Keratoconus is an eye disease that involves a distortion of the cornea. This distortion can lead to a distorted vision.
The eye disease typically appears during adolescence and reaches its most advanced stage in the thirties. The cause of keratoconus is still unknown and its progression is unpredictable.
- Contact lenses
In advanced cases of keratoconus, contact lenses (rigid form) are an efficient treatment to enable the patients to recover most of their daily activities.
The cross-linking technique is a new treatment that has proven its effectiveness in slowing or even stopping the progression of keratoconus, especially when the technique is combined with the use of intrastromal corneal segments (intra-corneal rings). Cross-linking is based on corneal collagen crosslinking with riboflavin, creating additional links between the collagen fibres and increasing its mechanical strength.
Corrective lenses may still be needed after treatment, but we hope that this new revolutionary treatment will limit the loss of sight and reduce the use of corneal transplants.
- Potential scars in the cornea.
- Average thickness of peripheral cornea < 300 microns
- Intrastromal corneal ring segments
Intrastromal corneal ring segments are small semi-rigid rings in PMMA (polymethylmethacrylate, or a type of plastic). By positioning them in the thickness of the cornea, the cornea is reshaped, thus correcting astigmatism. Their place in the therapeutic management is between the lens failing to adapt and the use of corneal transplant.
- Potential scars in the cornea
- Average thickness of the peripheral cornea < 450 microns.
- Steep cornea (> 55 dioptres)
A fast-evolving keratoconus with corneal scars can lead to a surgery and eventually keratoplasty