Corneal transplantation has been the mainstay of treatment for decades. More recently it is reserved as a last resort because more less invasive methods to rehabilitate the vision are available. The visual outcomes and long-term success remain unchanged and it continues to be a great method to rehabilitate more advanced eyes, or those with scars preventing alternative methods. The two most common types of corneal graft used in keratoconus are;
Deep anterior lamellar keratoplasty (DALK) - here only the front layers of the cornea are replaced preserving your own internal endothelial cells. This has structural benefits and reduces the risk of transplant rejection.
Penetrating keratoplasty (PK) - this replaces all five layers of the cornea. This was the orignial method of performing corneal transplants. It remains a good option for people with full thickness scars or those who may have suffered corneal hydrops.