Corneal wedge resection in treating progressive keratoconus astigmatism after deep anterior lamellar keratoplasty

Objective To investigate the clinical effect of corneal wedge resection to treat progressive keratoconus astigmatism after deep anterior lamellar keratoplasty (DALK).Methods Six cases (6 keratoconus eyes) after DALK with progressive astigmatism were retrospectively analyzed.A pair of symmetric or asymmetric host tissue wedge resections were made on the host cornea on the border of the graft - host interface.Naked or best corrected visual acuity,compute assisted refractive power examination,corneal topography were followed up for 36 months.Results Three years after corneal wedge resection,best corrected visual acuity changed from 0.62 ± 0.16 before surgery to 0.73 ± 0.16 after surgery ( P ＞ 0.05 ).K value was progressed from 8.37 ± 2.91 before surgery to 2.86 ± 2.06 after surgery ( P ＜ 0.01 ).Frame glasses were accepted by all the cases at the end of following up period.Conclusion Corneal wedge resection is an effective method in treating progressive keratoconus astigmatism after DALK. Key words: Keratoconus; Keratoplasty,deep anterior lamellar; Astigmatism; Corneal wedge resection; Corneal topography