---
title: "Corneal transplant types: PKP vs DMEK vs DALK"
description: "Corneal transplants replace damaged corneal tissue to restore clarity. PKP, DMEK, and DALK are different techniques chosen based on which layers are affected. ## Full-thickness vs partial-thickness grafts PKP replaces all layers of the cornea, while DMEK and DALK replace…"
url: "https://bluefinvision.com/knowledge-base/topics/treatments-procedures/corneal-transplant-types-pkp-vs-dmek-vs-dalk/"
updated: "2025-12-16"
category: "Treatments & Procedures"
---

# Corneal transplant types: PKP vs DMEK vs DALK

Corneal transplants replace damaged corneal tissue to restore clarity. PKP, DMEK, and DALK are different techniques chosen based on which layers are affected.

## Full-thickness vs partial-thickness grafts

PKP replaces all layers of the cornea, while DMEK and DALK replace only selected parts. Preserving healthy tissue often improves strength and healing.

- PKP penetrating keratoplasty for full-thickness scars or thinning
- DMEK for diseases mainly affecting the innermost endothelial layer
- DALK for conditions involving the front stroma but with healthy endothelium
- Each technique uses donor tissue tailored to the problem

## Recovery and visual outcomes

Healing times and risk profiles differ between these operations. Your surgeon chooses the safest effective option for your specific condition.

- DMEK often offers quick visual recovery and low rejection risk
- DALK reduces rejection risk but vision may take longer to sharpen
- PKP remains useful for complex scars or very thin corneas
- All require long-term follow-up and careful drop use