Behr syndrome

Behr syndrome is characterized by the association of early-onset optic atrophy with spinocerebellar degeneration resulting in ataxia, pyramidal signs, peripheral neuropathy and developmental delay.Although it is an autosomal recessive disorder, heterozygotes may still manifest much attenuated symptoms. Autosomal dominant inheritance also being reported in a family. [Source: Wikipedia ]

OrphaNet reference
Behr syndrome 
May Cause
Nystagmus
Optic atrophy