The cornea is the clear, dome-shaped front surface of the eye that helps focus light onto the retina. When the cornea becomes severely damaged, scarred, swollen, infected, or structurally weak, vision can become blurred and may not improve adequately with glasses or contact lenses.

In some patients, medication, specialty contact lenses, corneal cross-linking, or other treatments may be sufficient. However, when the corneal tissue is too damaged or diseased, corneal transplantation may be recommended.

At Vision Eye Centre, corneal conditions are evaluated by experienced ophthalmologists using detailed eye examinations and advanced diagnostic technology. The appropriate treatment depends on the underlying corneal condition, its severity, the layers of the cornea involved, and the patient's overall eye health.

What Is a Corneal Transplant?

A corneal transplant, also called keratoplasty, is a surgical procedure in which damaged or diseased corneal tissue is replaced with healthy donor corneal tissue.

The goal is to restore or improve the transparency and structural function of the cornea and, where possible, improve vision.

A corneal transplant does not necessarily mean that the entire cornea has to be replaced. Modern corneal surgery allows surgeons to replace only the affected layer in selected patients.

The main types include:

• Penetrating Keratoplasty (PK)

• Deep Anterior Lamellar Keratoplasty (DALK)

• Descemet's Stripping Endothelial Keratoplasty (DSEK/DSAEK)

• Descemet Membrane Endothelial Keratoplasty (DMEK)

The most appropriate procedure is selected after examining the patient's cornea and identifying which layers are affected.

When Is a Corneal Transplant Needed?

A corneal transplant is generally considered when the cornea is significantly affected and other treatments are unlikely to provide adequate visual improvement or restore corneal function.

Some of the conditions that may lead to corneal transplantation include the following.

1. Advanced Keratoconus

Keratoconus is a condition in which the cornea progressively becomes thinner and develops an irregular, cone-like shape.

In its earlier stages, treatment may include:

• Glasses

• Specialty contact lenses

• Corneal cross-linking

• Other corneal procedures, depending on the individual case

A transplant may be considered when keratoconus becomes advanced and causes severe corneal distortion, scarring, or significant visual impairment that cannot be adequately managed with other options.

Depending on the condition of the cornea, a surgeon may consider a procedure such as DALK rather than replacing the entire cornea.

2. Corneal Scarring

A scar on the cornea can interfere with the passage and focusing of light.

Corneal scarring can occur following:

• Eye injuries

• Severe infections

• Corneal ulcers

• Chemical injuries

• Certain inflammatory conditions

• Previous eye surgery

If a scar is deep or located in an area that significantly affects vision, and other treatments cannot restore useful vision, corneal transplantation may be considered.

3. Corneal Dystrophies

Corneal dystrophies are a group of inherited or progressive conditions that affect different layers of the cornea.

Some dystrophies primarily affect the corneal surface, while others involve deeper layers or the endothelial cells responsible for maintaining corneal clarity.

Depending on which layer is affected, a patient may be considered for a selective corneal transplant procedure rather than a full-thickness transplant.

4. Corneal Swelling

The cornea needs to remain relatively clear and dehydrated to maintain normal transparency.

Damage or dysfunction of the corneal endothelial cells can cause fluid accumulation and corneal swelling. This may occur in conditions such as Fuchs endothelial corneal dystrophy or after certain types of eye surgery.

In selected cases where the endothelial layer is significantly damaged, an endothelial keratoplasty such as DMEK or DSEK may be considered.

5. Failed Previous Corneal Transplant

Some patients who have previously undergone corneal transplantation may experience graft failure or other complications.

A failed graft can cause:

• Reduced vision

• Corneal swelling

• Hazy or cloudy cornea

• Discomfort in some cases

After detailed evaluation, a repeat corneal transplant may sometimes be recommended.

6. Severe Corneal Infection

Serious corneal infections can sometimes cause extensive tissue damage and permanent scarring.

Doctors generally attempt to control the infection with appropriate medical treatment first. If the infection causes severe structural damage, threatens the integrity of the eye, or leaves significant corneal scarring, surgery may become necessary.

Does Every Patient With a Corneal Problem Need a Transplant?

No.

A corneal transplant is not the first treatment for every corneal condition.

Depending on the diagnosis, doctors may recommend:

• Prescription medicines

• Lubricating eye drops

• Antibiotic or antiviral treatment when appropriate

• Glasses

• Specialty contact lenses

• Scleral lenses

• Corneal cross-linking for selected keratoconus patients

• Other corneal procedures

• Observation and regular monitoring

The decision depends on the severity and progression of the condition and how well the patient responds to less invasive treatments.

This is why a detailed corneal evaluation is important before deciding on surgery.

How Is a Corneal Transplant Performed?

The exact surgical technique depends on the affected part of the cornea.

Penetrating Keratoplasty

In penetrating keratoplasty (PK), the surgeon removes the full thickness of the diseased cornea and replaces it with a similarly shaped donor corneal button.

PK may be considered when multiple corneal layers are severely damaged.

Deep Anterior Lamellar Keratoplasty

DALK replaces the diseased anterior layers of the cornea while preserving the patient's healthy Descemet membrane and endothelium when appropriate.

It may be considered in selected patients with conditions such as advanced keratoconus where the deeper corneal layers remain healthy.

One potential advantage of preserving the patient's own endothelium is a lower risk of endothelial graft rejection compared with a full-thickness transplant.

DSEK/DSAEK

These procedures replace the diseased posterior corneal layers, including the endothelial layer, while preserving most of the patient's corneal tissue.

They may be used for selected conditions involving endothelial dysfunction.

DMEK

Descemet Membrane Endothelial Keratoplasty (DMEK) replaces the diseased endothelial layer and Descemet membrane with donor tissue.

It is used for selected corneal endothelial disorders and requires specialized surgical expertise.

How Does a Doctor Decide Which Corneal Transplant Is Appropriate?

The decision is based on several factors, including:

• The underlying corneal disease

• Location and depth of corneal damage

• Corneal thickness

• Corneal shape and topography

• Condition of the corneal endothelium

• Presence of corneal scarring

• Previous eye surgeries

• Existing eye conditions

• Visual requirements

• Overall eye health

Advanced diagnostic testing can help doctors understand which part of the cornea is affected.

At Vision Eye Centre, patients can undergo detailed evaluation for corneal conditions before a treatment plan is recommended.

Corneal Transplant Evaluation at Vision Eye Centre

A proper evaluation is an important step before deciding whether transplantation is appropriate.

Depending on the condition, an ophthalmologist may perform:

Comprehensive Eye Examination

The doctor evaluates visual acuity, the cornea, anterior segment, pupil and other structures of the eye.

Corneal Topography and Tomography

These tests help assess the shape and thickness of the cornea and can be particularly useful in conditions such as keratoconus.

Slit-Lamp Examination

A slit-lamp examination allows the ophthalmologist to examine the cornea in detail and identify abnormalities such as scarring, deposits, swelling or other changes.

Corneal Thickness Assessment

Corneal thickness measurements can provide important information when evaluating corneal disease and planning treatment.

Endothelial Evaluation

For patients with suspected endothelial disease, assessment of the corneal endothelium can help determine whether an endothelial procedure may be appropriate.

The tests recommended will vary according to the patient's symptoms and diagnosis.

What Happens After a Corneal Transplant?

Recovery depends on the type of transplant and the individual patient.

Patients may need:

• Prescription eye drops

• Regular follow-up examinations

• Protection of the eye during the early recovery period

• Monitoring for inflammation or infection

• Monitoring for signs of graft rejection

• Suture management in procedures where sutures are used

Vision may improve gradually rather than immediately.

The recovery timeline can vary considerably between different transplant procedures. A full-thickness transplant generally takes longer to stabilize than some selective-layer procedures.

Patients should follow their surgeon's instructions carefully and attend all scheduled follow-up appointments.

What Are the Warning Signs After a Corneal Transplant?

Patients who have undergone corneal transplantation should contact their ophthalmologist promptly if they develop symptoms such as:

• Sudden or significant reduction in vision

• Increasing eye redness

• New or worsening eye pain

• Increased sensitivity to light

• Excessive watering

• New corneal cloudiness

These symptoms can have different causes, but they should not be ignored after corneal transplantation because some complications require prompt treatment.

Is Corneal Transplant Surgery Safe?

Corneal transplantation is an established surgical treatment for severe corneal disease. However, like any surgical procedure, it has potential risks.

Depending on the procedure, risks can include:

• Infection

• Inflammation

• Changes in vision

• Astigmatism

• Graft rejection

• Graft failure

• Raised eye pressure

• Need for additional treatment or surgery

The level of risk varies according to the patient's condition, the type of transplant and other individual factors.

Your ophthalmologist can explain the expected benefits and potential risks after evaluating your eyes.

Corneal Transplant vs Corneal Cross-Linking

These treatments are sometimes confused, particularly by patients with keratoconus.

They have different purposes.

Corneal cross-linking is generally used to strengthen the cornea and slow or stop progression of keratoconus in appropriately selected patients.

Corneal transplantation replaces diseased corneal tissue with donor tissue and may be considered when the cornea has advanced disease, severe scarring, significant distortion, or other damage that cannot be adequately managed with less invasive treatment.

Therefore, a patient with keratoconus does not automatically need a corneal transplant.

Early diagnosis can be important because treatment options may be broader when corneal disease is identified before advanced damage develops.

Can Vision Improve After a Corneal Transplant?

The main objective of transplantation is to restore a healthy, functioning corneal surface and improve visual potential.

However, the final visual result varies between patients.

Vision after surgery can be affected by:

• The original corneal condition

• Type of transplant

• Healing

• Astigmatism

• Other eye diseases

• Graft clarity

• Individual response to surgery

Some patients may still require glasses or contact lenses after transplantation.

A doctor should therefore discuss expected visual outcomes based on the patient's specific condition rather than promising a particular level of vision.

Why Choose Vision Eye Centre for Corneal Care?

Vision Eye Centre provides ophthalmic care across a range of eye conditions, including corneal disorders, keratoconus and corneal surgery.

The centre's ophthalmology services are supported by diagnostic facilities and specialized technology used for evaluating different eye conditions.

For patients with corneal disease, the treatment approach should be based on an accurate diagnosis rather than simply choosing surgery. The team at Vision Eye Centre evaluates the condition of the cornea and considers whether medical treatment, specialty lenses, corneal cross-linking, a selective-layer procedure or another surgical option may be appropriate.

The centre has locations in Siri Fort Road and West Patel Nagar, New Delhi, allowing patients from different parts of Delhi to access ophthalmic consultation and treatment.

Who Should Consider a Corneal Transplant Consultation?

You may benefit from a specialist corneal evaluation if you have:

• Advanced keratoconus

• Significant corneal scarring

• Repeated corneal infections

• Corneal dystrophy

• Persistent corneal swelling

• Endothelial dysfunction

• Poor vision that cannot be adequately corrected with glasses or contact lenses

• A previous corneal transplant that is no longer functioning properly

• A corneal condition for which other treatments have not provided sufficient improvement

A consultation does not automatically mean that you will need surgery. The purpose of the evaluation is to determine the cause of your vision problem and identify the most appropriate treatment.

Frequently Asked Questions About Corneal Transplantation

What is the main reason for a corneal transplant?

A corneal transplant may be considered when the cornea is severely diseased, damaged, scarred, swollen or structurally abnormal and other treatment options cannot provide adequate visual or functional improvement.

Is corneal transplant surgery painful?

The procedure is performed using appropriate anesthesia. Some patients may experience irritation, watering, light sensitivity or discomfort during recovery. Your surgeon will provide postoperative medication and instructions.

How long does it take to recover from a corneal transplant?

Recovery varies according to the type of transplant and individual healing. Some procedures stabilize relatively faster than full-thickness transplantation, while visual recovery after penetrating keratoplasty can take considerably longer.

Can keratoconus be treated without a corneal transplant?

Yes. Many patients with keratoconus can be managed without transplantation, particularly when the condition is identified early. Options may include glasses, specialty contact lenses and corneal cross-linking in appropriately selected patients.

Is a corneal transplant permanent?

A corneal graft can function for many years, but its long-term survival varies. Graft rejection, failure and other complications can occur, and some patients may eventually require further treatment.

Can I wear glasses after a corneal transplant?

Yes. Some patients need glasses or contact lenses after surgery to achieve their best possible vision, depending on the procedure and postoperative corneal shape.

Is every corneal transplant a full corneal replacement?

No. Modern corneal transplantation can involve replacing only the affected layers. Procedures such as DALK, DSEK and DMEK are designed for specific types of corneal disease.

When should I see a cornea specialist?

If you have persistent blurred vision, corneal scarring, keratoconus, repeated eye infections, unexplained corneal swelling or reduced vision that cannot be adequately corrected, a corneal specialist evaluation can help determine the cause and available treatment options.

Get a Corneal Evaluation at Vision Eye Centre

If you have been diagnosed with keratoconus, corneal scarring, corneal dystrophy, corneal swelling or another corneal condition, a specialist evaluation can help determine whether you need medical treatment, a corneal procedure or transplantation.

At Vision Eye Centre, Delhi, the ophthalmology team provides evaluation and treatment for a range of corneal disorders and uses specialized diagnostic technology to assess the condition of the cornea.

Book a consultation with Vision Eye Centre to discuss your symptoms, diagnosis and treatment options with an ophthalmologist.

Vision Eye Centre
Siri Fort Road, New Delhi
West Patel Nagar, New Delhi

Medical information on this page is for educational purposes and should not replace an examination or individualized advice from an ophthalmologist. The suitability of corneal transplantation and the choice of surgical technique depend on the patient's individual eye condition.