Defintion of Blindness
Blindness is the lack or loss of the ability to see. Anything that damages the cornea, retina or other eye structures can cause blindness, including cataracts, glaucoma, uveitis, trauma, ulcers, hemorrhage, lens luxation, retinal detachment, retinal degeneration, retinal atrophy, brain lesions, brain swelling, ivermectin or lead toxicity, inflammation, infection and cancer. Many cases of blindness are thought to be genetic and breed or age-specific. Blindness is more prevalent in white dogs, such as white Boxers and Great Danes. The clumsiness and inactivity of older dogs is often chalked up to age when it may be due to failing eyesight, which makes dogs reluctant to move around, even in familiar environments. Blindness can affect one or both eyes and can come on gradually or quickly; dogs that lose eyesight gradually tend to compensate better. Owners should familiarize themselves with the signs of blindness so that they can get their dogs veterinary attention if necessary.