The true cause of keratoconus is unknown. It is possible that this disorder is caused by multiple factors, both hereditary (10%) and environmental.
Other possible causes are:

  • Constant rubbing of the eyes, especially in people who suffer from allergies
  • Physical disorders, e.g. Down’s and Turner syndromes, osteogenesis imperfecta, atopic eczema, connective tissue disease
  • Ophthalmic disorders
  • Refractive surgery