What Is Corneal Transplantation? What You Need to Know Before Deciding

Cornea The cornea is the foremost part of the black eye, playing a crucial role in refracting light entering the eye. It serves as the first barrier protecting the eye from pathogens. When the cornea is damaged, patients need treatment through corneal transplantation to prevent impacts on vision and daily life. This article introduces what corneal transplantation entails, the steps involved, and essential information to know before deciding.

What is corneal transplantation? What are its types?

Corneal transplantation (Corneal Transplantation) is a surgical procedure replacing the cornea to treat clouding or lesions that impair vision. It involves transplanting donor corneal tissue to replace the damaged cornea. There are two main types:

1. Full-thickness corneal transplantation (Penetrating Keratoplasty): This surgery is for patients with severe corneal damage requiring replacement of all corneal layers. It involves a longer recovery period before normal vision returns and carries higher risks compared to other types.

2. Partial-thickness corneal transplantation (Lamellar Keratoplasty): For patients diagnosed with lesions affecting only part of the cornea, only the affected layer is transplanted. Recovery time is shorter. This type has two subtypes:

• Anterior lamellar corneal transplantation (Anterior Lamellar Keratoplasty) is suitable for patients with keratoconus or those with scars on the outermost corneal layer.
• Posterior lamellar corneal transplantation (Endothelial Keratoplasty) is suitable for restoring vision in patients with corneal endothelial diseases such as Fuchs’ dystrophy.

The choice of transplantation type depends on the underlying corneal disease, severity in each patient, and the physician's judgment.

Why undergo corneal transplantation? What benefits does it provide?

Corneal transplantation treats vision problems caused by damaged corneas, such as keratoconus, corneal dystrophies, scars from injuries, or infections. Its benefits include:

• Restoring patients' vision, helping those with corneal inflammation, clouding, blurred vision, or vision loss to see more clearly again.
• Strengthening the cornea in patients with injuries caused by accidents.
• Controlling corneal infections caused by viruses or bacteria.

Preparation and care before and after corneal transplantation

Corneal transplantation treats vision problems caused by damaged corneas, such as keratoconus, corneal dystrophies, scars from injuries, or infections. Its benefits include:

• Restoring patients' vision, helping those with corneal inflammation, clouding, blurred vision, or vision loss to see more clearly again.
• Strengthening the cornea in patients with injuries caused by accidents.
• Controlling corneal infections caused by viruses or bacteria.

Preparation and care before and after corneal transplantation

Corneal transplantation is a delicate procedure requiring skilled surgeons and proper preparation. Following doctors' care instructions is crucial for smooth recovery. Preparation and post-surgery care include:

Before corneal transplantation

• Undergo comprehensive eye health examinations, including detailed measurements of corneal size and thickness by an ophthalmologist.
• Disclose full medical and allergy history to ensure surgery suitability.
• If regularly taking medications, vitamins, or supplements, doctors may advise stopping them at least one week before surgery.
• General anesthesia is required; patients are instructed to avoid food and water before the operation.
• On surgery day, patients should have a companion or arrange accommodation near the hospital for convenience after the procedure.

After corneal transplantation

• Avoid rubbing, pressing, or touching the eye area.
• If prescribed medications, take or apply them strictly as directed by the doctor.
• Keep eyes dry during bathing and avoid swimming for at least 1-2 months.
• Avoid strenuous activities such as heavy lifting or exercise, especially during the first 3-6 months post-surgery.
• Use eye protection like sunglasses or eye shields.
• Avoid work and driving until the doctor permits; typically, normal activities can resume within 1-2 weeks.

Recovery takes about two weeks for vision to improve, but in some cases, improvement may take up to a year or longer, depending on individual healing. Regular follow-up with the doctor is essential.

How is corneal transplantation performed? What are the steps?

The procedure begins with eye health and general condition assessments to confirm readiness for surgery. Anesthesia is administered to manage pain. The surgery lasts about 1-2 hours, during which the damaged cornea is removed and replaced with donor corneal tissue, sutured with fine stitches. After completion, an eye shield is applied for protection.

Risks and issues to know before deciding on corneal transplantation

All types of surgery carry risks, especially corneal transplantation, a complex and delicate procedure. Possible post-surgery complications include:

• Bleeding inside the eye.
• Corneal abrasion or scratches.
• Elevated intraocular pressure or glaucoma.
• Astigmatism or blurry vision due to abnormal corneal curvature.
• Rejection of the donor cornea, causing clouding, eye irritation, light sensitivity, and decreased vision.

If such risks occur and symptoms do not improve despite following medical advice, patients should promptly consult their doctor for appropriate treatment.

Psychological impacts experienced by corneal transplant patients

Beyond physical risks, patients may face psychological effects such as anxiety about surgery outcomes and recovery, feelings of pressure, uncertainty about vision ability, and adapting to daily life changes. Doctors assess physical and mental readiness before surgery.

Factors influencing corneal transplantation success

Long-term success depends on several factors including:

• The condition and strength of the patient’s original cornea.
• Overall patient health, presence of chronic diseases, and adherence to surgery and post-operative care instructions.
• Acceptance of the donor cornea by the immune system.
• Presence of other eye complications such as glaucoma, vitreous degeneration, uveitis, or retinal diseases.
• Surgeon’s expertise.

Success varies by individual; regular medical follow-ups are recommended to ensure the best long-term visual outcomes.

Frequently Asked Questions (FAQs) about corneal transplantation

For those interested in corneal transplantation to improve vision or researching this surgery,here is somecommon information compiled by Samitivej Chinatown Hospital:

How much does corneal transplantation cost? Is it expensive?

The cost varies by hospital and depends on whether the procedure is a full or partial corneal transplant.

When can I return to work after corneal transplantation?

Recovery times vary individually. Typically, patients can resume work or daily activities within 2-3 days, though some may need 1-2 weeks until vision improves.

Can I fly on a plane after corneal transplantation?

It is advisable to wait 1-2 weeks for recovery before flying, depending on individual healing and medical advice.

Corneal transplantation improves vision and quality of life at Samitivej Chinatown Hospital

Corneal transplantation treats vision problems or injuries by removing the damaged cornea and replacing it with healthy donor tissue, restoring clearer vision. Surgery can be partial or full-thickness, depending on disease severity and ophthalmologist evaluation.

Information by:Samitivej Chinatown Hospital

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