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How many stages are there to cataracts and at what stage do people generally have surgery?
Annpoe
Cataracts, the clouding-over of the lens, usually affect both eyes and one more than the other. They are so common in elderly people that almost everybody over the age of sixty-five has some minor sign, usually at the edge of the lens, which doesn't greatly trouble the vision. Like aching backs and arthritic joints, cataracts are part of growing old. Fortunately, they are painless. Usually, this stage you need to see a specialist.
The other good news for victims is that in recent years eye surgeons have made enormous progress in treating cataracts. The operation, which takes one of several forms according to the condition of the lenses, lasts about an hour. The success rate is high - about 95 percent. One technique, using a freezing probe, removes the whole lens. In another, the opaque part is drawn out by suction. In a third, a high-speed vibrator breaks up the cataract so that it can be withdrawn through a hollow needle. Because the operation destroys part of the lens, a replacement is needed before the patient can see clearly again. Sometimes, the opthamologist prescribes thick glasses or contact lenses. In other cases, a permanent plastic lens is implanted in the eye.
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Can a dogs eyes have cataract sugery?
Cataracts are formed as the lens in the eye slowly hardens as a dog (or human) ages. As the lens hardens, it becomes less transparent and more milky white, impairing vision. At advanced stages, it can cause functional blindness, although the dog can usually differentiate between shadow and light. Cataracts are not life-threatening, just another function of getting older. A dog with cataracts can expect to live as long as a dog without cataracts. However, veterinary ophthalmologists can repair cataracts through surgery - the milky white lens is removed and an implant is put back to function as the lens. This can make your dog's later years much more interesting and enjoyable, as he can see again.
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