Friday, May 1, 2020
At least 2 billion people around the world have vision problems but how do you know if and when your pet is struggling with its own eyesight? Its a good question, especially in a year numbered 2020.
Dr. Wendy Townsend, associate professor of ophthalmology in Purdue Veterinary Medicines Department of Veterinary Clinical Sciences, has focused her career and research in veterinary medicine on diagnosing and treating eye conditions in animals. The most common question I get is if we fit animals with glasses, Dr. Townsend says. While thats not what we do, our goal is to help animals see better and improve their quality of life if theyre having issues.
Although her patients span a variety of species, her research is focused on a particular breed of dog that reigns as one of the most popular dog breeds in America: golden retrievers. Golden retriever pigmentary uveitis is a disease almost exclusively found in purebred golden retrievers. Its an inherited form of uveitis (inflammation of the uveal tract, which includes the iris). And though the disease is inherited, the onset and diagnosis usually occurs when the dogs are older.
The disease can often result in blindness due to cataracts and glaucoma, and there are no current methods to prevent or reverse it. Mild symptoms, such as redness and drainage, usually dont appear until the dog is around eight years old and can progress to an advanced stage before dogs see a veterinarian, Dr. Townsend says. The disease affects about 10% of senior golden retrievers.
Dr. Townsend is leading a study that is trying to identify the gene that causes the disease. If the gene can be identified, the disease can be detected earlier, and breeders will be able to identify which of their dogs might be carriers and how they can keep the disease from being passed on to future generations.
The problem breeders are facing right now is that even if theyre being responsible and making good decisions, they dont know their dog is affected, Dr. Townsend says. They can be several generations down their pedigree before they know theres a problem.
Dr. Townsend grew up owning golden retrievers and was completing her residency in veterinary ophthalmology when the disease was first recognized. It was bizarre because nobody could understand why it was happening in this specific breed, Dr. Townsend says. But since I loved golden retrievers and had a passion for ophthalmology, it seemed like a natural fit.
And although the disease presents itself primarily in purebred golden retrievers, Dr. Townsend explains that it can appear in some crossbreeds especially Labrador and golden retriever crosses. That becomes a concern because Labrador and golden crosses are frequently used as seeing-eye dogs, Dr. Townsend says. And because the disease doesnt show symptoms until these dogs are older, they could be struggling with their own vision and you might not even know.
Thats why Dr. Townsend says having dogs screened especially service dogs is critical. The earlier you can catch something, the better, Dr. Townsend says. That goes for all vision problems with any animal.
As a veterinary ophthalmologist, Dr. Townsend says its not uncommon for her to see dogs from across the country affected by golden retriever pigmentary uveitis. In addition to those patients, she commonly sees animals with corneal ulcers (scratches on the eye), cataracts, and glaucoma. Her patients include mostly dogs, horses, and cats but she also has treated penguins, tigers, and other exotic species.
And although she doesnt fit animals with glasses, she has fitted a dog or two with contact lenses. Theyre usually dogs that participate in agility and have trouble focusing or struggle with nearsightedness.
Sometimes animals struggle with the same eye problems that people do. Theyre just not as good at telling us when something is wrong, Dr. Townsend says. She consistently encourages pet owners to be cognizant of their pets eye health for that very reason.
Animals are good at compensating when something isnt working right. So if one eye is bothering them, theyll just rely more heavily on the other eye, Dr. Townsend says. And most of our pets dont need to have super-sharp vision to lead normal everyday lives. But in some cases like with dogs that participate in agility being able to focus both near and far is important.
As Dr. Townsend continues her mission to solve the mystery behind golden retriever pigmentary uveitis in addition to seeing her patients she hopes she can build some awareness around the field of ophthalmology. The eye might be small, but its a powerful organ that we all use and it allows me to work across a wide variety of species, Dr. Townsend explains. I frequently have clients tell me, I had no idea this was an option, or, I didnt know there were eye doctors for dogs. The impact this field can have on our patients and their quality of life can be significant.
Dr. Townsends work is supported by the American Kennel Clubs Canine Health Foundation.
Writer(s): Abbey Nickel, Purdue News Service, and Kevin Doerr | pvmnews@purdue.edu
Original post:
More Than Meets the Eye: Veterinary Ophthalmologist Wendy Townsend Focuses on Animal Eye Conditions - Purdue Veterinary News
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