What It Is
Australian Shepherd hereditary cataracts are breed-associated inherited cataracts linked to an HSF4 risk variant, often described as bilateral posterior cataracts with variable age of onset and progression.
Also Called: Australian Shepherd hereditary cataracts; Aussie hereditary cataracts; HSF4-associated cataracts
Abbreviation: HC
Breeds Affected: Australian Shepherd
Breed Risk Note: This page is for the Australian Shepherd HSF4-associated cataract risk. It should not be used as a generic cataract bucket for unrelated breeds.
The Idiot-Proof Explanation
This is the Aussie cataract problem with a known genetic risk marker. It does not mean every carrier goes blind on schedule, because apparently even inherited eye disease likes plot twists, but it does mean breeders need to take it seriously.
What Causes It
A variant in HSF4 is associated with increased risk of hereditary cataracts in Australian Shepherds. Reported cataracts are often bilateral and posterior, with variable progression.
What Owners Actually Need To Know
Owners should ask about eye exams and genetic testing in breeding lines. A dog can look normal while early lens changes are already setting up shop. For breeding decisions, pretending you did not know is not a health plan.