In fact,
most dogs with cataracts do not need surgery, because most lens opacities in dogs (and a lens opacity is a cataract, no matter how tiny or big) are small and don't significantly interfere with vision.
Not exact matches
The mode of inheritance for
most Aussie
cataracts is dominant
with incomplete penetrance, meaning not every
dog with the mutation will develop
cataracts though 70 % of those
with cataracts have it.
However, it is also true (in Dr. McCalla's view) that restoring a blind
dog's vision
with cataract surgery is one of the
most satisfying parts of being a veterinary ophthalmologist, and surgery can give a
dog a wonderful new lease on life.
Most cataracts develop
with age, but shouldn't be confused
with nuclear sclerosis, a normal change of the lens in pets over 7 years of age, which causes the lens to appear somewhat whiter or grayer but does not seem to impair the
dog's vision.
Congenital
cataracts mean the
dog was born
with them and although it is
most often due to a hereditary condition, they can develop while still in the uterus due to toxins or infection.
For aortic stenosis, GDV, early onset
cataracts, dilated cardiomyopathy, elbow dysplasia, epilepsy, and portosystemic shunt,
most purebred groups were not statistically distinct from the mixed - breed population
with higher prevalence in purebreds restricted to distinct subsets of purebred
dogs.