Over the past few years we have worked to breed genetically CEA Normal eyed collies. Every puppy and every dog that leaves our kennel is genetically testing and/or has an ophthalmologist exam to verify the dogs health.
Collie eye anomaly (CEA), or choroidal hypoplasia, is an inherited congenital disease, which affects an estimated 70% of Rough and Smooth collies in the United States to varying degrees. As CEA is not a progressive disease, whatever the pups status is at eight weeks is what they’ll be for the rest of their life. Sadly, not enough attention has been given to breeding out the disease. Instead, breeders have been content to pass on the mild inconveniences which may be: Colobomas (hole in the retina); Microphthalmia (small, recessed eyes); Anophthalmia (sunken eyeballs); or even Retina detachment (blindness).
There is no treatment for CEA and the disease is not reversible. If your puppy/dog is CEA Mutant, depending on the degree, there is maintenance to control the symptoms and the overall quality of life should not be affected.
Please check out these links for additional information:
Collie Health Foundation CEA: https://www.colliehealth.org/collie-health-101/cea-mutation/
Research Gate : https://www.researchgate.net/figure/Distribution-of-CEA-per-year-in-Rough-Collie-Shetland-Sheepdog_tbl2_40039987