In addition, keratoconus is associated with:

  • An eye injury, i.e., excessive eye rubbing or wearing hard contact lenses for many years.
  • Certain eye diseases, such as retinitis pigmentosa, retinopathy of prematurity and vernal keratoconjunctivitis.
  • Systemic diseases, such as Leber's congenital amaurosis, Ehlers-Danlos syndrome, Down syndrome and osteogenesis imperfecta.

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