for many years. The truth is that dogs dont just see in simple black, grey and white. In fact they have no problem seeing a list of other colours from yellow to violet. What they do have difficulty seeing is hues of red, green and orange.

Dogs eyes have something called photoreceptors in their retinas. These are divided into two categories rods and cones. Dog's eyes have a high number of rods. Comparatively, human eyes have a high level of cones. They are also missing the fovea seen in human eyes, preventing their vision from being as clear.

Despite this and their inability to see objects in great details, dogs have excellent night vision and a superior ability to track movement.

So, how was it discovered that dogs see in limited colours? Around 100 years ago tests were carried out (purporting to be scientific) to determine just what sorts of colours dogs were able to see. However, the actual tests that were carried out did not help to determine the range of colours that dogs could see, but rather they showed that colour vision does not play a part in a dogs daily life.

It was another 90 years before further tests were carried out to determine whether dogs are colourblind or not. In 1989 the three researchers Neitz, Geist and Jacobs carried out a number of tests on domestic dogs and were able to determine the following. 1 Dogs have two kinds of colour receptors in their eyes and so are dichromatic. 2 In dog's colour receptors, one peaks for the blue to violet range and the other for the yellow to green range. In 1993 and 1995 further research was carried out that again supported these findings.

Dogs in fact suffer from a form of green colour blindness similar to human red-green colour blindness. This particular illness is more commonly referred to as deuteranopia.

The term colourblind can often be misleading. It does not automatically suggest an incapability to see colours. It is a specific condition that some humans are also known to suffer from and though dogs are not capable of seeing a similar level of colours as humans, they can see shades that fall between blue, violet and yellow.

Looking for a new puppy, the online marketplace adflyer has 100s of puppies for sale. Search 100s of breeds and even read the latest on them with the adflyer pets blog.

categories: pets,dogs,animals,advice,Home and garden,Home and Family,Top Tips

• Organic Shampoo for Dogs by Paine Robertson Organic shampoos are great for your pets as well as for you. Just like humans, your pet can develop skin irritation and allergies. The source can be caused by dust mites, dry skin, bugs, however, the majority of the time skin irritation is caused by chemicals in......
• Factors to Keep in Mind When Preparing Home Made Dog Food I don?t know about you, but I want only the best for my dog. This means taking the extra effort to ensure that he is healthy and well fed at all times. Home made dog food is a great way to accomplish this. While there may be some outstanding......
• Dog Obedience Training Secrets To Stop Dog Behavior Problems When we mean dog obedience training we cover the general terms of different training techniques like clicker training, dog whispering, marker training, positive reinforcement, collar and leash, reward training etc that are taught in the dog obedience training schools. You can register with these schools to find out more secrets......
• Do You Need A Luxury Pet Carrier? These days numerous pet owners like to display their pets. This has led to the popularity of luxury pet carriers that cover a vast range of pet transport needs. Regardless of whether you need an elegant carry bag for a cute little Papillion or a pocket book carrier for......

• Simply Hot Dogs and Black-Eyed Peas Simply Hot Dogs and Black-Eyed Peas   This is so simple and wonderful because it is gluten-free, it is affordable, and it can be ready in about 9 minutes. Ingredients: One 14 ounce can of Black-Eyed Peas * (Read label to be sure Black-Eyed Peas are G-F).  One can find several lists of......
• How To Purchase Webkinz Foг kids who wiѕh for а рet and playmatө, the Webkinz Dοg (Dog Webkinz) manufаctured Ьy Ganz makes a great рair. And for parөnts ωho ωant to make their kids wishes comө true and don't want the mess ups, а Webkinz mаy offer thө beѕt option. This stuffed animal toy......
• Your Pet Monthly #1: June 2009 [/caption] Welcome to the inaugural edition of your pet monthly. I plan to make this carnival a regular feature here at Dog Training Pet. It will cover more than just those lovable canines and man's best friend. You can also find articles on felines, horses, hamsters, birds, etc. I hope......
• FDA Is Going To Approve Genetically Engineered Animals For Our Food Chain. Genetically Engineered grains have been in existence for several years, amidst many concerns from various organizations and individuals. Now, the FDA is set to approve Genetically Engineered Animals to be introduced into the food chain. Ever since the beginning of Genetically Engineered grains, controversy has surrounded their safety. The Sierra......

	Better Homes and Gardens Household Hints and Tips List Price: $29.95 Sale Price: $8.63 Used From: $0.01
The editors of Better Homes and Gardens present a basic how-to reference manual for homeowners and renters. This all-in-one, indexed volume is organized to put facts at one's fingertips and to give the information needed to handle everyday problems and keep one's home running smoothly...

	Loving Pets Silver Bullet No-Tip Dish Dog Bowl, 64-Ounce List Price: $10.99 Sale Price: $6.23
Loving Pets Standard No-Tip Pet Bowl is an extremely durable bowl for your pet. These stainless steel bowls do not absorb food odors and are dishwasher safe. The non-skid rubber ring holds dishes in place while feeding...

Written by Martin Davis using tags: advice, animals, Dogs, home and family, Home and Garden, Pets, Top Tips