Often referred to as mild CRC, Grade I or Grade II, it is the least harmful and least severe form of CEA. This is the most common abnormality found in Collie eyes. Thus it is often difficult to judge the pigment in a Blue Merle's eyes as it is diluted along with his coat color.Ĭhoroidal Hypoplasia, Chorioretinal Change : These refer to abnormalities in the coloring or pigmentation of the choroid or central layer of the eye's lining. These correspond somewhat to a dog's coat color. There are variations even in " Normal" eyes. Keep in mind that these are still in fact affected with CEA). (There are also "Go Normals", which are so mildly affected at a young age, that later, the pale areas disappear, leading to what is termed a "Go Normal".
Normal : A “Normal” eye rating is of course the best grading there is. However, currently there is no universal, standardized grading system. It used to be popular to use a Grading System and still is being used in certain parts of the country. If given "affected" the type of abnormality is noted. The eyes must be dilated prior to the examination, so the interior of the eye can be examined with an Ophthalmoloscope.Ī dog is either given a “Normal” or "Affected" rating. It is something that your average Veterinarian is not qualified to diagnose. Collie Eye Anomaly (CEA) can be easily checked when the puppies are 5-7 weeks old, by a qualified Board Certified Ophthalmologist. This so-called syndrome (meaning a group of conditions which appear in conjunction with each other) is present prior to birth. It was later found to exist in most Collies and in most Collie families. Researchers first noted this problem over fifty years ago. This is the most common of the Collie eye diseases, but it should be noted that Collies share this disease with several other breeds.
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