An inherited condition found in Rough and Smooth Collies but also in Shetland Sheepdogs and Border Collies, there are instances of this condition being now found in the Lancashire Heeler. Both eyes are affected but not always to the same extent.
It is inherited as a simple recessive gene and is non-progressive.
They include chorioretinal dysplasia ( areas of the retina without the necessary colouration),
colobomata (bulges in the lining of the back of they eye), retinal detachment (retina breaks away inside they eye), bleeding within the eye and corneal edema (clouding on the surface of the eye).
Because of the type of
inheritance of this condition some dogs will carry the genes for Collie Eye
Anomoly without showing any clinical signs.