“…Paracentral incisional procedures have also been used in the correction of postkeratoplasty myopia and hyperopia, yet radial keratotomy performed in corneal grafts has high variability and suboptimal predictability. 22 Hexagonal keratotomy has been used with limited success because of a high incidence of irregular astigmatism. 42,43 In the last several years, the excimer laser has acquired a significant role in the management of postkeratoplasty refractive errors.…”