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Ask the Veterinarian/Color Blindness in Pets.


Dear Dr Anand

Do Color Blindness and Achromatopsia eye diseases are present in Pets?.

If yes, What are the line of treatment available for these diseases in Pets?.


Dogs can see colors but are at the same time colorblind.Dogs have two different color receptors in their eyes and therefore are dichromats.One color receptor peaks at the blue-violet range, the other at the yellow-green range. Dogs are green-blind which is one form of red-green color blindness also called deuteranopia.

Hence dogs are partially color-blind, and so are cats. But contrary to what some people think, they do see some colors — not just shades of black and white.They are just like color-blind humans, seeing some colors but not all of them. For the bright daytime light, cells known as cones are needed. Humans have three kinds of cones, enabling them to see blue, red and green.Cats and dogs, on the other hand, have just two kinds of cone cells (blue and green sensitive), allowing them to see only partial color.

Achromatopsia in dogs has been studied.Segregation of the domestic dog population into separate breeds, driven by artificial selection for defined phenotypic and behavioral traits, has been marked by the emergence of inherited canine diseases that are often directly comparable to those observed in humans. In humans, a condition referred to as achromatopsia, total color blindness, day-blindness or rod monochromacy.Cones are light-sensitive structures in the vertebrate eye. They are found throughout retina and are concerned with discrimination of color and visual acuity. There are three types of cone cells each containing a different iodopsin and each giving maximum response when stimulated by the blue, green and red. A pigment defect in one or more of the types of cone cells can lead to color blindness.
Cone degeneration (CD) is an autosomal recessive canine disease that occurs naturally in the Alaskan Malamute , Miniature Poodle and German Shorthaired Pointer breeds, although this condition may exist in other breeds of dogs 3. Canine cone degeneration (CD) was first observed in an inbred strain of Alaskan Malamute dogs in 1960, and is inherited as an autosomal recessive trait.
There is no specific treatment for achromatopsia, although deep red tinted spectacles or contact lenses can reduce symptoms of light sensitivity.Gene therapy in dog models has been demonstrated for the  functional recovery of cones.

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Dr S Bindu Anand


Large and Small Animal Medicine and Surgery, Farm Management,Preventive medicine


A Senior Veterinary Surgeon with more than 25 years’ experience in the field of Veterinary Science and Animal Husbandry. Mixed animal Practice that will utilize my skills in medicine and surgery, public health, client relations, and developing relationships within the community, such as humane society

Veterinary Consultant with Department of Animal Resources,Ministry of Environment,State of Qatar (Present). Animal Husbandry Department, Government of Kerala, India. Oakland's Park, Gloucestershire, United Kingdom. Severnside Veterinary Center, Gloucestershire, United Kingdom. Saud Bahwan Group, Sultanate of Oman. Trivandrum Regional Co-operative Milk Producers Union,Kerala,India.

BVSc & AH (Bachelor of Veterinary Science and Animal Husbandry) 1990. College of Veterinary & Animal Sciences, Mannuthy, Thrissur, Kerala, India under Kerala Agricultural University. Certificates Of Accomplishments- Equine Nutrition- University of Edinburgh Principles of Public Health-University of California, Irvine. AIDS- Emory University, Atlanta, Georgia. General Environmental Health – EPHOC-Tulane University School of Public Health and Tropical Medicine and the University of Alabama at Birmingham School of Public Health. Food Protection-EPHOC-Tulane University School of Public Health and Tropical Medicine and the University of Alabama at Birmingham School of Public Health. Zoonoses:University of Minnesota-School of Public Health online. Food Safety:University of Minnesota-School of Public Health online. Occupational Safety and Health-EPHOC-Tulane University School of Public Health and Tropical Medicine and the University of Alabama at Birmingham School of Public Health. Rabies Educator Certified -Global Alliance for Rabies Control. Animal Handler & Vaccinator Educator Certified -Global Alliance for Rabies Control. Wildlife Conservation-United for Wildlife

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