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Unique equine cataract surgery offered on routine basis
February 15, 2006The University of Liverpool is offering a new form of equine cataract removal surgery on a routine basis, which could save the sight of thousands of horses.
Professor Derek Knottenbelt from the University's Division of Equine Studies and Professor David Wong from the Ophthalmology Research Unit, have developed a unique approach to cataract removal operations combining techniques used on humans and animals. The new surgery is proving consistently successful in restoring complete sight to patients without post-operative symptoms.
Based at the University's Large Animal Hospital at Leahurst, Professor Knottenbelt and his team are now offering the surgery on a routine basis to horses suffering from cataracts. The team spent several months testing out various surgical techniques used both on humans and animals to establish the best combination of methods to remove horse cataracts.
Georgie is a 15-month-old filly, with cataracts in both eyes. The team is currently preparing to operate on Georgie's second eye - the first operation was completed without problems. Completely blind from birth, she will undergo further surgery at the University's Large Animal Hospital. Georgie is owned by the International League for the Protection of Horses (ILPH).
Cataracts develop because of hereditary, congenital and ageing factors and as a consequence of injury or ophthalmic disease. The latter causes are largely unsuitable for the treatment because previously attempted procedures carried a high complication rate.
To achieve the best results, the surgeons borrowed several techniques regularly used in human cataract removal. The team adapted a human phacoemulsification machine for equine use, which breaks up a cataract through ultrasound. They combined this with a technique commonly used in remote Indian Eye Camps to dislodge the cataract via the anterior eye chamber using a jet of saline. The teams remove the lens using an ultrasound probe and administered an injection of intravitreal steroids to control postoperative inflammation of the eye.
Professor Knottenbelt said: "This new surgery shows how effectively the latest human cataract surgical techniques can translate successfully to bear on an equine problem. We are pleased that the University can now offer such progressive treatment to tackle equine cataracts on a larger scale than currently available."
The surgery has successfully been carried out on several horses at the University, including TC, a nine-year old Gelding warmblood, who had developed cataracts in both eyes. TC's owner, Melina Jones, noticed a problem when TC began walking into objects and developed facial injuries. After consulting her vet, TC was referred to Leahurst where Professor Knottenbelt and Dr Wong carried out two operations to remove the cataracts.
Melina said: "I'm absolutely delighted with the outcome of TC's surgery. Surgery is quite rarely performed in the UK on horses with cataracts as it carries risks but if I had not agreed to this pioneering operation the only other course of action would have been to have my horse put down.
"As a showjumping horse, it was vital to have TC's eyesight restored. Without experts such as Professor Knottenbelt, who are willing to push the boundaries of veterinary surgery and try these new techniques, my horse would not be here today.\\\
University of Liverpool
Georgie is a 15-month-old filly, with cataracts in both eyes. The team is currently preparing to operate on Georgie's second eye - the first operation was completed without problems. Completely blind from birth, she will undergo further surgery at the University's Large Animal Hospital. Georgie is owned by the International League for the Protection of Horses (ILPH).
Cataracts develop because of hereditary, congenital and ageing factors and as a consequence of injury or ophthalmic disease. The latter causes are largely unsuitable for the treatment because previously attempted procedures carried a high complication rate.
To achieve the best results, the surgeons borrowed several techniques regularly used in human cataract removal. The team adapted a human phacoemulsification machine for equine use, which breaks up a cataract through ultrasound. They combined this with a technique commonly used in remote Indian Eye Camps to dislodge the cataract via the anterior eye chamber using a jet of saline. The teams remove the lens using an ultrasound probe and administered an injection of intravitreal steroids to control postoperative inflammation of the eye.
Professor Knottenbelt said: "This new surgery shows how effectively the latest human cataract surgical techniques can translate successfully to bear on an equine problem. We are pleased that the University can now offer such progressive treatment to tackle equine cataracts on a larger scale than currently available."
The surgery has successfully been carried out on several horses at the University, including TC, a nine-year old Gelding warmblood, who had developed cataracts in both eyes. TC's owner, Melina Jones, noticed a problem when TC began walking into objects and developed facial injuries. After consulting her vet, TC was referred to Leahurst where Professor Knottenbelt and Dr Wong carried out two operations to remove the cataracts.
Melina said: "I'm absolutely delighted with the outcome of TC's surgery. Surgery is quite rarely performed in the UK on horses with cataracts as it carries risks but if I had not agreed to this pioneering operation the only other course of action would have been to have my horse put down.
"As a showjumping horse, it was vital to have TC's eyesight restored. Without experts such as Professor Knottenbelt, who are willing to push the boundaries of veterinary surgery and try these new techniques, my horse would not be here today.\\\
University of Liverpool
Cataract Surgery Current Events and Cataract Surgery News RSSCataract surgery does not appear associated with worsening of age-related macular degeneration
Age-related macular degeneration does not appear to progress at a higher rate among individuals who have had surgery to treat cataract, contrary to previous reports that treating one cause of vision loss worsens the other.
Cataract surgery helps AMD patients; steroid improves DME; online eye health forum
This month's Ophthalmology, the journal of the American Academy of Ophthalmology (Academy) reports on a national study that finds cataract surgery is likely to benefit patients with age-related macular degeneration (AMD) at all stages of the disease, on a clinical trial showing that the steroid triamcinolone may be effective in advanced diabetic macular edema (DME) patients when standard treatment fails, and on the public's use of two Academy-sponsored online eye health forums.
Drug for urination difficulties linked with complications after cataract surgery
Use of the medication tamsulosin to treat male urination difficulties within two weeks of cataract surgery is associated with an increased risk of serious postoperative ophthalmic adverse events such as retinal detachment or lost lens.
Corneal transplant technique shows promise in children
For infants and children with blinding diseases of the cornea, a sophisticated new corneal transplantation technique offers the hope of improving vision while overcoming the technical difficulty and low success rate of traditional penetrating keratoplasty (PK) in children, according to reports in the current issue of the Journal of AAPOS (American Association for Pediatric Ophthalmology and Strabismus).
Self-moisturizing contact lenses, naturally
Even contact lenses are joining the trend to go green.
Physics provides new insights on cataract formation
Using the tools and techniques of soft condensed matter physics, a research team in Switzerland has demonstrated that a finely tuned balance of attractions between proteins keeps the lens of the eye transparent, and that even a small change in this balance can cause proteins to aggregate and de-mix.
Eye diseases gave great painters different vision of their work, Stanford ophthalmologist says
Michael Marmor, MD, wanted to know what it was like to see through the eyes of an artist. Literally.
Cataract scheme 'expensive over-reaction' say doctors
The independent sector treatment centre (ISTC) scheme for NHS cataract services was an expensive over-reaction to the need to increase rates of cataract surgery, say senior doctors in this week's BMJ.
Artificial cornea offers better results for infants, some blind patients
Infants and adults who are blind due to a cloudy or damaged cornea are seeing some remarkable results thanks to a new version of an artificial implant that takes the place of the cornea, the clear covering of the eye that serves as our window on the world.
New wireless networking system brings eye care to thousands in India
Thousands of residents of rural villages in India are receiving quality eye care thanks to a collaborative effort between an Indian hospital network and the researchers at the University of California, Berkeley, and at Intel Corporation who have developed a new technology for low-cost rural connectivity.
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