Neuropathy strictly speaking is any disease that affects the neurons of the nervous system. In practice it is recognized as a peripheral disorder, potentially affecting nerves anywhere except the brain or the spinal cord.
The four major forms of nerve damage are polyneuropathy, autonomic neuropathy, mononeuropathy, and mononeuritis multiplex. The most common form is peripheral polyneuropathy, which mainly affects the feet and legs.
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Leber's Congenital Amaurosis :: Retina

Leber Hereditary Optic Neuropathy - Provides details of aetiology, diagnosis, symptoms, and research. Includes recommendations for genetic testing and counselling. From GeneReviews.
Leber Optic Atrophy - The National Center for Biotechnology Information provides details of the genetic components, and a description of clinical features.
Leber's Optic Neuropathy - The Scottish Sensory Centre provides an outline of the condition, as well as explaining how affected individuals can be helped by family and friends.
Leber's Optic Neuropathy - Explains the hereditary nature of the disease, and provides FAQ and details of current research.