This is a rare kind of blindness or severely impaired vision caused by a defect transmitted as an autosomal recessive trait and occurring at birth or shortly thereafter.

This also is called amaurosis congenital of Leber's, congenital retinal blindness, hereditary epithelial aplasia, and retinal aplasia.

One kind of Leber's amaurosis results in complete blindness, but with a second kind the pathology does not progress and the patient has slight vision.

The eyes appear normal externally, but...