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What is keratoconus? (No, not Kerry Katona!)
The central clear portion of the eye in front of the pupil is the cornea. In keratoconus, the cornea thins out and becomes cone-shaped. It is usually diagnosed in teenage years or slightly older.

Diagram of the eye
Diagram of the eye

How does keratoconus affect the vision?
Keratoconus results in reduced vision, often even after glasses are worn. The extent of the reduced vision depends on the severity of the keratoconus. The progression of keratoconus is variable and should be monitored regularly. 

What is the treatment for keratoconus?
Initially, glasses or soft contact lenses will clear the vision. Moderate keratoconus will require gas permeable or specialist contact lenses. In advancing keratoconus, a relatively new treatment called corneal collagen cross-linking (CXL) may be appropriate. In severe cases, a corneal transplant (or graft) may be considered, although this treatment can prove tricky. 

eyeexampurplelight2

Last words
It is imperative that people with keratoconus have their eyes assessed regularly, to check for progression of the condition. 

Useful link: for more information, visit the National Keratoconus Foundation.

Other topics of interest: Fuchs’ Corneal Dystrophy, Colour Vision, Top Ten Tips

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