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Keratoconus is a degenerative disorder of the eye witch is typically diagnosed in the person’s adolescent years. Keratoconus can cause substantial distortion of vision, with multiple images, streaking and sensitivity to light.

The affected eye with keratoconus is characterized by a distorted cornea witch thins and begins to bulge into a cone-shape. This cone shape deflects light as it enters the eye on its way to the light-sensitive retina, causing distorted vision. (See illustration below).

Often keratoconus is accompanied by astigmatism.


Nowadays refractive surgery enables to correct this condition. Three solutions are possible.

  • Cross-linking (CXL): : This procedure involves applying liquid riboflavin (vitamin B2) to the surface of the eye, followed by treatment with a controlled application of ultraviolet light. The cross-linking helps to stop the progression of the disease and strengthen the cornea.
  • Corneal ring : Two tiny, clear crescent-shaped pieces of a plastic polymer are inserted into the cornea to reshape the front surface of the eye and strengthen it.
  • Cornea transplant : A cornea transplant replaces diseased or scarred corneal tissue with healthy tissue from an organ donor.
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