Signs worth investigating
Vision loss or whitish appearance; early changes may be invisible.
Hereditary cataracts · HSF4
30 SECONDS · What it is
Lens clouding; HSF4 increases risk with variable expression.
3 MINUTES · What to look for and do
Can it be prevented?
Eye screening and professionally planned matings reduce uncertainty.
EXPERT · Testing and breeding decisions
How it is confirmed and what to request
HSF4 testing plus eye examination; a negative result does not exclude other cataracts.
Verifiable sources
From the guide to your Lunamar records
The library explains breed and health concepts. The private platform organises dogs and kennels, preserves evidence, explores pedigrees and records reproduction. Reading a guide does not create records, grant access or confirm a result.
In Health and genetics, preserve the dog’s report and review variant, copies, inheritance and page before marking it Documented. A genetic finding, clinical suspicion and diagnosis are different facts. Recording a result does not prescribe treatment or automatically approve a mating.
For an individual dog, discuss tests and family history with the veterinarian. The system does not diagnose or decide treatment, ovulation or insemination timing. Missing data must remain identified as pending information.
Open the private platform user guides
Application to Lunamar features reviewed on 22 October 2026. Each reading retains the scope of its clinical sources and review dates.