[Advances in penetrating keratoplasty technique].

Rejection after corneal transplantation is currently the lead of the main reasons for corneal graft failure. Penetrating keratoplasty (PK) is still one of the gold standard surgeries for these patients. In recent years, improving the surgical techniques to reduce the incidence of corneal allograft rejection has been the way to more and more attention to the majority of ophthalmologists. To generalize and analyze the recent research of new technologies of femtosecond laser shaped penetrating keratoplasty of top-hat configuration (FS-TH-PKP), manual top-hat wound configuration for penetrating keratoplasty (M-TH-PKP), and half-top-hat penetrating keratoplasty (HTH-PKP) surgeries.