PLL has been found in Norwich terriers. The PLL DNA test identifies the simple recessive mutation causing PLL in Norwich terriers.
A PLL-affected dog (two copies of the PLL mutation) has an almost 100 percent chance of getting PLL. A PLL-carrier (one copy of the PLL mutation) has an estimated chance of 5 percent of getting PLL. PLL-carriers are recommended to have annual eye exams by a veterinary ophthalmologist. No Norwich PLL-carrier has been reported to get PLL.
As of Dec 2017, OFA reports that 187 Norwich terriers have been DNA tested for PLL, with 94 percent being normal, 5.5 percent carriers, and 0.5 percent affected.
An ADAMTS17 Splice Donor Site Mutation in Dogs with Primary Lens Luxation, Farias et al., IOVS, Sep 2010.
ADAMTS17 mutation associated with primary lens luxation is widespread among breeds, Gould et al., Veterinary Ophthalmology, 2011.
Last updated 20181209.