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Symptoms

By Mayo Clinic staff

Signs and symptoms of keratoconus may change as the disease progresses. They include:

  • Blurred or distorted vision
  • Increased sensitivity to bright light and glare
  • Problems with night vision
  • Many changes in eyeglass prescriptions
  • Sudden worsening or clouding of vision, caused by a condition in which the back of your cornea ruptures and fills with fluid (hydrops)

When to see a doctor
See your eye doctor (ophthalmologist or optometrist) if you have irregular curvature of the eye (astigmatism) and your eyesight is worsening rapidly. Your eye doctor also may look for signs of keratoconus during routine eye exams.

If you're considering laser-assisted in-situ keratomileusis (LASIK) eye surgery, make sure your doctor checks for signs of keratoconus before you proceed.

Causes Definition
References
  1. Keratoconus. American Optometric Association. http://www.aoa.org/keratoconus.xml. Accessed Nov. 15, 2012.
  2. What is the cornea? National Eye Institute. http://www.nei.nih.gov/health/cornealdisease/. Accessed Nov. 15, 2012.
  3. Keratoconus. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckmanuals.com/professional/eye_disorders/corneal_disorders/keratoconus.html?qt=keratoconus&alt=sh. Accessed Nov. 15, 2012.
  4. Yanoff M, ed., et al. Ophthalmology. 3rd ed. Edinburgh, U.K.: Mosby Elsevier; 2009. http://www.mdconsult.com/das/book/body/212799885-2/0/1869/0.html. Accessed Nov. 15, 2012.
  5. Riordan-Eva P, et al. Vaughan & Asbury's General Ophthalmology. 18th ed. New York, N.Y.: The McGraw-Hill Companies; 2011. http://www.accessmedicine.com/resourceTOC.aspx?resourceID=720. Accessed Nov. 15, 2012.
  6. Keratoconus symptoms. American Academy of Ophthalmology. http://www.geteyesmart.org/eyesmart/diseases/keratoconus-symptoms.cfm. Accessed Nov. 21, 2012.
  7. Bower KS. Laser refractive surgery. http://www.uptodate.com/index. Accessed Nov. 21, 2012.
  8. Romero-Jimenez M, et al. Keratoconus: A review. Contact Lens & Anterior Eye. 2010;33:157.
  9. Keratoconus treatment. American Academy of Ophthalmology. http://www.geteyesmart.org/eyesmart/diseases/keratoconus-treatment.cfm. Accessed Nov. 21, 2012.
  10. What causes keratoconus? American Academy of Ophthalmology. http://www.geteyesmart.org/eyesmart/diseases/keratoconus-cause.cfm. Accessed Nov. 26, 2012.
  11. Kymes SM, et al. Changes in the quality-of-life of people with keratoconus. American Journal of Ophthalmology. 2008;145:611.
  12. Keratoconus diagnosis. American Academy of Ophthalmology. www.geteyesmart.org/eyesmart/diseases/keratoconus-diagnosis.cfm. Accessed Nov. 21, 2012.
  13. Comprehensive eye and vision examination. American Optometric Association. http://www.aoa.org/x4725.xml. Accessed Nov. 15, 2012.
  14. Li Y, et al. Corneal epithelial thickness mapping by Fourier-domain optical coherence tomography in normal and keratoconic eyes. Ophthalmology. 2011;30:1510.
  15. Barnett M, et al. Contact lenses in the management of keratoconus. Cornea. 2011;30:1510.
  16. Schornack MM, et al. Scleral lenses in the management of keratoconus. Eye & Contact Lens. 2010;36:39.
  17. Jhanji V, et al. Management of keratoconus: Current scenario. The British Journal of Ophthalmology. 2011;95:1044.
  18. Evaluation of the ophthalmologic patient. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckmanuals.com/professional/eye_disorders/approach_to_the_ophthalmologic_patient/evaluation_of_the_ophthalmologic_patient.html?qt=slit%20lamp&alt=sh#v1152031. Accessed Nov. 28, 2012.
  19. Sugar J, et al. What causes keratonconus? Cornea. 2012;31:716.
  20. Robertson DM (expert opinion). Mayo Clinic, Rochester, Minn. Dec. 21, 2012.
  21. Keratoconus. American Optometric Association. http://www.aoa.org/keratoconus.xml. Accessed Nov. 15, 2012.
  22. What is the cornea? National Eye Institute. http://www.nei.nih.gov/health/cornealdisease/. Accessed Nov. 15, 2012.
  23. Keratoconus. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckmanuals.com/professional/eye_disorders/corneal_disorders/keratoconus.html?qt=keratoconus&alt=sh. Accessed Nov. 15, 2012.
  24. Comprehensive eye and vision examination. American Optometric Association. http://www.aoa.org/eye-exams.xml. Accessed Nov. 15, 2012.
  25. Yanoff M, ed., et al. Ophthalmology. 3rd ed. Edinburgh, U.K.: Mosby Elsevier; 2009. http://www.mdconsult.com/das/book/body/212799885-2/0/1869/0.html. Accessed Nov. 15, 2012.
  26. Keratoconus diagnosis. American Academy of Ophthalmology. http://www.geteyesmart.org/eyesmart/diseases/keratoconus-diagnosis.cfm. Accessed Nov. 21, 2012.
  27. Romero-Jimenez M, et al. Keratoconus: A review. Contact Lens & Anterior Eye. 2010;33:157.
  28. Barnett M, et al. Contact lenses in the management of keratoconus. Cornea. 2011;30:1510.
DS01116 Feb. 20, 2013

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