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What are the symptoms of keratoconus?

Keratoconus usually affects both eyes, though symptoms in each eye may differ. Symptoms usually start to occur in people who are in their late teens and early 20s and may include:

  • Mild blurring of vision
  • Slight distortion of vision
  • Increased sensitivity to light
  • Glare
  • Mild eye irritation

The rate of progression varies. Keratoconus will often progress slowly for 10 to 20 years and then suddenly stop.

As the condition progresses, the most common symptoms include:

  • Increased blurring and distortion of your vision
  • Increased nearsightedness or astigmatism
  • Frequent eyeglass prescription changes
  • Inability to wear contact lenses

Occasionally, keratoconus can advance rapidly, causing the cornea to become scarred. Scar tissue on the cornea causes the cornea to lose its smoothness and clarity. As a result, even more distortion and blurring of vision can occur.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.