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  • Book an Eye Exam
  • glasses
  • Contact Lenses
    • Switch to us and save
    • Daily contact lenses
    • 2 weekly contact lenses
    • Monthly contact lenses
    • Order your contact lenses
    • Types of Contact Lenses
  • Eye Health
    • Book an Eye Exam
    • Explaining your eye exam
    • Help and advice
  • Contact us
    • About us
    • Book an Eye Exam
    • Finding us
    • Your Data
Keratoconus

Keratoconus literally means 'conical or cone-shaped cornea'. The cornea is the major focussing surface of the eye, and in keratoconus, the cornea becomes stretched and thin near its centre. The thinned part of the cornea bulges, making the vision more shortsighted and irregular, and as a result, the vision is distorted.

The stretching of the cornea tends to progress but the rate varies. Sometimes one eye may be badly affected while the other eye may show very little sign of the condition.

The cause of keratoconus is unknown. It may be associated with allergy or could have a genetic component. Keratoconus rarely appears in an individual until puberty or beyond.  Although no one can be sure how far keratoconus will develop in an individual, the condition does not cause blindness. With the current treatment available, most people should be able to lead a normal life despite this condition. However, good vision may be difficult to maintain at times and contact lens tolerance varies.

Treatment and further information about keratoconus

The first line of treatment for keratoconus is usually with rigid contact lenses, although some people with early keratoconus may be able to wear spectacles or soft contact lenses. There is a small risk of infection when wearing contact lenses and the risk becomes much greater if the lenses are not kept clean, so it is important to strictly follow the hygiene instructions given when the lenses are fitted.

Contact lenses do not, unfortunately, slow down the rate of progression of the cone, but they do give good vision during that period which could not otherwise be achieved. There is no medication available to treat the eye, but the condition does eventually stabilise, although it can take many years before that happens.

In about 10%-20% of keratoconus patients the cornea may become extremely steep, thin and irregular or the vision cannot be improved sufficiently with contact lenses. The cornea may then need to be replaced surgically with a corneal transplant or graft.  Visual recovery after a transplant takes a long time – sometimes as long as 18 months – to settle down and there is a strong possibility that the eye will still need to be fitted with a contact lens afterwards in order to see properly. Surgery is therefore not a shortcut to perfect vision nor a way of avoiding contact lens wear. There is also a risk of the transplant rejecting afterwards, although over 90% of corneal transplants that are done for keratoconus are successful. 

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Monday to Saturday 10am - 6pm
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The Eye Centre, 56 High Street,  Leicester,  LE1 5YN 
​01162532788
enquiries@theeyecentre.co.uk​

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