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Kansas State Vets Perform Cataract Surgery on Young Gibbon

It might be the first surgery in the world on a gibbon that young.


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Booger, a 2-year-old gibbon.

Kansas State University College of Veterinary Medicine

Veterinarians at the Kansas State University’s College of Veterinary Medicine have performed what might be the first cataract surgery on a young ape patient in the U.S. The lucky ape? Booger, a 2-year-old gibbon.

"Booger is unique in that in my research and my understanding she is the youngest gibbon I know about to have cataract surgery," said Jessica Meekins, assistant professor of ophthalmology in the College of Veterinary Medicine. "The only other report I found was a gibbon of about 5 years old, and that was outside the country."

Booger lives at the Monkey Island Rescue and Sanctuary in Greenwood, Mo. Her owner, Dana Savorelli, said that she didn’t immediately notice that Booger had vision problems. "You would have to watch her a little bit in her own area to know she was blind because she's got it down so smooth on how everything operates," Savorelli said. "She did a lot more smelling and a lot more touching than what the other ones would do because her eyes weren't giving her what she needs."

Savorelli brought Booger to the Veterinary Health Center at Kansas State University, where she was first examined by James Carpenter, professor of wildlife and zoological medicine.

"When Dana contacted us, the first thing we did was discuss the case with the ophthalmologists because they are the specialists," Carpenter said. "And when we presented the case to them, Dr. Meekins was very excited. She informed us of what would be required to do a cataract surgery on a gibbon."

Carpenter said there were numerous people involved in performing the procedure.

"It was a real team effort," Carpenter said. "We had two ophthalmologists, two anesthesiologists, two specialists from our exotics pets/zoological medicine service, and a cast of many, many students, so it was a great teaching opportunity as well."

Meekins said there are several similarities in the eye structures of most animals, including in the development of cataracts.

"We call it comparative ophthalmology because despite a lot of variation in the species we may see, the eyes are remarkably similar," Meekins said. "A lot of the structures are very similar or identical, and so the basic methodology of the surgery was exactly what I would do in one of the animals that I'm more accustomed to doing surgery on, like in a dog."

Precision was an important part of the procedure.

"The incision is actually very tiny — it's only about 3 or 4 millimeters in length — and it's basically just long enough to facilitate the insertion of the instrument that we use to actually break up the cataract," Meekins said. "We were able to remove the lenses completely — the cataracts. Her capsules — the clear tissue that surrounds the lens — were pretty clear, so I am hopeful she's going to have a good vision outcome even though there were some factors that prevented us from putting artificial lenses in her eyes. Still, her vision should be better than it was with the cataracts blocking her sight. She should have basically the equivalent of farsightedness."

The cataract procedure is not expected to keep Booger down for very long.

"We would expect the incisions into her lenses to be essentially healed within about two weeks," Meekins said. "Most of the time we like to have the patient be fairly quiet and exercise-restricted for about a month after surgery."

Savorelli says Booger is doing great back at home. "She has the run of the front-room kitchen and dining room and is never caged. It is so cool to see her look and touch things with accuracy. We here at Monkey Island have been blessed to get to work with the professionalism of all who were involved at the Veterinary Health Center."

Check out a video from the surgery here:

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