The lens of the eye normally lies immediately behind the iris and the pupil, and is suspended in place by a series of fibers, called zonular ligaments. It functions to focus light rays on the retina, in the back of the eye.
When partial or complete breakdown of the zonular ligaments occurs, the lens may become partially dislocated (Lens Subluxation) or fully dislocated (Lens Luxation) from the lens’ normal position. Movement of the lens forward through the pupil into the Anterior Chamber of the eye is termed Anterior Lens Luxation. Movement of the lens backwards into the Vitreous Chamber of the eye is termed Posterior Lens Luxation.
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Lens Luxation can occur for a several different reasons.
Primary Lens Luxation is a heritable disease in many breeds, and often affects both eyes, although not necessarily at the same time. Primary Lens Luxation is caused by an inherent weakness in the zonular ligaments which suspends the lens.
Lens Luxation can also occur secondary to other primary problems of the eye, including inflammation, cataracts, glaucoma, cancer, and trauma.
In all cases, a thorough eye exam by your veterinarian or a veterinary ophthalmologist is required, with careful evaluation for uveitis and glaucoma. If detected early, surgical removal of the lens can be beneficial. Medical treatment of inflammation and glaucoma in the form of topical and oral medications can relieve much of the discomfort associated with this disease.
Afghan Hound
Australian Cattle Dog
Beagle
Border Collie
Border Terrier
Brittany
Bull Terrier
Bulldog
Cairn Terrier
Chihuahua
Cocker Spaniel
Dachshund
Fox Terrier Smooth
Fox Terrier Wire
German Shepherd Dog
Greyhound
Irish Setter
Jack Russell Terrier
Manchester Terrier
Norwegian Elkhound
Norwich Terrier
Pekingese
Pembroke Welsh Corgi
Pomeranian
Poodle
Scottish Terrier
Sealyham Terrier
Shar-Pei
Siberian Husky
Skye Terrier
Tibetan Terrier
Welsh Terrier
Whippet
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