Cornea and ocular surface · AZ
Corneal transplant: full-thickness vs lamellar concepts, aftercare and RSVP
PK · lamellar · rejection alerts · registry survival education
Last reviewed: 2026-09-17 · 潘家健醫生
Key points
- Corneal transplant includes full-thickness and lamellar concepts; aftercare and RSVP warning signs are the education focus.
- RSVP symptoms: do not self-escalate drops — contact the surgeon promptly or go to A&E.
- Severe pain, heavy discharge or sudden vision drop: A&E / 999.
- Registry survival figures are not your personal prognosis or a clinic success rate.
What it is
Corneal transplant (keratoplasty) replaces damaged, cloudy or under-functioning cornea with donor tissue, usually to improve vision, ease pain or restore structure. Public education often groups surgery as:
- Full-thickness (penetrating keratoplasty, PK): replaces the full corneal thickness.
- Lamellar / partial-thickness: replaces only some layers — e.g. anterior lamellar (stroma / front-surface problems) or endothelial / posterior lamellar (endothelial failure).
Which type fits depends on which layers are diseased, scarring, infection history, pressure and the whole eye — only a corneal specialist can decide. This page does not rank “which is best” or clinic success rates.
Why aftercare matters (education, not a guarantee)
Donor tissue is foreign to the body; the immune system may mount rejection. The cornea’s relative “immune privilege” means rejection risk varies by person and disease state — but is never zero. Aftercare commonly includes:
- Protecting the eye; avoid trauma and forceful rubbing
- Anti-inflammatory / anti-rejection drops as directed (classes only; no trade names)
- Timely review for infection, pressure, sutures and graft clarity
Over years, donor endothelial cell density falls; some grafts later cloud from endothelial failure, rejection, infection or disease recurrence — whether to reoperate is individual.
RSVP warning signs (seek care promptly)
The English RSVP mnemonic is used for self-watching after surgery (education):
- Redness
- Sensitivity to light
- Vision change
- Pain
If one or more appear, do not escalate drop doses yourself — contact the operating doctor promptly or go to A&E. Rejection, infection, suture problems and raised pressure can look similar.
Go to A&E now (if you cannot get there, call 999)
- Severe pain, heavy discharge or sudden vision drop → A&E / 999
What a doctor may discuss
- Indications: advanced keratoconus, scar, endothelial decompensation, post-infection opacity and similar (individualised)
- Surgery type (full-thickness vs lamellar), sutures, gas / tamponade when relevant
- Post-op drop plans, pressure monitoring, steroid-related cataract / glaucoma risk (class education)
- How rejection is recognised and managed in principle (intensified anti-inflammatory care — by the doctor)
- Possibility of re-graft and the usual rise in risk with repeat grafts (see registry literature)
Common misconceptions
| Misconception | Closer wording |
|---|---|
| “Good aftercare guarantees success” | Aftercare matters, but original disease, vascularisation, prior rejection and surgery type also matter. |
| “Corneal grafts never reject” | Rejection can occur at any postoperative time; long-term vigilance is needed. |
| “Lamellar equals zero rejection” | Some lamellar approaches can lower certain rejection risks — not a guarantee. |
| “Failure means it can never be redone” | Re-graft is possible, but risk often rises with repeats; individual assessment. |
| “Everyone has the same high success rate” | Registry survival curves vary widely by indication — not personal prognosis. |
Related public education video (HKOS)
Video source: Hong Kong Ophthalmological Society (HKOS) “Eyes Decoded” YouTube (public education)
This site is not affiliated with, and is not the same organisation as, the Hong Kong Ophthalmological Society (HKOS).
Selected public references (not a full bibliography)
These are the public studies this page draws on. PMID links go to PubMed (US National Library of Medicine) so you can check them. Figures are from those studies — not your prognosis and not a clinic success rate. Links are not a shop.
- Williams KA, et al. Risk factors for human corneal graft failure within the Australian corneal graft registry. Transplantation. 2008;86:1720-1724. DOI 10.1097/TP.0b013e3181903b0a. PMID 19104411澳洲角膜移植登記存活／失敗原因教育。不是個人風險／不是品牌比較。
- Williams KA, et al. Factors predictive of corneal graft survival. Report from the Australian Corneal Graft Registry. Ophthalmology. 1992;99:403-414. DOI 10.1016/s0161-6420(92)31960-8. PMID 1565452澳洲角膜移植登記預測因素教育。不是個人預後。
- Vail A, et al.; Collaborating Surgeons Conclusions of the corneal transplant follow up study. Br J Ophthalmol. 1997;81:631-636. DOI 10.1136/bjo.81.8.631. PMID 9349147英國 CTFS；受者因素與早期風險等教育。不是個人保證。
- Vail A, et al.; Corneal Transplant Follow-up Study Collaborators Clinical and surgical factors influencing corneal graft survival, visual acuity, and astigmatism. Ophthalmology. 1996;103:1843-1852. DOI 10.1016/s0161-6420(96)30734-3. PMID 8628559CTFS 臨床與手術因素教育。不是個人預後。
This is general medical information, not a diagnosis, and cannot replace an in-person consultation with a registered ophthalmologist, refraction, or a dilated fundus exam. It is not advice to use any medicine or undergo any procedure. Medicines (including off-label use), laser or surgery must be decided by a registered doctor after examination, according to indications and Hong Kong registration. Figures from the literature are published averages, not any clinic’s results. This site does not book, prescribe or refer. Do not change treatment on your own.