Postkeratoplasty Astigmatism Treatment with a Combination of Intrastromal Corneal Ring Segment Implantation and Photorefractive Keratectomy

June consultation #3

“…We have recently studied the association of ICRS and PRK (unpublished data) for the treatment of postkeratoplasty astigmatism, and I believe this would be an interesting option for this patient. 7–9 The theoretical basis underlying this approach is as follows: (1) As intrastromal implants, ICRS would affect the entire warped graft, thus regularizing the pattern of astigmatism overall and providing biomechanical strengthening, which would improve stability in the long-term; (2) PRK would act as a secondary treatment correcting residual astigmatism after ICRS implantation as good results have been reported for low and moderate amounts of postkeratoplasty astigmatism.…”