The cornea is the clear curved window at the front of the eye.  It can be seen if one views the eye from the side.  Many diseases affect this structure and AAEC provides assessment and treatment for these conditions.  Some commoner examples are mentioned below.


Keratoconus is a genetic disease that progresses in the first 3 or 4 decades of life.  It distorts and stretches the cornea, causing increasing short-sightedness and severe astigmatism.  Eventually it may distort the cornea to such a degree that it reduces vision to a point where glasses and contact lenses are no longer useful. Though in most people it continues throughout life, it sometimes slows or even stops with age.

What can we do about it?

Corneal collagen cross-linking.  The cornea is soaked in riboflavin (vitamin B2) using drops and exposed to ultraviolet light for half an hour.  The corneal tissue becomes more rigid and progression of the disease is stopped.

This is a treatment developed since approximately 2007 and has shown significantly better outcome than previously possible for eyes with disease that continues to progress.  It is likely to prevent the long-term need for routine corneal transplant in affected patients.  This was a common requirement in more extreme cases in the past.


Corneal scar

The cornea is naturally very clear and transparent.  It can be scarred by disease and injury.  Scars in the cornea interfere with vision in two ways.  They are cloudy and so cloud the vision.  They also make the surface of the eye rough.  The eye cannot see well through a rough surface.

What can we do about it?


Some excimer lasers, the same laser used in laser vision correction, can be adapted to remove scars.  Not all excimer lasers can do this.  With its very sensitive corneal mapping devices, the laser at AAEC is highly advanced in these techniques.

Smoothing of corneal irregularity

The highly developed mapping capability of the iVis excimer laser at AAEC allows this laser to smooth most forms of corneal irregularity.  This overcomes the roughening effect of corneal scars or to reshape irregular corneas that are not scarred