Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) hypomyelination and congenital cataract ?
    ### Response:
    Hypomyelination and congenital cataract is an inherited condition that affects the nervous system and the eyes. This disease is one of a group of genetic disorders called leukoencephalopathies. Leukoencephalopathies involve abnormalities of the brain's white matter.
    