Corneal Transplant: Before, During and After Surgery

Your cornea plays a major role in helping you see clearly, yet many people only learn about it when vision problems start affecting everyday life. Conditions like corneal scarring, infections, keratoconus, or swelling can gradually blur vision and make simple tasks such as reading, driving, or using screens difficult. In this blog, you will understand everything about corneal transplant surgery, including why it is done, what happens before, after, and during the procedure, recovery timelines, and risks.

What is the Cornea?

The cornea is the clear, transparent protective outer layer of the eye. It covers pupil, iris, and anterior chamber. When light enters your eye, it gets refracted by the cornea’s dome-shaped, curved edge. It plays a vital role in vision by providing most of the eye’s refractive power and helping focus incoming light onto the retina.

If the cornea gets damaged by some disease, injury, or infection, the scars can disrupt your vision. Therefore, any issue related to the cornea should be dealt with promptly.

In India, corneal blindness is one of the leading causes of visual impairment. This makes awareness about corneal transplant surgery in India extremely important.

What is Corneal Transplant Surgery?

A cornea transplant is a surgical procedure that involves replacing a diseased or scarred part of your cornea with a donor’s healthy corneal tissue. Corneal transplant surgery is done on an outpatient basis and is mostly successful.

The surgery is usually recommended when medications, glasses, or contact lenses no longer improve vision.

The main goals of corneal transplant surgery are to:

• Restore vision
• Reduce pain or discomfort
• Improve the appearance of a damaged cornea
• Prevent worsening corneal disease

Conditions That Require Corneal Transplant Surgery

Doctors recommend corneal transplant surgery for several eye conditions, including:

• Keratoconus: A progressive thinning and cone-shaped bulging of the cornea, one of the most common reasons for transplants in young Indian patients.
• Fuchs’ Dystrophy: A genetic condition where the inner cell layer of the cornea deteriorates over time 
• Corneal Scarring: Permanent scarring of the cornea caused by infections, injuries, or ulcers, which can significantly impair vision.
• Corneal Swelling or Clouding: Persistent fluid buildup in the cornea that causes hazy or blurred vision and may require surgical treatment if medications are ineffective.
• Bullous Keratopathy: A condition characterized by painful fluid-filled blisters on the cornea, often developing as a complication of previous eye surgery.

Types of Corneal Transplant Surgery

Not all transplants involve replacing the entire cornea. Depending on the extent of the damage, surgeons choose different techniques.

• Penetrating Keratoplasty (PK): Replaces the full thickness of the cornea and is recommended for severe corneal scarring, advanced keratoconus, or extensive corneal damage. It restores vision by replacing the entire damaged cornea.
• Deep Anterior Lamellar Keratoplasty (DALK): Replaces the front and middle layers of the cornea and is commonly used for keratoconus and superficial corneal scars. It preserves the healthy inner corneal layer, reducing the risk of graft rejection.
• Descemet Stripping Endothelial Keratoplasty (DSEK): Replaces the inner endothelial layer along with a thin layer of tissue. It is often performed for Fuchs’ dystrophy and corneal swelling, offering quicker healing and less discomfort due to a smaller incision.
• Descemet Membrane Endothelial Keratoplasty (DMEK): Replaces only the damaged endothelial cells and is best suited for early endothelial diseases. It provides excellent visual outcomes and generally has a lower risk of graft rejection than full-thickness transplantation and some other endothelial keratoplasty techniques. 
• Artificial Cornea Transplant (Keratoprosthesis): Uses an artificial corneal device instead of donor tissue. It is generally reserved for patients with repeated graft failures and is useful when traditional donor transplants are unlikely to succeed.

What to Expect Before A Corneal Transplant Surgery?

There are several things you can expect to undergo before a corneal transplant surgery:

• Comprehensive eye exam:
  An overall eye checkup helps the doctor assess the current condition of your eyes. The doctor will also determine what size of the donor cornea you need.
• Discussion of the medications you are taking:
  It is imperative for your doctor to know what medications and supplements you are taking. You can be asked to stop taking them before or after cornea transplant surgery, such as blood thinners like aspirin or warfarin and any supplements.
• Donor tissue matching 
  Unlike organ transplants, corneal transplants don’t require blood-type matching, which increases transplant success rates. However, donor tissue quality is assessed rigorously. Donor corneal tissue is carefully screened, evaluated and preserved by an accredited eye bank. The allowable time between donation, preservation and transplantation depends on the eye-bank protocol and preservation method.
• Fasting instructions 
  If fasting or medication adjustments are required, your surgical team will provide specific instructions based on the type of anaesthesia and your individual medical condition. 

What Happens During Corneal Transplant Surgery? 

Corneal transplant surgery time ranges from 60 to 90 minutes, though this varies depending on the procedure type and complexity.

Here’s a general walkthrough:

• Anaesthesia: Local anaesthesia is used to numb the eye. A mild sedative is given intravenously to keep you relaxed. You are awake but feel no pain.
• Incision:  The surgeon makes a precise circular cut to remove the damaged corneal tissue using an instrument called a trephine.
• Donor placement:  The pre-cut donor tissue is carefully placed. In PK surgery, it’s secured with ultra-fine sutures (thinner than a human hair). In DSEK/DMEK, an air bubble is injected to press the new layer into position, with no sutures required in some cases.
• Closure: The eye is patched and protected once the procedure is complete. You will rest briefly in a recovery room before being discharged, usually within a few hours.

What Happens After A Transplant Surgery?

After your corneal transplant surgery, you can expect:

• Medications: Your surgeon will prescribe you with certain medications like eye drops, oral medicines to control swelling, pain, and infection.
• Eye patch: You can be expected to wear an eye patch to protect your eyes after the surgery.
• Get into a healthy routine slowly: Take it easy when it comes to getting back into your routine life. Take all necessary precautions to avoid further infections, injuries, or eye strain.
• Follow-up exams: You might expect to get back to your doctor for frequent eye check-ups, at least for the first year after the surgery.