Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the treatments for Keratoconus ?
    ### Response:
    What causes keratoconus? The exact cause of keratoconus is unknown. Both genetic and environmental factors may play a role in the development of keratoconus. The genetic factors involve abnormalities in the structure of collagen, which result in a weak and flexible cornea.
    