Partial Corneal Transplants: Types, Benefits, and Potential Risks
Written and medically reviewed per our medical review policy · Last reviewed July 3, 2026
Why the Shift Toward Partial Transplants?
Why replace the whole cornea when only one layer is sick? Two decades of research settled it: transplanting only the affected layers significantly reduces rejection risk and, in suitable cases, delivers better visual outcomes than a full-thickness graft.
DALK, Deep Anterior Lamellar Keratoplasty
In DALK, the diseased front layers of the cornea are removed while your own healthy endothelium stays in place. That is the major advantage, because you keep your original endothelium, endothelial rejection risk is virtually zero. DALK suits keratoconus and scars limited to the front of the cornea.
DMEK and DSAEK, Endothelial Keratoplasty
Here the surgeon replaces only the very thin endothelial layer and leaves the rest of the cornea untouched. Visual outcomes are excellent, and recovery is significantly faster. DMEK gives sharper vision than DSAEK, but it demands a higher level of surgical expertise.
Comparing the Three Types
The short version: PKP for deep, full-thickness scars; DALK for keratoconus and anterior scars where the endothelium is still healthy; DMEK or DSAEK for Fuchs dystrophy and isolated endothelial damage.
The right transplant type is decided after a thorough evaluation of your case. Contact Dr. Ahmed Shaarawy's clinic for a specialist opinion.
Do you wake up with foggy vision?
Corneal edema symptoms as you actually see them
Endothelial dystrophy (Fuchs / inner-cell loss) causes foggy vision that's worst in the morning and improves slightly through the day. Drag the divider to see what patients experience.
Driving at night
Soft halos and glare around lights, especially in low-light conditions
Read this text clearly
A clear inner cornea keeps vision crisp
Read this text clearly
A clear inner cornea keeps vision crisp
Reading
Foggy as if looking through a misted window, worst in the morning
Eye chart
Uniformly blurred letters, improves slightly through the day but never sharpens
DMEK and DSAEK restore transparency with rapid recovery
Have a related case?
Send your topography, OCT, or symptoms to Dr. Shaarawy. We respond in English within 24 hours.