The U.S. registration organization, CERF, reported the incidence in the U.S. of choroidal hypoplasia, optic disc / nerve coloboma and retinal detachment among several affected breeds over the period of 1991 to 1999. (optigen.com)
It tests for the gene mutation that causes choroidal hypoplasia which is present in all CEA dogs. (ashgi.org)
All Aussies affected with CEA will exhibit choroidal hypoplasia in both eyes. (ashgi.org)