Senses

Vision of sharp edges and small shapes goes first in dogs with cataracts. Dogs do well until the last stages of opaqueness, according to GoPetsAmerica.com, as they adjust by using other senses.

Nuclear sclerosis

Nuclear sclerosis appears as a slight graying of the lens but doesn't significantly affect vision, reports PetEducation.com---it's caused by compression of linear fibers in the lens rather than cataracts.

Breeds

Breeds such as the bichon frise, Boston terrier, miniature poodle and miniature schnauzer have the highest cataract prevalence, according to PetEducation.com.

Prevention/Solution

Natural antioxidants such as wheat sprout powder significantly reduce cataracts in older dogs, according to GoPetsAmerica.com. For breeders, a Canine Eye Registration Foundation (CERF) examination detects hereditary problems and provides certificates for dogs without eye problems.

Damage

Untreated cataracts may cause glaucoma, uveitis, lens subluxation and retinal degeneration. The cataract's size and location determine the extent of vision impairment, reports gopetsamerica.com, as "even small cataracts may produce sufficient glare from scattered light."

Treatment

To treat cataracts, a veterinarian surgically removes and replaces the lens. According to PetEducation.com, no "good non-surgical treatment" exists.

Source:

Go Pets America: Cataracts in Dogs

Pet Education: Cataracts in Dogs

More Information:

Animal Eye Care: Cataracts, Blindness and Diabetic Dogs