Corneal Transplant Surgery — Brisbane

What Is Corneal Transplant Surgery?

Corneal transplant surgery is performed when the clear front window of the eye — the cornea — becomes cloudy, scarred, swollen, or irregular in shape, leading to blurred vision, refractive error, or significant irregular astigmatism. During the procedure, Dr Cronin removes the diseased or damaged layers of your cornea and replaces them with healthy donor tissue to restore your sight.

Donor corneas come from individuals who registered as eye donors before passing away. Donor tissue is collected, rigorously screened, and stored at the Queensland Eye Bank before being matched to patients in need. This gift of sight is treated with the utmost respect by the surgical and healthcare team.

When Is a Corneal Transplant Needed?

Not every case of corneal disease requires a transplant. Less invasive treatments — such as advanced scleral contact lenses, corneal collagen cross-linking, phototherapeutic keratectomy (PTK), or CAIRS keratoplasty — can often restore vision without the need for a full corneal graft. When those options are no longer sufficient, a corneal transplant may be the only way to restore functional sight.

Common reasons a corneal transplant may be required include:

• Corneal scarring caused by infection, trauma, or previous eye surgery
• Corneal infection (microbial keratitis) leading to thinning and vision loss
• Fuchs’ endothelial dystrophy — a degenerative disease of the innermost corneal layer
• Advanced keratoconus with significant central corneal scarring or thinning beyond the reach of CAIRS or cross-linking
• Severe corneal damage from chemical injury, trauma, or disease
• Corneal limbal stem cell failure, which may require specialised stem cell transplantation

The Corneal Transplant Procedure — What to Expect

• Surgery is performed at the South Brisbane Day Hospital with you heavily sedated or asleep under general anaesthesia.
• This is a day surgery procedure — you go home the same day and sleep in your own bed.
• You will use antibiotic eye drops for approximately two weeks and steroid eye drops for three to four months (sometimes longer) after surgery.
• Recovery varies considerably between transplant types. DMEK patients often see meaningful improvement within weeks; DALK and PK patients take longer, with final visual outcomes sometimes taking 12 months or more.
• Dr Cronin will walk you through the specific recovery timeline, activity restrictions, and drop schedule relevant to your procedure during your pre-operative consultation.

Benefits and Risks of Corneal Transplant Surgery

Like any eye surgery, corneal transplantation carries both benefits and risks. Dr Cronin will discuss these with you in detail during your consultation.

Benefits:

• Restoration of clear, functional vision
• Relief of pain from corneal ulcers or severe ocular surface disease
• Improved visual acuity and quality of vision
• Return to daily activities, driving, and work
• A significant improvement in overall quality of life

Risks:

• A lifelong risk of graft rejection (lower for DMEK and DALK than for PK)
• Slower healing than many other eye procedures, because the cornea has no blood supply
• Risk of infection, raised intraocular pressure, or other complications
• Rarely, the need for a repeat transplant if rejection or graft failure occurs

Dr Cronin and his team carefully assess your eye health, ocular surface, and underlying diagnosis to minimise these risks and deliver the best possible outcome.

Recognising and Managing Corneal Graft Rejection

Even with modern surgical techniques, there is always a lifelong risk of corneal graft rejection because the eye’s immune system may recognise the donor tissue as foreign. The warning signs can be remembered using the acronym RSVP:

• Redness of the eye
• Sensitivity to light
• Vision reduction
• Pain in the eye

If you notice any of these symptoms after a corneal transplant, contact Dr Cronin’s rooms or see your eye doctor immediately. Prompt treatment — usually with intensive steroid eye drops — can stop a rejection episode and protect your transplanted cornea.

Optimising the Ocular Surface Before a Corneal Transplant

A corneal transplant is only as successful as the ocular surface it is placed on. Chronic dry eye, meibomian gland dysfunction, lid disease, or limbal stem cell deficiency can all compromise graft survival — no matter how technically perfect the surgery itself is. For this reason, Dr Cronin places particular emphasis on optimising the ocular surface in the weeks and months before transplantation, and on diagnosing stem cell disorders that may need to be addressed first.

This work is informed by Dr Cronin’s own peer-reviewed research on ocular surface stem cells. His systematic review in Stem Cells examined whether mesenchymal stromal cells can differentiate into corneal cells (Cronin BG, Harkin DG, Foyn L, et al. Stem Cells. 2015) — a foundational paper in the field of corneal regenerative medicine that has been cited widely in the international literature. He also co-authored the landmark Australian and New Zealand study on severe limbal stem cell deficiency (Bobba S, Di Girolamo N, Mills R, et al. Clin Exp Ophthalmol. 2017), which established the incidence, causes, and clinical profile of limbal stem cell failure in our region.

For patients with limbal stem cell deficiency, Simple Limbal Epithelial Transplantation (SLET) can restore a healthy corneal surface before a subsequent corneal transplant is performed — dramatically improving the chances of long-term graft survival. In patients with severe dry eye or ocular surface inflammation, an individualised surface optimisation plan (punctal plugs, intense pulsed light, scleral lenses, topical immunomodulators, and meibomian gland treatments) is put in place before any transplant is scheduled.

Alternatives to a Full Corneal Transplant

Dr Cronin’s philosophy is that most patients should never need a full corneal transplant if their disease is identified early. Where possible, he offers less invasive alternatives that preserve the patient’s own corneal tissue:

• Corneal collagen cross-linking halts the progression of keratoconus and can often prevent the need for a transplant later in life.
• CAIRS keratoplasty — Corneal Allogenic Intrastromal Ring Segments — uses arcs of donor tissue to reshape the cornea without the need for a full transplant.
• Specialist contact lens fitting — including scleral and rigid gas-permeable lenses — can often restore functional vision before transplantation is required.
• Phototherapeutic keratectomy (PTK) can remove superficial corneal scarring and delay or avoid transplantation in selected cases.

Where a corneal transplant is ultimately required, Dr Cronin will recommend the least invasive technique consistent with a durable visual outcome.

Why Choose Dr Brendan Cronin for Corneal Transplants in Brisbane

Dr Brendan Cronin has extensive experience performing every form of corneal transplant surgery — from traditional full-thickness grafts (PK), through partial-thickness DALK, to the most modern endothelial techniques (DMEK) and limbal stem cell transplantation (SLET). Patients from across Brisbane, Queensland, and regional Australia are referred to him for his precision, his honesty about surgical alternatives, and his commitment to long-term visual outcomes.

Dr Cronin holds FRANZCO (Fellow, Royal Australian and New Zealand College of Ophthalmologists) and FWCRS (Founding Fellow, World College of Refractive Surgery and Visual Sciences), and has been Principal Investigator on more than 20 international clinical trials in corneal and refractive surgery. He was the first surgeon in Australia to perform femtosecond laser-assisted DALK and one of the first to perform CAIRS keratoplasty in Australia.

Supported by a dedicated team at the Queensland Eye Institute, Dr Cronin provides expert surgical care, comprehensive aftercare, and ongoing support throughout your recovery. His goal is not simply to improve vision, but to restore independence, confidence, and quality of life.