Fig. 2

The surgical image and schematic diagram of the combined interrupted and continuous intrastromal suturing in PK. A Large-diameter PK with a combination of interrupted and intrastromal running suturing (red arrow). B The technique of combined interrupted and continuous intrastromal suturing was performed first with eight radial interrupted sutures (coarse solid lines), followed by intrastromal sutures (dotted line). The needle’s entry and exit points were the same to ensure that the intrastromal sutures passes over the intrastromal and deep layers rather than the epithelial layer alone. Finally, the graft-host junction was strengthened by additional eight sutures (fine solid lines). PK, penetrating keratoplasty