What are the different types of corneal transplant surgery?
The corneal transplant surgery, also called keratoplasty, is a surgery that replaces a sick or damaged cornea of tissues from the eye of the human corpse. This is one of the most common types of transplant operations and has the highest success rate. There are different types of corneal transplant operations, including penetrating keratoplasty, descetere streaming of endothelial keratoplasty, lamellar keratoplasty and epikethophacia.
The cornea is a clean tissue layer in the eye. Corneal transplant surgery is performed when injured is lost due to corneal damage, illness or injury. Some conditions, such as keratoconus, cause the corneal curvature to change. Edema or corneal is another common problem remedied by corneal transplant surgery. The surgeon uses a tool called Trefin, a similar cookie cutter to remove a small disk of the patient's corn. The surgeon will then replace it with the corresponding disc of the donated tissue.
transplanted tissue is held on mywall of small stitches that must remain in place for at least six months. During this period of healing, the vision is very bad and the stitches cause some patients. The sewn are removed during several visits to the office. Some patients found that their vision would never return to normal due to irregular astigmatism, which is the deformation of graft of corneal tissue.
Most patients receiving transplanted cornea tissue are subject to PK surgery. However, there are newer techniques that can be effective for some patients. The main difference with newer techniques is that only the inner or outer layers of the cornea are replaced, rather than all layers, as in PK surgery.
Descemet's stripping endothelial keratoplasty (DSEK) is another type of corneal of plant transoperation. The surgeon uses specialized tools to enter the eye with a small cut in the cornea. The back of the cornetsY, which is called the Descetete membrane, is deprived and replaced by a piece of healthy tissue graft.
DSEK does not require stitches and therefore results in much fewer problems with astigmatism afterwards. There are fewer subsequent tests after surgery and patients generally acquire vision much faster. Some believe DSEK transplantation results in less transplant rejection than conventional transplants.
Lamellar keratoplasty (LK) is a type of corneal transplant surgery, which includes the removal and replacement of only patients or scarred outer layers of corneal tissue and replace a new "valve" donor tissue. This procedure is more demanding than surgery PK, but the risk of tissue rejection and infection is less. If stitches are required, they can usually be removed within a few weeks and visuals can be very fast. LK surgery is only suitable for conditions including the farthest layers of cornea.
Epikeratofakia is a rarely used type of transpla surgeryNtace of the cornea, which includes sewing corneal tissues directly to the surface of the existing cornea. Only an extremely thin cell layer on the outside of the patient's cornea is removed. The procedure may be perverted and there is no permanent corneal damage to the patient. This surgery is not widely used because the use of contact lenses can generally achieve the same results.