Donors Predisposed by Corneal Collagen Cross-linking in Deep Lamellar Keratoplasty for the Patients With Keratoconus

The Study was designed as a randomized controlled study with the following objectives: To investigate whether use of donors predisposed by corneal collagen cross-linking (CXL) reduced myopic refractive errors for keratoconic eyes after Deep anterior lamellar keratoplasty (DALK). Overall 70 patients are planned to recruit., the patients were assigned to CXL graft group, in which corneal donors predisposed by CXL were used, or the conventional graft group, in which corneal donors stored in corneal storage media were used. The patients will be followed-up for 24 months.