Posterior Segment Disorders:  Congenital

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                      General Information



A congenital posterior segment eye disorder is an abnormal

condition of the back of the eyeball that is present at birth.

It may be inherited or may be caused by non-inherited diseases,

poisons, poor nutrition, radiation, drugs or infection.



Examples of congenital posterior segment eye disorders include

Collie eye syndrome, Sheltie eye anomaly, multiple ocular

anomalies, vitreoretinal dysplasia, retinal dysplasia, optic

disc colobomas, optic nerve hypoplasia, and others.



                 Important Points in Treatment



1.  In general, there is no treatment for congenital posterior

    segment eye disorders.  Some pets become blind, while others

    retain enough vision to function as normal pets.



2.  Animals with congenital eye disorders should not be used for

    breeding.



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