What causes cataracts in dogs?
The majority of cataracts in dogs are the result of a genetic, or inherited, defect involving the lens. Many types of purebred dogs are predisposed to inherited cataracts, which may be present at birth or develop later in young to middle-aged animals. Dogs affected with inherited cataracts should not be used for breeding purposes. Cataracts are also associated with diabetes, advanced age, trauma, and retinal disorders. Depending on the cause, cataracts may or may not progress to total blindness. The rate of progression is often predictable and can be determined by a thorough examination by a veterinary ophthalmologist.
