The human eye is a marvel. It allows us to see the world around us in vivid detail. However, various conditions can affect vision, impacting the clarity and quality of sight. One such condition is damage or disease affecting the cornea.
An estimated 47,000 cornea transplants are performed annually in the United States. If your vision has been affected by a corneal injury or disorder, a cornea transplant may be necessary to restore your vision. This article will delve into cornea transplants and information that you should know about this procedure.
What is the Cornea, and Why Is It Important?
Before we get into the procedure, it’s essential to understand what the cornea is and why it is vital to your vision. The cornea is a transparent layer on the front of your eye. It helps to focus light into your eye so you can see. It’s made of multiple layers of cells that work together to ensure you have clear vision.
Your cornea must be healthy, smooth, and clear for good vision. If it’s scarred, swollen, or damaged, light can’t focus properly into your eye. This can result in a glare, blurry vision, or even vision loss.
What is a Cornea Transplant?
If your cornea is damaged, a cornea transplant can be performed to restore your vision. The primary goal of a cornea transplant is to improve or restore vision. Most patients’ vision is at least partially restored as a result of a cornea transplant. The outcome is mainly based on the reason for the surgery and your overall health.
What Conditions are Treated with a Cornea Transplant?
It can also help alleviate pain and other symptoms of cornea diseases. Cornea transplants can be beneficial to treat conditions including:
- Keratoconus
- Fuchs dystrophy
- Scarring of the cornea after injury or infection
- Swelling of the cornea
- Tearing or thinning of the cornea
- Ulcers on the cornea that do not respond to medical treatments
- Complications from prior eye surgery
Risks Related to Cornea Transplants
Although cornea transplants are relatively safe, there is still a slight risk of complications, including:
- Eye infection
- Glaucoma
- Issues with the stitches securing the donor cornea
- Bleeding
- Retinal issues such as swelling or retinal detachment
- Problems with visual acuity because of the irregular curve in the shape of the cornea
Rejection Risks
Along with the risks listed above, rejection of the donor cornea is also a risk. As with any organ donation, the recipient’s immune system can attack the donor cornea. If this happens, you may require further medical treatment or a second cornea transplant. Often, rejection or the donor cornea can be managed with medication.
The following symptoms could signal rejection. If you experience any of these symptoms, contact your vision center immediately.
- Vision loss
- Eye pain
- Light sensitivity
- Red eyes
The risk of rejection and complications after your surgery can continue for years after your procedure. That is why it’s vital to see your eye doctor regularly, as they recommend annually.
Types of Cornea Transplant Surgeries
Your cornea consists of several layers of tissue. The type of surgery you need depends on which tissue layer is affected. Your surgeon will discuss which surgery is best for your situation and let you know what to expect from the procedure.
Here are the different types of cornea transplant surgeries.
Penetrating Keratoplasty
During this operation, the surgeon uses a special instrument to cut through the entire cornea to remove a small disk of tissue less than 1 cm. The donor cornea is cut to match the defect, and sutures will be used to keep the new cornea in place.
Endothelial Keratoplasty
Endothelial keratoplasty removes diseased tissue from the back layers of the cornea, which leads to corneal swelling. There are two types of endothelial keratoplasty.
- Descement Stripping Automated Endothelial Keratoplasty (DSAEK) — Donor tissue replaces the innermost layer of the patient’s cornea. This procedure restores vision loss due to corneal swelling, reduces recovery times compared to PK, and decreases the risk of rejection.
- Descemet Membrane Endothelial Keratoplasty (DMEK) — The tissue used in this procedure is much thinner and more fragile. It’s more complex than DSAEK but has become the most common cornea transplant due to its excellent visual outcomes.
Anterior Lamellar Keratoplasty (ALK)
During this procedure, tissue from the front layers of the cornea, the epithelium, and the stroma are removed, leaving the back layer in place. There are different types of ALK, and the operation will depend on the depth of the damage to your cornea.
- Superficial Anterior Lamella Keratoplasty (SALK) — Replaces the front layers of the cornea, leaving the healthy endothelium and stroma intact.
- Deep Anterior Lamellar Keratoplasty (DALK) — When the damage extends deep into the stroma, the damaged tissue is replaced by donor tissue. This approach helps reduce the risk of rejection, promotes faster healing, and eliminates the need for long-term steroid eyedrops.
Artificial Cornea Transplant
An artificial cornea transplant is also known as keratoprosthesis. You may receive an artificial cornea if you aren’t eligible for a donor cornea.
What to Expect When You Have a Cornea Transplant
Be sure to inform your doctor of all medications that you are taking so they can tell you if you can continue to take them before the surgery. Cornea transplants are outpatient procedures that can take anywhere from 15 minutes to 2 hours to complete.
During the Procedure
Before the procedure begins, the anesthesia team will sedate you, and your surgeon will give an additional anesthetic/paralytic injection. Your medical team will also apply numbing drops to your eye. All of this will ensure you don’t feel any pain during the procedure.
After the Procedure
Corneal transplant surgery is an outpatient procedure. After your procedure, you will likely:
- Receive medication such as eye drops and other medication to keep pain, swelling, and infection controlled. You will also receive eye drops to help prevent cornea rejection.
- Need to wear eye shields or glasses to protect your eye during the healing process.
- Have to lie on your back for a while, depending on the procedure performed. This will help the new tissue stay in place.
- Have to be extremely careful to avoid injury. With your surgeon’s approval, you must slowly work your way back to your typical activities. Avoid pressing or rubbing your eye.
- Be expected to have regularly scheduled appointments with your surgeon for up to a year after your surgery to watch for complications and monitor your progress.
Turn to New Vision Eye Center for World Class Corneal Care
Cornea transplant procedures have transformed the lives of countless individuals worldwide, offering renewed hope and vision where it seemed impossible. Advances in surgical techniques and technology continue to enhance these procedures’ success rates and outcomes, making them increasingly accessible and effective.
At New Vision Eye Center, corneal transplants represent a culmination of specialized expertise, advanced technology, and a commitment to delivering the highest standard of care. We utilize innovative approaches and individualized treatment plans to restore vision and improve the quality of life for all our patients. Trust us to guide you through your corneal transplant journey, ensuring a brighter, clearer vision for a better tomorrow.
Contact us today to schedule an appointment.