Corneal Transplants: Restoring Your Vision

PK is a full-thickness transplant that replaces all layers of the cornea with a donor graft. It is typically used for deep scarring, advanced keratoconus, or diseases affecting the entire cornea. Recovery can take up to a year, and it has a higher risk of rejection compared to partial procedures, but it remains an excellent option when deep layers are severely damaged.

DALK removes and replaces the front layers, including the epithelium and stroma, while preserving your own healthy inner layer (endothelium). This procedure is ideal for conditions like keratoconus and superficial scarring. Because your own endothelium stays in place, you get a lower rejection risk and shorter healing time than with PK, often allowing functional vision within six to eight months.

DSAEK replaces the inner endothelial layer along with a thin slice of stroma to treat endothelial disorders like Fuchs' dystrophy and corneal swelling. While visual recovery is good and generally occurs within three to six months, the graft is slightly thicker than in a DMEK procedure, which may affect the precision of final vision in some cases.

DMEK is the most precise technique, transferring only the thinnest possible layer of donor tissue containing endothelial cells. This minimally invasive approach offers the fastest visual recovery, often within weeks to a few months, and the lowest rejection rates at less than one percent, frequently resulting in excellent vision quality.

CTAK is an additive procedure that inserts a thin, sterile donor inlay into the cornea to reshape and reinforce it without removing any tissue. It is a minimally invasive, stitch-free option primarily for keratoconus that offers a very low rejection risk because your original cornea remains intact and functional.

For select cases of Fuchs' dystrophy, DSO involves removing only the diseased central inner layer and allowing your eye's own healthy peripheral cells to gradually migrate and restore clarity. This approach uses no donor tissue, completely eliminating the risk of graft rejection and providing a unique solution for specific patients.

Your immune system may recognize the donor tissue as foreign and attack it, even though corneal rejection rates are relatively low. Signs include redness, pain, increased light sensitivity, blurred vision, or a cloudy appearance returning to your cornea. If you experience any of these symptoms, call your doctor immediately. Prompt treatment with steroid eye drops can often reverse rejection and save your graft, which is why early detection is so important.

In procedures that use sutures to hold the graft in place, the stitches may occasionally loosen, break, or cause irritation and discomfort. Your surgeon can adjust, tighten, or remove stitches as your eye heals. Once healing is complete and your eye is strong enough, your surgeon will remove all stitches to reduce the risk of infection and scarring.

The new cornea's shape may cause astigmatism, a condition where your eye cannot focus light evenly, leading to blurry or distorted vision at all distances. This is often correctable with glasses or specialty contact lenses. In some cases, minor additional procedures can refine your cornea's shape to reduce or eliminate astigmatism and improve your vision quality.

Infection is rare but serious and must be treated quickly. Using your antibiotic eye drops exactly as prescribed and reporting any signs of infection right away, such as increasing pain, discharge, or redness, usually prevents lasting harm. Keep your eye clean and avoid touching it with unwashed hands during your recovery.