Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Keratoconus posticus circumscriptus ?
    ### Response:
    What are the signs and symptoms of Keratoconus posticus circumscriptus? The Human Phenotype Ontology provides the following list of signs and symptoms for Keratoconus posticus circumscriptus. If the information is available, the table below includes how often the symptom is seen in people with this condition.
    