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Canine Cataracts

Canine cataracts are rather common in dogs, especially in older dogs and dogs suffering from diabetes.

Like people, dogs suffer from cataracts too. A cataract is simply any opacity in the lens. A healthy lens consists of 66% water and 33% protein, and under normal conditions, this water/protein ratio is always kept in balance.

Cataracts occur when the biomechanical system in the lens is changed or damaged, resulting in the formation of large amounts of proteins in the lens. The extra proteins cause the lens to lose its transparency, making the pupil of the eye appear cloudy or milky white.

Canine Cataracts and Nuclear Sclerosis

Not all cloudy eyes are as a result of canine cataracts. They may be the result of a much more common condition known as nuclear sclerosis, which occurs when tissues in the eyes get harder and more rigid over time, making the eyes look slightly bluish gray. Nuclear sclerosis is a normal change that occurs in the lens of older dogs (over 6 or 7 years old) and it usually occurs in both eyes at the same time. Unlike cataracts, nuclear sclerosis does not have a serious effect on a dog's vision and no treatment is needed.


Types and Causes of Canine Cataracts

Congenital Cataracts

Some puppies are born with cataracts and this type of cataracts is called congenital cataracts. Usually congenital cataracts occur in both eyes and are either inherited or caused by infections or toxins while the puppies are still unborn.

Developmental Cataracts

When a dog develops cataracts early on in life (before 6 years old), we say he has developmental cataracts. Developmental cataracts may be inherited or caused by external factors. The most common causes are:

  • injuries and trauma to the eye;
  • diabetes mellitus;
  • infection;
  • toxicity (free radicals - the harmful oxygen molecules in the body - can gradually damage the eye tissues causing cataracts).

Senile Cataracts

Like us, dogs also develop cataracts when they become older (often after 6 or 7 years old).

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Conventional Treatment of Canine Cataracts

Canine Cataracts

The only treatment is to surgically remove the lens with cataracts and have a lens implantation (IOL). This treatment for cataracts in dogs is becoming more common and very often has a very high success rate, in which the dog can see close to normal. However, as in all surgical procedures, there are some risks and possible complications. The common risks include:

  • Tissue Scarring: Dogs tend to have more inflammation in their eyes after surgery than humans and therefore they may have more scarring, which can slightly decrease vision.
  • Glaucoma: Glaucoma occurs in 30% of all dogs who have cataract surgery, usually within the first 24 hours after surgery. In many cases this condition is temporary and can be resolved with timely treatment. If untreated, however, glaucoma is painful, and can cause complete vision loss.
  • Detachment of the Retina: Re-attachment has a low success rate and this complication usually results in complete vision loss.

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Natural Remedies for Canine Cataract

Although natural remedies such as herbs and vitamins cannot cure cataracts in dogs, proper use of such natural supplements can greatly help prevent or delay the onset of cataracts. Prevention is better than cure, so please visit our page on Natural Dog Cataract Remedies to see how you can use natural remedies to prevent dog cataracts.



Related Topics

Dog Cataract Remedies
Dog Eye Problems

References

R. Kidd, Dr. Kidd's Guide to Herbal Dog Care (Storey Publishing, 2000).
Pitcairn and Pitcairn, Dr. Pitcairn's Complete Guide to Natural Health for Dogs and Cats (Rodale, 2005).
M.L. Wulff-Tilford and G.L. Tilford, Herbs for Pets (Bowtie Press, 1999).

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